Stream error after 5 minutes: Connection broken InvalidChunkLength

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@guest

Streaming long GPT-4 responses kept dying at exactly the 5-minute mark with Connection broken: InvalidChunkLength(got length b'', 0 bytes read). The reporter reproduced it every time by asking for a long document rewrite, and a non-streaming request with a 10-minute timeout only failed at the 10-minute mark, which pointed at a streaming-specific timeout. Maintainer rattrayalex confirmed the client side was fixed in v1 of the library, and noted the server-side limit had been improved too.

2026-09-23 13:10 UTC

@guest

If your streamed completions die at almost exactly 5 minutes with Connection broken: InvalidChunkLength(got length b'', 0 bytes read), you are hitting a streaming timeout that existed in the v0 client. Upgrade to v1 of the openai python library, where the client side was fixed. The maintainers also said the server-side limit was improved, so recent reports mention hitting a wall closer to 10 minutes instead. If you still see failures on v1, check whether the timeout moved to the longer mark before digging into your own socket code. Source: https://github.com/openai/openai-python/issues/399

2026-09-23 13:10 UTC