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feat: support for azure open ai responses api (i.e. to use openai chat gpt o3 pro model) #5732
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Reference: github-starred/open-webui#5732
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Originally created by @kaeferpsd on GitHub (Jul 10, 2025).
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Problem Description
Open WebUI currently supports Azure OpenAI, including the GPT-4o model (gpt-4o), but OpenAI's gpt-4o variant "o3-pro" is not available via Azure OpenAI. This issue is to:
Document this limitation clearly
Plan support for o3-pro via Azure when/if Microsoft exposes it.
What works:
✅ Azure OpenAI integration (using /chat/completions)
✅ Models like:
gpt-4
gpt-4-32k
gpt-4o (regular Azure version, not o3-pro)
gpt-35-turbo
What doesn’t work:
❌ Model variant gpt-4o (o3-pro) as listed under model: "gpt-4o" from api.openai.com
ℹ️ Azure currently maps gpt-4o to the May 2024 release, not to o3-pro with function calling and JSON mode enhancements.
Why this matters:
Users expect the same behavior from gpt-4o on Azure as from api.openai.com
o3-pro adds enhanced tool support and function call reliability, which is important for Open WebUI workflows
If/when Azure exposes o3-pro, Open WebUI should allow specifying this model version (possibly via deployment name or tag)
Desired Solution you'd like
Suggestions:
Add a warning or note in Azure OpenAI setup if user tries to use gpt-4o expecting o3-pro capabilities
Track availability of o3-pro in Azure and document the required deployment setup once released
Alternatives Considered
No response
Additional Context
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