GPT-5.1
2 models2025Up to 262K ctx
About
OpenAI's GPT-5.1 family released November 2025, featuring adaptive reasoning with dynamically adjustable thinking effort. Includes a general thinking model and a code-specialized Codex variant. Deprecated in ChatGPT as of March 11, 2026.
Specifications(2 models)
| Model | Released | Context | Multimodal | Reasoning | Fn Calling | Tool Use |
|---|---|---|---|---|---|---|
| GPT-5.1 Codex | 2025-11 | — | Yes | Yes | Yes | Yes |
Frequently Asked Questions
- What is GPT-5.1?
- OpenAI's GPT-5.1 family released November 2025, featuring adaptive reasoning with dynamically adjustable thinking effort. Includes a general thinking model and a code-specialized Codex variant. Deprecated in ChatGPT as of March 11, 2026.
- How many models are in the GPT-5.1 family?
- The GPT-5.1 family contains 2 models.
- What is the latest GPT-5.1 model?
- The latest model is GPT-5.1 Codex, released in 2025-11.
