Models / openai / GPT-5.5 Pro (2026-04-23)

GPT-5.5 Pro (2026-04-23)

JSON →
openaimultimodal

A dated snapshot of GPT-5.5 Pro, providing a stable version for enterprise reproducibility.

textimagetool-usejson-modevisionstreamingreasoningcode-generationfunction-callingprompt-caching
homepage ↗docs ↗
Specs
Context & limits
1M
context window
128K
max output
Lifecycle
Dates
released2026-04-23
knowledge cutoff2026-01-01
Resources
homepagehttps://openai.com/gpt-5 ↗
docshttps://platform.openai.com/docs/models/gpt-5 ↗