Models / openai / GPT-5.1 Chat Latest

GPT-5.1 Chat Latest

JSON →
openaillm

The latest chat-optimized version of GPT-5.1, automatically updated to the newest stable snapshot.

textimageaudiotool-usejson-modevisionprompt-cachingstreamingreasoningcode-generationfunction-calling
homepage ↗docs ↗
Specs
Context & limits
128K
context window
16K
max output
Lifecycle
Dates
released2025-11-13
knowledge cutoff2025-09-01
Resources
homepagehttps://platform.openai.com/docs/models/gpt-5.1 ↗
docshttps://platform.openai.com/docs/api-reference/chat ↗