Endpoints

Generation lookup

Look up the cost, token counts, provider and metadata of a past request with GET /generation, using the generation id from the response.

Look up the details of a past request (its exact cost, token counts, provider, latency and finish reason) by its generation id. Useful for reconciling bills, auditing streamed requests and debugging slow calls.

GET https://api14.com/api/v1/generation?id={generation_id}

Where to find the id

The id field of a chat completion, completion or response (gen-...).
The X-Generation-Id response header, when present.
The id in the first chunk of a stream.
The Usage page of your dashboard.

Request

Query parameter	Required	Description
`id`	yes	The generation id.

curl "https://api14.com/api/v1/generation?id=gen-1791100000-abc123" \
  -H "Authorization: Bearer sk-api14-..."

You can only look up generations made by your own account. Any other id (or an id that was never logged) returns 404 not_found.

Response

The body is the generation record:

{
  "data": {
    "id": "gen-1791100000-abc123",
    "model": "anthropic/claude-sonnet-4.5",
    "created_at": "2026-10-04T09:12:44Z",
    "provider_name": "Anthropic",
    "streamed": true,
    "finish_reason": "stop",
    "tokens_prompt": 1250,
    "tokens_completion": 340,
    "native_tokens_prompt": 1310,
    "native_tokens_completion": 352,
    "native_tokens_reasoning": 0,
    "native_tokens_cached": 1024,
    "latency": 412,
    "generation_time": 3810,
    "total_cost": 0.00918
  }
}

Field	Description
`total_cost`	The amount debited from your balance, in USD.
`native_tokens_*`	Token counts from the provider's own tokenizer, these are what you are billed for.
`native_tokens_cached`	Prompt tokens served from cache. See Prompt caching.
`latency` / `generation_time`	Time to first token and total generation time, in ms.

Cost

total_cost (and usage.cost in the original response) is your charge for the request, the same amount shown on the Usage page. See Pricing & billing.

Timing

The record can take a few seconds to appear after a request finishes. If you get a 404 right after a request, retry after a short delay.

Errors

Status	Code	When
401	`invalid_api_key`	Missing or invalid key.
404	`not_found`	The id is unknown or belongs to another account.
502	`upstream_unavailable`	The record could not be fetched; retry.

See Errors.