File Uploads not working since recent update

API
1

Hello,

we are experiencing intermittent failures with the Upload API.

The same requests sometimes succeed and sometimes fail with a generic server error.

Symptoms

  • POST /uploads intermittently fails

  • POST /uploads/{id}/parts intermittently fails

  • identical requests succeed when retried seconds later

  • failures return the generic error:

The server had an error processing your request.
request_id: req_xxxxxxxxxxxxxxxxx

Observed behavior

Example sequence:

  1. POST /uploads → success → upload_id returned

  2. POST /uploads/{upload_id}/parts → error

  3. retry same request → success

  4. later: POST /uploads itself fails with same server error

We also had a situation where the parts could be uploaded, but upload completion failed.

This suggests instability in the upload service rather than request validation issues.

Additional context

  • We are using raw HTTP, not an SDK

  • Requests previously worked reliably until recently

  • The same code works reliably with Azure OpenAI

  • Multiple endpoints in the upload workflow appear affected

Example request IDs

  • req_5f141e096d194c51b4bf51878a2d01be
  • req_d0c588293bab4484bea7b015ed68a278
  • req_9c68280e76ba4e1785bd41235f96408a
  • req_cadc64cf66c84b518d668d89c84a6e52

Question

Is there currently an incident or regression affecting the Upload API?