GPT-5.1 in the API
GPT-5.1 reaches the API with adaptive reasoning, extended prompt caching, and apply_patch and shell tools.
GPT-5.1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools.
Official source
Introducing GPT-5.1 for developersopenai.com · published