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Models
OpenAI's reasoning-model line, introduced publicly with o1-preview in 2024.
The o1 launch helped make reasoning models a central competitive category in frontier AI.
Each fact carries its own source note. Draft and source-check labels mean the item should not be treated as a finished reference entry.
OpenAI announced o1-preview on September 12, 2024.[1]
OpenAI framed o1-preview as a model designed to spend more time thinking before responding.[1]
In current AI product language, agents are commonly framed around models using tools to carry out multi-step work.[2][1]
Published 2024-09-12. Retrieved 2026-06-06.
First public reasoning model in the o1 line.
Published 2025-02-24. Retrieved 2026-06-06.
Anthropic introduced Claude Code as a command-line tool for agentic coding alongside Claude 3.7 Sonnet.