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OpenAI
Deep research (ChatGPT)
Launched Feb 2, 2025
An agent in ChatGPT that does multi-step internet research for 5-30 minutes and returns a cited report.
- Surface
- App
- Availability
- Generally available
- Plans
- Free, Plus, Pro, Team, Enterprise, Edu
- Retired
- —
Strengths & weaknesses
Strengths
- Cites specific passages
- Connect to MCP/apps and restrict to trusted sites (2026-02-10)
Weaknesses
- Pro only with 100 queries/month at launch
- Can hallucinate and is poorly calibrated on uncertainty (per OpenAI)
Powered by a version of o3 optimised for browsing; not mapped to the o3 id because the post describes a distinct fine-tune. Plus access 2025-02-25; Free (5/month) by April 2025. Legacy deep research mode deprecation notice 2026-03-19.