We’re currently using the Assistants API, and since yesterday we’ve been experiencing a serious issue where streamed responses are getting cut off mid-reply. This problem is causing significant inconvenience for our customers, yet there has been no acknowledgement or incident report from OpenAI. Wh…

Hello! This should be resolved shortly - thank you all for your patience. [image] “Premature close” when sending messages to Assistants API threads? Bugs Hi everyone, sorry about this disruption. We increased the timeout on the backend so you shouldn't see thi…

We are facing the same problem and this can also be reproduced in the openai api platform - and when generating a longer response. with assitant api and model gpt-4.1 [image]

I am experiencing the same streaming issue described here, both in my own applications and when using the Assistants Playground on the OpenAI platform. In my tests, streamed responses almost always stop mid-reply when a request takes more than roughly 15 seconds, while responses that complete in und…

Stream Interruptions Occurring During Assistants API Responses

API

OpenAI_Support November 26, 2025, 10:39pm 4

Hello! This should be resolved shortly - thank you all for your patience.

Topic		Replies	Views
[Assistants API] Issue with gpt-4o: httpx.RemoteProtocolError: peer closed connection without sending complete message body (incomplete chunked read) API assistants-api , gpt-4o	12	800	November 26, 2025
Assistants API Streaming Connection Closure Issue Bugs bug , error , assistants-api , streaming	5	415	November 26, 2025
Error Internal Server Error: The response ended prematurely. (ResponseEnded) API gpt-4 , bug , assistants-api	2	636	November 26, 2025
“Premature close” when sending messages to Assistants API threads? Bugs assistants-api	9	874	December 3, 2025
Assistants API unstable/flaky? Bugs gpt-4 , assistants-api	8	1354	February 18, 2024

Stream Interruptions Occurring During Assistants API Responses

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