The Azure OpenAI Assistants API currently does not support the o3-mini model. Unfortunately, there is no provided ETA for when or if this support will be added.
You can request the feature in OpenAI feedback forum for PG's attention.
Regarding the integration of these models into Azure's Assistants API, there is no official announcement yet. You can keep an eye on the Azure OpenAI Service release notes for updates. The What's new in Azure OpenAI Service will be updated accordingly with more details on the availability of o3-mini model in the Assistants API.
Reference thread: o3-mini not supporting Assistants
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