GPT-5 Pro
JSON →The flagship reasoning model in the GPT-5 family, optimized for complex multi-step tasks and deep analysis.
Specs
context window 128K tokens
max output 272K tokens
input price $15 / 1M tokens
output price $120 / 1M tokens
Capabilities
reasoningtool-usejson-modestreamingcode-generationfunction-callingprompt-cachingvision
Dates
releasedOct 2025
knowledge cutoffApr 2025
Resources
API
full doc /v1/models/gpt-5-pro