GPT-5.1

GPT-5.1
DeveloperOpenAI
Initial releaseNovember 12, 2025 (2025-11-12)
Included with
PredecessorGPT-5
SuccessorGPT-5.2
Type
LicenseProprietary
Websiteopenai.com/index/gpt-5-1/

GPT-5.1 is a family of four large language models within OpenAI's GPT series. Two were released on November 12, 2025; two more were released one week later on November 19.

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