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What AI models does ChatGPT Deep Research use?
ChatGPT Deep Research runs on Deep Research (OpenAI), GPT-5.2 Thinking (OpenAI), gpt-5.6 (OpenAI), GPT-6 (OpenAI), gpt-6-astra (OpenAI), GPT-Live-1 (OpenAI), o3 (optimized version) (OpenAI) and o4-mini (lightweight version) (OpenAI), and routes requests between them.
- Models used
- 8
- Primary model
- GPT-5.2 Thinking
- Public API
- Yes
- Last checked
- 2026-11-08
Model claims are labelled by how we know them: Deep Research — inferred, GPT-5.2 Thinking — disclosed, gpt-5.6 — disclosed, GPT-6 — inferred, gpt-6-astra — disclosed, GPT-Live-1 — inferred, o3 (optimized version) — disclosed and o4-mini (lightweight version) — disclosed. "Disclosed" means the vendor says so in public; "inferred" means it was derived from documentation, headers or release notes.
Context window: 196K tokens.
Other stack signals: OpenAI SDK, TypeScript SDK and Terraform provider.
Cite this answer
Tomorrow. “What AI models does ChatGPT Deep Research use?” Tomorrow AI & Emerging Tech Index, AlienSquad, updated 2026-11-08. https://tomorrow.aliensquad.ai/q/what-models-does-deep-research-use
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