OpenAI o1

OpenAI o1

AI that can do general-purpose complex reasoning

5.0•7 reviews•

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A new large language model trained with reinforcement learning to perform complex reasoning. o1 thinks before it answers—it can produce a long internal chain of thought before responding to the user.

OpenAI o1

Launch date
Codex by ChatGPT
Codex by ChatGPTCloud agent for parallel dev tasks, powered by Codex-1

Launched on May 17th, 2025

OpenAI o1
OpenAI o1AI that can do general-purpose complex reasoning

Launched on September 13th, 2024