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OpenAI: o3 Deep Research

openai/o3-deep-research

Released Oct 10, 2025200,000 context
$10/M input tokens$40/M output tokens$10/K web search

o3-deep-research is OpenAI's advanced model for deep research, designed to tackle complex, multi-step research tasks.

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

Recent activity on o3 Deep Research

Total usage per day on OpenRouter

Prompt
1.28M
Reasoning
536K
Completion
130K

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