GPT-5.5
JSON →A large language model from OpenAI, part of the GPT-5 series, offering advanced reasoning and multimodal capabilities.
Specs
context window 1.1M tokens
max output 128K tokens
input price $5 / 1M tokens
output price $30 / 1M tokens
Capabilities
tool-usejson-modevisionstreamingreasoningcode-generationfunction-callingprompt-caching
Dates
releasedApr 2026
knowledge cutoffJan 2026
Resources
API
full doc /v1/models/gpt-5.5