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OpenAI

Is GPT-5.5 Pro out? Yes, since April 24, 2026

Yes. GPT-5.5 Pro has been available since April 24, 2026, when it was first listed in the OpenRouter catalogue.

A browser notification for each confirmed release in this family. No account or email.

Lab
OpenAI
Family
GPT
Release date
Source
OpenRouter catalogue

What changed

  • context 1.05M tokens · Context window of GPT-5.5 Pro. GPT-5.4 Pro is the previous model of the same tier, but the gap is beyond what a percentage explains.
  • price $30.00 / MTok · Prompt price of GPT-5.5 Pro. GPT-5.4 Pro is the previous model of the same tier, but the gap is beyond what a percentage explains.

About GPT-5.5 Pro

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

Next GPT model to watch

Questions

When was GPT-5.5 Pro released?
GPT-5.5 Pro has been available since April 24, 2026, when it was first listed in the OpenRouter catalogue.
Who makes GPT-5.5 Pro?
GPT-5.5 Pro is made by OpenAI.
What comes after GPT-5.5 Pro?
GPT-5.6 Sol, released on July 9, 2026.