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OpenAI: o4 Mini Deep Research

openai/o4-mini-deep-research

Created Oct 10, 2025200,000 context
$2/M input tokens$8/M output tokens$10/K web search

o4-mini-deep-research is OpenAI's faster, more affordable deep research model—ideal for tackling complex, multi-step research tasks.

Note: This model always uses the 'web_search' tool which adds additional cost.

Recent activity on o4 Mini Deep Research

Total usage per day on OpenRouter

Prompt
9.75M
Reasoning
2.72M
Completion
811K

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.