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HTTP 206 Partial Content

The server is delivering only part of the resource, in response to a Range header — used for resumable downloads.

2xx · Success✗ not retryable — fix the request instead

In AI APIs specifically

Seen when resuming large model or file downloads (e.g. fine-tune result files).

Fix checklist

  • Verify your Range arithmetic when stitching chunks.
  • Fall back to a full GET if ranges are unsupported.

Spec: RFC reference

Related status codes

200 OK

The request succeeded.

201 Created

The request succeeded and a new resource was created — typical for POSTs that create files, fine-tune jobs or batch jobs..

202 Accepted

The request was accepted for asynchronous processing but is not complete.

204 No Content

Success with no response body — common for DELETE operations..

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