Retired Jul 2026
o4-mini-deep-research
A cost-efficient o4-mini variant, released June 2025, fine-tuned for autonomous research with capabilities similar to o3-deep-research.
Key Specifications
- Context window
- 200K tokens
- Max output
- 100K tokens
- Knowledge cutoff
- web search available
- Released
- Inputs
- Text, image
- Capabilities Show details
- Reasoning Thinks before it answers, always on or as a switchable mode. Web search Search the web for up-to-date information. Code execution Write and execute code in a sandboxed environment. File upload Process uploaded documents, spreadsheets, and other files. MCP Connect to services via Model Context Protocol.
Frequently Asked Questions
What is o4-mini-deep-research good for?
Autonomous research tasks that search and synthesize web and private sources: it was the lighter of OpenAI's two deep research models.
When is o4-mini-deep-research not a good fit?
Anything new: OpenAI retired it in July 2026. It had no function calling or structured output, took no audio or video input, and its knowledge is dated.
Can I self-host o4-mini-deep-research?
No. OpenAI does not publish the weights; o4-mini-deep-research is available only through hosted APIs.
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