GPT-5.5 Is Open For Community Testing

April 24, 2026

OpenAI's GPT-5.5 is in your model picker this week. It's a frontier-tier option for deep reasoning, coding, long-context work, and tool-heavy agent runs — and you can use it on any plan while community testing is open.

What's new

• GPT-5.5 is selectable from the frontier section of the model picker.
• 1.05M-token context window — pasting in a full document set, a sprawling codebase, or a long research thread is in scope.
• Reasoning mode and Alfrada's full tool surface both work with it.

Heads up

While community testing is open, GPT-5.5 bills at a 12× token multiplier. It'll burn through your monthly budget faster than the workhorse models — fine for the prompts that need a frontier brain, expensive if you leave it picked for everything.