How to use the Usage API and Cost API to monitor your OpenAI usage

For most of our users, the default usage and cost dashboards are sufficient. However, if you need more detailed data or a custom dashboard, you can use the Completions Usage API.

This notebook demonstrates how to retrieve and visualize usage data from the OpenAI Completions Usage API and Costs API. We'll:

Call the API to get completions usage data.
Parse the JSON response into a pandas DataFrame.
Visualize token usage over time using matplotlib.
Use grouping by model to analyze token usage across different models.
Display model distribution with a pie chart.

We also include placeholders for all possible API parameters for a comprehensive overview.

# Install required libraries (if not already installed)
!pip install requests pandas numpy matplotlib --quiet

# Import libraries
import requests
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
import time
import json

# For inline plotting in Jupyter
%matplotlib inline

Setup API Credentials and Parameters

Set up an Admin Key - https://platform.openai.com/settings/organization/admin-keys

Replace 'PLACEHOLDER' with your actual ADMIN API key. It's best practice to load the key from an environment variable for security.

# Reusable function for retrieving paginated data from the API
def get_data(url, params):
    # Set up the API key and headers
    OPENAI_ADMIN_KEY = 'PLACEHOLDER'

    headers = {
        "Authorization": f"Bearer {OPENAI_ADMIN_KEY}",
        "Content-Type": "application/json",
    }

    # Initialize an empty list to store all data
    all_data = []

    # Initialize pagination cursor
    page_cursor = None

    # Loop to handle pagination
    while True:
        if page_cursor:
            params["page"] = page_cursor

        response = requests.get(url, headers=headers, params=params)

        if response.status_code == 200:
            data_json = response.json()
            all_data.extend(data_json.get("data", []))

            page_cursor = data_json.get("next_page")
            if not page_cursor:
                break
        else:
            print(f"Error: {response.status_code}")
            break

    if all_data:
        print("Data retrieved successfully!")
    else:
        print("Issue: No data available to retrieve.")
    return all_data

# Define the API endpoint
url = "https://api.openai.com/v1/organization/usage/completions"

# Calculate start time: n days ago from now
days_ago = 30
start_time = int(time.time()) - (days_ago * 24 * 60 * 60)

# Define parameters with placeholders for all possible options
params = {
    "start_time": start_time,  # Required: Start time (Unix seconds)
    # "end_time": end_time,  # Optional: End time (Unix seconds)
    "bucket_width": "1d",  # Optional: '1m', '1h', or '1d' (default '1d')
    # "project_ids": ["proj_example"],  # Optional: List of project IDs
    # "user_ids": ["user_example"],     # Optional: List of user IDs
    # "api_key_ids": ["key_example"],   # Optional: List of API key IDs
    # "models": ["o1-2024-12-17", "gpt-4o-2024-08-06", "gpt-4o-mini-2024-07-18"],  # Optional: List of models
    # "batch": False,             # Optional: True for batch jobs, False for non-batch
    # "group_by": ["model"],     # Optional: Fields to group by
    "limit": 7,  # Optional: Number of buckets to return, this will chunk the data into 7 buckets
    # "page": "cursor_string"   # Optional: Cursor for pagination
}

usage_data = get_data(url, params)

Data retrieved successfully!

Inspect the JSON Response

Let's take a look at the raw JSON response from the API to understand its structure.

print(json.dumps(usage_data, indent=2))

[
  {
    "object": "bucket",
    "start_time": 1736616660,
    "end_time": 1736640000,
    "results": [
      {
        "object": "organization.usage.completions.result",
        "input_tokens": 141201,
        "output_tokens": 9756,
        "num_model_requests": 470,
        "project_id": null,
        "user_id": null,
        "api_key_id": null,
        "model": null,
        "batch": null,
        "input_cached_tokens": 0,
        "input_audio_tokens": 0,
        "output_audio_tokens": 0
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736640000,
    "end_time": 1736726400,
    "results": [
      {
        "object": "organization.usage.completions.result",
        "input_tokens": 45949,
        "output_tokens": 282,
        "num_model_requests": 150,
        "project_id": null,
        "user_id": null,
        "api_key_id": null,
        "model": null,
        "batch": null,
        "input_cached_tokens": 0,
        "input_audio_tokens": 0,
        "output_audio_tokens": 0
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736726400,
    "end_time": 1736812800,
    "results": [
      {
        "object": "organization.usage.completions.result",
        "input_tokens": 3718360,
        "output_tokens": 97756,
        "num_model_requests": 3053,
        "project_id": null,
        "user_id": null,
        "api_key_id": null,
        "model": null,
        "batch": null,
        "input_cached_tokens": 76544,
        "input_audio_tokens": 5776,
        "output_audio_tokens": 3166
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736812800,
    "end_time": 1736899200,
    "results": [
      {
        "object": "organization.usage.completions.result",
        "input_tokens": 52786,
        "output_tokens": 38204,
        "num_model_requests": 157,
        "project_id": null,
        "user_id": null,
        "api_key_id": null,
        "model": null,
        "batch": null,
        "input_cached_tokens": 5440,
        "input_audio_tokens": 4066,
        "output_audio_tokens": 1097
      }
    ]
  },
  {
    "object": "bucket",
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    "results": [
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        "output_tokens": 1835,
        "num_model_requests": 55,
        "project_id": null,
        "user_id": null,
        "api_key_id": null,
        "model": null,
        "batch": null,
        "input_cached_tokens": 192,
        "input_audio_tokens": 2520,
        "output_audio_tokens": 1549
      }
    ]
  },
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      }
    ]
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    "results": [
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        "num_model_requests": 2687,
        "project_id": null,
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        "model": null,
        "batch": null,
        "input_cached_tokens": 25344,
        "input_audio_tokens": 0,
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    ]
  },
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]

Parse the API Response and Create a DataFrame

Now we will parse the JSON data, extract relevant fields, and create a pandas DataFrame for easier manipulation and analysis.

# Initialize a list to hold parsed records
records = []

# Iterate through the data to extract bucketed data
for bucket in usage_data:
    start_time = bucket.get("start_time")
    end_time = bucket.get("end_time")
    for result in bucket.get("results", []):
        records.append(
            {
                "start_time": start_time,
                "end_time": end_time,
                "input_tokens": result.get("input_tokens", 0),
                "output_tokens": result.get("output_tokens", 0),
                "input_cached_tokens": result.get("input_cached_tokens", 0),
                "input_audio_tokens": result.get("input_audio_tokens", 0),
                "output_audio_tokens": result.get("output_audio_tokens", 0),
                "num_model_requests": result.get("num_model_requests", 0),
                "project_id": result.get("project_id"),
                "user_id": result.get("user_id"),
                "api_key_id": result.get("api_key_id"),
                "model": result.get("model"),
                "batch": result.get("batch"),
            }
        )

# Create a DataFrame from the records
df = pd.DataFrame(records)

# Convert Unix timestamps to datetime for readability
df["start_datetime"] = pd.to_datetime(df["start_time"], unit="s")
df["end_datetime"] = pd.to_datetime(df["end_time"], unit="s")

# Reorder columns for better readability
df = df[
    [
        "start_datetime",
        "end_datetime",
        "start_time",
        "end_time",
        "input_tokens",
        "output_tokens",
        "input_cached_tokens",
        "input_audio_tokens",
        "output_audio_tokens",
        "num_model_requests",
        "project_id",
        "user_id",
        "api_key_id",
        "model",
        "batch",
    ]
]

# Display the DataFrame
df.head()

	start_datetime	end_datetime	start_time	end_time	input_tokens	output_tokens	input_cached_tokens	input_audio_tokens	output_audio_tokens	num_model_requests	project_id	user_id	api_key_id	model	batch
0	2025-01-11 17:31:00	2025-01-12	1736616660	1736640000	141201	9756	0	0	0	470	None	None	None	None	None
1	2025-01-12 00:00:00	2025-01-13	1736640000	1736726400	45949	282	0	0	0	150	None	None	None	None	None
2	2025-01-13 00:00:00	2025-01-14	1736726400	1736812800	3718360	97756	76544	5776	3166	3053	None	None	None	None	None
3	2025-01-14 00:00:00	2025-01-15	1736812800	1736899200	52786	38204	5440	4066	1097	157	None	None	None	None	None
4	2025-01-15 00:00:00	2025-01-16	1736899200	1736985600	35664	1835	192	2520	1549	55	None	None	None	None	None

Visualize Token Usage Over Time

We'll create a bar chart to visualize input and output token usage for each time bucket.

if not df.empty:
    plt.figure(figsize=(12, 6))

    # Create bar charts for input and output tokens
    width = 0.35  # width of the bars
    indices = range(len(df))

    plt.bar(indices, df["input_tokens"], width=width, label="Input Tokens", alpha=0.7)
    plt.bar(
        [i + width for i in indices],
        df["output_tokens"],
        width=width,
        label="Output Tokens",
        alpha=0.7,
    )

    # Set labels and ticks
    plt.xlabel("Time Bucket")
    plt.ylabel("Number of Tokens")
    plt.title("Daily Input vs Output Token Usage Last 30 Days")
    plt.xticks(
        [i + width / 2 for i in indices],
        [dt.strftime("%Y-%m-%d") for dt in df["start_datetime"]],
        rotation=45,
    )
    plt.legend()
    plt.tight_layout()
    plt.show()
else:
    print("No data available to plot.")

Visual Example: Grouping by Model

In this section, we retrieve and visualize usage data grouped by model and project_id. This can help you see the total tokens used by each model over the specified period.

Note on Grouping Parameter

If you do not specify a group_by parameter, fields such as project_id, model, and others will return as null. Although the group_by parameter is optional, it is recommended to include it in most cases to retrieve meaningful data.
You can specify multiple group fields by separating them with commas. For example: group_by=["model", "project_id"].

# Calculate start time: n days ago from now
days_ago = 30
start_time = int(time.time()) - (days_ago * 24 * 60 * 60)

# Define parameters with grouping by model and project_id
params = {
    "start_time": start_time,  # Required: Start time (Unix seconds)
    "bucket_width": "1d",  # Optional: '1m', '1h', or '1d' (default '1d')
    "group_by": ["model", "project_id"],  # Group data by model and project_id
    "limit": 7,  # Optional: Number of buckets to return
}

# Initialize an empty list to store all data
all_group_data = get_data(url, params)

# Initialize a list to hold parsed records
records = []

# Iterate through the data to extract bucketed data
for bucket in all_group_data:
    start_time = bucket.get("start_time")
    end_time = bucket.get("end_time")
    for result in bucket.get("results", []):
        records.append(
            {
                "start_time": start_time,
                "end_time": end_time,
                "input_tokens": result.get("input_tokens", 0),
                "output_tokens": result.get("output_tokens", 0),
                "input_cached_tokens": result.get("input_cached_tokens", 0),
                "input_audio_tokens": result.get("input_audio_tokens", 0),
                "output_audio_tokens": result.get("output_audio_tokens", 0),
                "num_model_requests": result.get("num_model_requests", 0),
                "project_id": result.get("project_id", "N/A"),
                "user_id": result.get("user_id", "N/A"),
                "api_key_id": result.get("api_key_id", "N/A"),
                "model": result.get("model", "N/A"),
                "batch": result.get("batch", "N/A"),
            }
        )

# Create a DataFrame from the records
df = pd.DataFrame(records)

# Convert Unix timestamps to datetime for readability
df["start_datetime"] = pd.to_datetime(df["start_time"], unit="s", errors="coerce")
df["end_datetime"] = pd.to_datetime(df["end_time"], unit="s", errors="coerce")

# Reorder columns for better readability
df = df[
    [
        "start_datetime",
        "end_datetime",
        "start_time",
        "end_time",
        "input_tokens",
        "output_tokens",
        "input_cached_tokens",
        "input_audio_tokens",
        "output_audio_tokens",
        "num_model_requests",
        "project_id",
        "user_id",
        "api_key_id",
        "model",
        "batch",
    ]
]

# Display the DataFrame
df.head()

Data retrieved successfully!

	start_datetime	end_datetime	start_time	end_time	input_tokens	output_tokens	num_model_requests	project_id	user_id	api_key_id	model	batch
0	2025-01-11 17:31:39	2025-01-12	1736616699	1736640000	6897	97	97	proj_hNhhQzyYu7HxySZWs7cA3Ugu	None	None	gpt-4o-mini-2024-07-18	None
1	2025-01-11 17:31:39	2025-01-12	1736616699	1736640000	33984	206	95	proj_hNhhQzyYu7HxySZWs7cA3Ugu	None	None	ft:gpt-4o-2024-08-06:distillation-test:wordle2...	None
2	2025-01-11 17:31:39	2025-01-12	1736616699	1736640000	2846	8874	8	proj_hNhhQzyYu7HxySZWs7cA3Ugu	None	None	o1-mini-2024-09-12	None
3	2025-01-11 17:31:39	2025-01-12	1736616699	1736640000	97474	579	270	proj_hNhhQzyYu7HxySZWs7cA3Ugu	None	None	gpt-4o-2024-08-06	None
4	2025-01-12 00:00:00	2025-01-13	1736640000	1736726400	1989	28	28	proj_hNhhQzyYu7HxySZWs7cA3Ugu	None	None	gpt-4o-mini-2024-07-18	None

Parse the API Response into DataFrame and render a stacked bar chart

Now we will parse the JSON data, extract relevant fields, and create a pandas DataFrame for easier manipulation and analysis.

# Group data by model and project_id and aggregate model request counts
grouped_by_model_project = (
    df.groupby(["model", "project_id"])
    .agg(
        {
            "num_model_requests": "sum",
        }
    )
    .reset_index()
)

# Determine unique models and project IDs for plotting and color mapping
models = sorted(grouped_by_model_project["model"].unique())
project_ids = sorted(grouped_by_model_project["project_id"].unique())
distinct_colors = [
    "#1f77b4",
    "#ff7f0e",
    "#2ca02c",
    "#d62728",
    "#9467bd",
    "#8c564b",
    "#e377c2",
    "#7f7f7f",
    "#bcbd22",
    "#17becf",
]
project_color_mapping = {
    pid: distinct_colors[i % len(distinct_colors)] for i, pid in enumerate(project_ids)
}

# Calculate total number of requests per project_id for legend
project_totals = (
    grouped_by_model_project.groupby("project_id")["num_model_requests"]
    .sum()
    .sort_values(ascending=False)  # Sort by highest total first
)

# Set up bar positions
n_models = len(models)
bar_width = 0.6
x = np.arange(n_models)

plt.figure(figsize=(12, 6))

# Plot stacked bars for each model
for model_idx, model in enumerate(models):
    # Filter data for the current model
    model_data = grouped_by_model_project[grouped_by_model_project["model"] == model]

    bottom = 0
    # Stack segments for each project ID within the bars
    for _, row in model_data.iterrows():
        color = project_color_mapping[row["project_id"]]
        plt.bar(
            x[model_idx],
            row["num_model_requests"],
            width=bar_width,
            bottom=bottom,
            color=color,
        )
        bottom += row["num_model_requests"]

# Labeling and styling
plt.xlabel("Model")
plt.ylabel("Number of Model Requests")
plt.title("Total Model Requests by Model and Project ID Last 30 Days")
plt.xticks(x, models, rotation=45, ha="right")

# Create a sorted legend with totals
handles = [
    mpatches.Patch(color=project_color_mapping[pid], label=f"{pid} (Total: {total})")
    for pid, total in project_totals.items()
]
plt.legend(handles=handles, bbox_to_anchor=(1.05, 1), loc="upper left")

plt.tight_layout()
plt.show()

Visual Example: Model Distribution Pie Chart

This section visualizes the distribution of token usage across different models using a pie chart.

records = []
for bucket in all_group_data:
    for result in bucket.get("results", []):
        records.append(
            {
                "project_id": result.get("project_id", "N/A"),
                "num_model_requests": result.get("num_model_requests", 0),
            }
        )

# Create a DataFrame
df = pd.DataFrame(records)

# Aggregate data by project_id
grouped_by_project = (
    df.groupby("project_id").agg({"num_model_requests": "sum"}).reset_index()
)

# Visualize Pie Chart
if not grouped_by_project.empty:
    # Filter out rows where num_model_requests == 0
    filtered_grouped_by_project = grouped_by_project[
        grouped_by_project["num_model_requests"] > 0
    ]

    # Calculate the total model requests after filtering
    total_requests = filtered_grouped_by_project["num_model_requests"].sum()

    if total_requests > 0:
        # Calculate percentage of total for each project
        filtered_grouped_by_project["percentage"] = (
            filtered_grouped_by_project["num_model_requests"] / total_requests
        ) * 100

        # Separate "Other" projects (below 5%)
        other_projects = filtered_grouped_by_project[
            filtered_grouped_by_project["percentage"] < 5
        ]
        main_projects = filtered_grouped_by_project[
            filtered_grouped_by_project["percentage"] >= 5
        ]

        # Sum up "Other" projects
        if not other_projects.empty:
            other_row = pd.DataFrame(
                {
                    "project_id": ["Other"],
                    "num_model_requests": [other_projects["num_model_requests"].sum()],
                    "percentage": [other_projects["percentage"].sum()],
                }
            )
            filtered_grouped_by_project = pd.concat(
                [main_projects, other_row], ignore_index=True
            )

        # Sort by number of requests for better legend organization
        filtered_grouped_by_project = filtered_grouped_by_project.sort_values(
            by="num_model_requests", ascending=False
        )

        # Main pie chart for distribution of model requests by project_id
        plt.figure(figsize=(10, 8))
        plt.pie(
            filtered_grouped_by_project["num_model_requests"],
            labels=filtered_grouped_by_project["project_id"],
            autopct=lambda p: f"{p:.1f}%\n({int(p * total_requests / 100):,})",
            startangle=140,
            textprops={"fontsize": 10},
        )
        plt.title("Distribution of Model Requests by Project ID", fontsize=14)
        plt.axis("equal")  # Equal aspect ratio ensures pie chart is circular.
        plt.tight_layout()
        plt.show()

        # If there are "Other" projects, generate a second pie chart for breakdown
        if not other_projects.empty:
            other_total_requests = other_projects["num_model_requests"].sum()

            plt.figure(figsize=(10, 8))
            plt.pie(
                other_projects["num_model_requests"],
                labels=other_projects["project_id"],
                autopct=lambda p: f"{p:.1f}%\n({int(p * other_total_requests / 100):,})",
                startangle=140,
                textprops={"fontsize": 10},
            )
            plt.title('Breakdown of "Other" Projects by Model Requests', fontsize=14)
            plt.axis("equal")  # Equal aspect ratio ensures pie chart is circular.
            plt.tight_layout()
            plt.show()
    else:
        print("Total model requests is zero. Pie chart will not be rendered.")
else:
    print("No grouped data available for pie chart.")

Costs API Example

In this section, we'll work with the OpenAI Costs API to retrieve and visualize cost data. Similar to the completions data, we'll:

Call the Costs API to get aggregated cost data.
Parse the JSON response into a pandas DataFrame.
Visualize costs grouped by line item using a bar chart.

# Calculate start time: n days ago from now
days_ago = 30
start_time = int(time.time()) - (days_ago * 24 * 60 * 60)

# Define the Costs API endpoint
costs_url = "https://api.openai.com/v1/organization/costs"

costs_params = {
    "start_time": start_time,  # Required: Start time (Unix seconds)
    "bucket_width": "1d",  # Optional: Currently only '1d' is supported
    "limit": 30,  # Optional: Number of buckets to return
}

# Initialize an empty list to store all data
all_costs_data = get_data(costs_url, costs_params)

Data retrieved successfully!

print(json.dumps(all_costs_data, indent=2))

[
  {
    "object": "bucket",
    "start_time": 1736553600,
    "end_time": 1736640000,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.13080438340307526,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736640000,
    "end_time": 1736726400,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.12270423340307525,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736726400,
    "end_time": 1736812800,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 9.888144383403077,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736812800,
    "end_time": 1736899200,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.3507639334030752,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736899200,
    "end_time": 1736985600,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.2977481185324674,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1736985600,
    "end_time": 1737072000,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.00925485477848094,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1737072000,
    "end_time": 1737158400,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 8.889884136532304,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1737158400,
    "end_time": 1737244800,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 21.167310118127915,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
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    "results": [
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        "amount": {
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          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1737331200,
    "end_time": 1737417600,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.0003226181279184669,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1737417600,
    "end_time": 1737504000,
    "results": [
      {
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        "amount": {
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          "currency": "usd"
        },
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    "results": [
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    "results": [
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    "results": [
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    "results": [
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    "results": [
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    "results": [
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        "amount": {
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          "currency": "usd"
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        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
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    "results": [
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    "results": [
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    "results": [
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    "results": [
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      }
    ]
  },
  {
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    "results": [
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        "amount": {
          "value": 0.02677460744715549,
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        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
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    ]
  },
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    "results": [
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          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  },
  {
    "object": "bucket",
    "start_time": 1739145600,
    "end_time": 1739232000,
    "results": [
      {
        "object": "organization.costs.result",
        "amount": {
          "value": 0.00012073404268330895,
          "currency": "usd"
        },
        "line_item": null,
        "project_id": null,
        "organization_id": "org-GLHrIv00VVN9dEQC2b4wsBkf"
      }
    ]
  }
]

Parse the Costs API Response and Create a DataFrame

We will now parse the JSON data from the Costs API, extract relevant fields, and create a pandas DataFrame for further analysis.

# Initialize a list to hold parsed cost records
cost_records = []

# Extract bucketed cost data from all_costs_data
for bucket in all_costs_data:
    start_time = bucket.get("start_time")
    end_time = bucket.get("end_time")
    for result in bucket.get("results", []):
        cost_records.append(
            {
                "start_time": start_time,
                "end_time": end_time,
                "amount_value": result.get("amount", {}).get("value", 0),
                "currency": result.get("amount", {}).get("currency", "usd"),
                "line_item": result.get("line_item"),
                "project_id": result.get("project_id"),
            }
        )

# Create a DataFrame from the cost records
cost_df = pd.DataFrame(cost_records)

# Convert Unix timestamps to datetime for readability
cost_df["start_datetime"] = pd.to_datetime(cost_df["start_time"], unit="s")
cost_df["end_datetime"] = pd.to_datetime(cost_df["end_time"], unit="s")

# Display the first few rows of the DataFrame
cost_df.head()

	start_time	end_time	amount_value	currency	line_item	project_id	start_datetime	end_datetime
0	1736553600	1736640000	0.130804	usd	None	None	2025-01-11	2025-01-12
1	1736640000	1736726400	0.122704	usd	None	None	2025-01-12	2025-01-13
2	1736726400	1736812800	9.888144	usd	None	None	2025-01-13	2025-01-14
3	1736812800	1736899200	0.350764	usd	None	None	2025-01-14	2025-01-15
4	1736899200	1736985600	0.297748	usd	None	None	2025-01-15	2025-01-16

Visualize Total Costs per Day

We'll create a bar chart to visualize the total costs aggregated by day. This helps give a high level perspective on organizational spend.

if not cost_df.empty:
    # Ensure datetime conversion for 'start_datetime' column
    if (
        "start_datetime" not in cost_df.columns
        or not pd.api.types.is_datetime64_any_dtype(cost_df["start_datetime"])
    ):
        cost_df["start_datetime"] = pd.to_datetime(
            cost_df["start_time"], unit="s", errors="coerce"
        )

    # Create a new column for just the date part of 'start_datetime'
    cost_df["date"] = cost_df["start_datetime"].dt.date

    # Group by date and sum the amounts
    cost_per_day = cost_df.groupby("date")["amount_value"].sum().reset_index()

    # Plot the data
    plt.figure(figsize=(12, 6))
    plt.bar(
        cost_per_day["date"],
        cost_per_day["amount_value"],
        width=0.6,
        color="skyblue",
        alpha=0.8,
    )
    plt.xlabel("Date")
    plt.ylabel("Total Cost (USD)")
    plt.title("Total Cost per Day (Last 30 Days)")
    plt.xticks(rotation=45, ha="right")
    plt.tight_layout()
    plt.show()
else:
    print("No cost data available to plot.")

Visualize Costs by Line Item

We'll create a bar chart to visualize the total costs aggregated by line item. This helps identify which categories (e.g., models or other services) contribute most to the expenses.

days_ago = 30
start_time = int(time.time()) - (days_ago * 24 * 60 * 60)

costs_params = {
    "start_time": start_time,  # Required: Start time (Unix seconds)
    "bucket_width": "1d",  # Optional: Currently only '1d' is supported
    "limit": 30,  # Optional: Number of buckets to return
    "group_by": ["line_item"],
}

line_item_cost_data = get_data(costs_url, costs_params)

# Initialize a list to hold parsed cost records
cost_records = []

# Extract bucketed cost data from all_costs_data
for bucket in line_item_cost_data:
    start_time = bucket.get("start_time")
    end_time = bucket.get("end_time")
    for result in bucket.get("results", []):
        cost_records.append(
            {
                "start_time": start_time,
                "end_time": end_time,
                "amount_value": result.get("amount", {}).get("value", 0),
                "currency": result.get("amount", {}).get("currency", "usd"),
                "line_item": result.get("line_item"),
                "project_id": result.get("project_id"),
            }
        )

# Create a DataFrame from the cost records
cost_df = pd.DataFrame(cost_records)

# Convert Unix timestamps to datetime for readability
cost_df["start_datetime"] = pd.to_datetime(cost_df["start_time"], unit="s")
cost_df["end_datetime"] = pd.to_datetime(cost_df["end_time"], unit="s")

# Display the first few rows of the DataFrame
cost_df.head()

Data retrieved successfully!

	start_time	end_time	amount_value	currency	line_item	project_id	start_datetime	end_datetime
0	1736553600	1736640000	0.127440	usd	ft-gpt-4o-2024-08-06, input	proj_hNhhQzyYu7HxySZWs7cA3Ugu	2025-01-11	2025-01-12
1	1736553600	1736640000	0.003090	usd	ft-gpt-4o-2024-08-06, output	proj_hNhhQzyYu7HxySZWs7cA3Ugu	2025-01-11	2025-01-12
2	1736553600	1736640000	0.000271	usd	assistants api \| file search	proj_L67gOme4S2nBA8aQieEOwLy7	2025-01-11	2025-01-12
3	1736553600	1736640000	0.000003	usd	assistants api \| file search	proj_VV4ZAjd6ALfFd9uh0vY8joR1	2025-01-11	2025-01-12
4	1736640000	1736726400	0.028607	usd	evals \| gpt-4o-mini-2024-07-18, input	proj_L67gOme4S2nBA8aQieEOwLy7	2025-01-12	2025-01-13

if not cost_df.empty:
    # Ensure datetime conversion for 'start_datetime' column
    if "start_datetime" not in cost_df.columns or not pd.api.types.is_datetime64_any_dtype(cost_df["start_datetime"]):
        cost_df["start_datetime"] = pd.to_datetime(cost_df["start_time"], unit="s", errors="coerce")

    # Create a new column for just the date part of 'start_datetime'
    cost_df["date"] = cost_df["start_datetime"].dt.date

    # Group by date and line_item and sum the amounts
    cost_per_day = cost_df.groupby(["date", "line_item"])["amount_value"].sum().reset_index()

    # Pivot the DataFrame so each date has one bar with line_item stacks
    cost_pivot = cost_per_day.pivot(index="date", columns="line_item", values="amount_value").fillna(0)
    cost_pivot = cost_pivot.sort_index()

    # Plot a stacked bar chart with one bar for each grouped day
    plt.figure(figsize=(12, 6))
    ax = cost_pivot.plot(kind="bar", stacked=True, ax=plt.gca(), width=0.8)
    plt.xlabel("Date")
    plt.ylabel("Total Cost (USD)")
    plt.title("Total Cost by Line Item")
    plt.xticks(rotation=45, ha="right")
    # Update legend so it doesn't overlay the graph by placing it outside the plot area
    plt.legend(bbox_to_anchor=(1.05, 1), loc="upper left", borderaxespad=0.)
    plt.tight_layout()
    plt.show()
else:
    print("No cost data available to plot.")

/var/folders/r_/g8r2dz8s2qd104th5p5yxljr0000gp/T/ipykernel_49468/2813361465.py:25: UserWarning: Tight layout not applied. The bottom and top margins cannot be made large enough to accommodate all Axes decorations.
  plt.tight_layout()

Additional Visualizations (Optional)

You can extend this notebook with more visualizations for both the Completions and Costs APIs. For example:

Completions API:

Group by user, project, or model to see which ones consume the most tokens.
Create line plots for time series analysis of token usage over days or hours.
Use pie charts to visualize distribution of tokens across models, users, or projects.
Experiment with different group_by parameters (e.g., ["model", "user_id"]) to gain deeper insights.

Costs API:

Group by project or line item to identify spending patterns.
Create line or bar charts to visualize daily cost trends.
Use pie charts to show how costs are distributed across projects, services, or line items.
Try various group_by options (e.g., ["project_id"], ["line_item"]) for granular analysis.

Experiment with different parameters and visualization techniques using pandas and matplotlib (or libraries like Plotly/Bokeh) to gain deeper insights, and consider integrating these visualizations into interactive dashboards for real-time monitoring.

Integrating with Third-Party Dashboarding Platforms

To bring OpenAI usage and cost data into external dashboarding tools like Tableau, Power BI, or custom platforms (e.g., Plotly Dash, Bokeh), follow these steps:

Data Collection & Preparation:
- Use Python scripts to regularly fetch data from the Completions and Costs APIs.
- Process and aggregate the data with pandas, then store it in a database, data warehouse, or export it as CSV/JSON files.
Connecting to a Dashboard:
- BI Tools (Tableau, Power BI):
  - Connect directly to the prepared data source (SQL database, CSV files, or web APIs).
  - Use built-in connectors to schedule data refreshes, ensuring dashboards always display current information.
- Custom Dashboards (Plotly Dash, Bokeh):
  - Embed API calls and data processing into the dashboard code.
  - Build interactive visual components that automatically update as new data is fetched.
Real-Time & Automated Updates:
- Schedule scripts using cron jobs, task schedulers, or workflow tools (e.g., Apache Airflow) to refresh data periodically.
- Implement webhooks or streaming APIs (if available) for near real-time data updates.

By integrating API data into third-party platforms, you can create interactive, real-time dashboards that combine OpenAI metrics with other business data, offering comprehensive insights and automated monitoring.

Jan 14, 2025

How to use the Usage API and Cost API to monitor your OpenAI usage