> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ActivityItem

## Fields

| Field                  | Type    | Required             | Description                                         | Example                              |
| ---------------------- | ------- | -------------------- | --------------------------------------------------- | ------------------------------------ |
| `byok_usage_inference` | *float* | :heavy\_check\_mark: | BYOK inference cost in USD (external credits spent) | 0.012                                |
| `completion_tokens`    | *int*   | :heavy\_check\_mark: | Total completion tokens generated                   | 125                                  |
| `date_`                | *str*   | :heavy\_check\_mark: | Date of the activity (YYYY-MM-DD format)            | 2025-08-24                           |
| `endpoint_id`          | *str*   | :heavy\_check\_mark: | Unique identifier for the endpoint                  | 550e8400-e29b-41d4-a716-446655440000 |
| `model`                | *str*   | :heavy\_check\_mark: | Model slug (e.g., "openai/gpt-4.1")                 | openai/gpt-4.1                       |
| `model_permaslug`      | *str*   | :heavy\_check\_mark: | Model permaslug (e.g., "openai/gpt-4.1-2025-04-14") | openai/gpt-4.1-2025-04-14            |
| `prompt_tokens`        | *int*   | :heavy\_check\_mark: | Total prompt tokens used                            | 50                                   |
| `provider_name`        | *str*   | :heavy\_check\_mark: | Name of the provider serving this endpoint          | OpenAI                               |
| `reasoning_tokens`     | *int*   | :heavy\_check\_mark: | Total reasoning tokens used                         | 25                                   |
| `requests`             | *int*   | :heavy\_check\_mark: | Number of requests made                             | 5                                    |
| `usage`                | *float* | :heavy\_check\_mark: | Total cost in USD (OpenRouter credits spent)        | 0.015                                |