Fix: Allow reasoning_effort='none' for Azure gpt-5.1 models #17311
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PR BerriAI#17071 drops or errors on reasoning_effort='none' for all GPT models. It doesn't actually allow 'none' to be sent to Azure for gpt-5.1 which supports it according to Azure documentation. See: https://learn.microsoft.com/en-us/azure/ai-foundry/openai/how-to/reasoning "none is only supported for gpt-5.1"
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Sameerlite
reviewed
Dec 2, 2025
| "Azure OpenAI does not support reasoning_effort='none'. " | ||
| "Azure OpenAI does not support reasoning_effort='none' for this model. " | ||
| "Supported values are: 'low', 'medium', and 'high'. " | ||
| "Note: gpt-5.1 does support reasoning_effort='none'. " |
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Do we need this statement
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Optional. We could keep it or remove it, It informs users trying reasoning_effort='none' on unsupported models that gpt-5.1 is an alternative that does support it.
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Relevant issues & PRs
Fixes #17309, #17071
#17071
Pre-Submission checklist
tests/litellm/directorymake test-unitType
🐛 Bug Fix
Changes
Allow reasoning_effort='none' for Azure gpt-5.1 models.
Files Changed
Details
Azure documentation confirms reasoning_effort='none' is supported for gpt-5.1:
https://learn.microsoft.com/en-us/azure/ai-foundry/openai/how-to/reasoning
Test