OpenAI Releases GPT-5.5 and GPT-5.5 Pro
GPT-5.5 Availability
- Platforms
- ChatGPT, Codex
- User Tiers
- Plus, Pro, Business, Enterprise
- Release Date
- 2026-04-23
OpenAI released GPT-5.5, rolling out to Plus, Pro, Business, and Enterprise users across ChatGPT and Codex. The model matches GPT-5.4 latency while improving performance across evaluations and using fewer tokens for tasks. GPT-5.5 Pro was also introduced for Pro, Business, and Enterprise ChatGPT users.