Chasing Next
Log inWork with meStart for Free
All Updates
OpenAIapi
April 24, 2026·Source

GPT-5.5 in the API

GPT-5.5 and GPT-5.5 Pro are now available to developers through the OpenAI API.

Details

  • GPT-5.5 is priced at $5 per million input tokens and $30 per million output tokens, double GPT-5.4
  • GPT-5.5 Pro is priced at $30 per million input tokens and $180 per million output tokens

Best for

developers building tools and agents that need OpenAI's newest agentic model

When to use it

you want to wire GPT-5.5's long-task and tool-use behavior into your own product or workflow

Who benefits

developers on the OpenAI API

More from OpenAI

All updates
api
Decisions API (Generally Available)
api
OpenAI Models on Google Cloud (Private Preview)
api
12-Hour Prompt Caching

Join the newsletter to get ahead with AI.

I share strategies, new modules, free guides, and tools to get you better at using AI in your work.

Leading a team? See team programs →