GPT-5.1 (2025-11-13)
JSON →A dated snapshot of the GPT-5.1 model released on November 13, 2025.
Specs
context window 272K tokens
max output 128K tokens
input price $1.25 / 1M tokens
output price $10 / 1M tokens
Capabilities
tool-usejson-modevisionprompt-cachingstreamingreasoningcode-generationfunction-calling
Dates
releasedNov 2025
knowledge cutoffSep 2025
Resources
API
full doc /v1/models/gpt-5.1-2025-11-13