ChangelogApril 25, 2026
GPT 5.5 in Bloom
OpenAI's most capable model is now powering your builds.
GPT 5.5 is OpenAI's smartest model yet, released April 23, 2026. It excels at complex, multi-step tasks like writing and debugging code, and can plan and execute end-to-end with minimal guidance. In Bloom, this means faster iteration, fewer errors, and apps that come together more reliably on the first try. It also uses significantly fewer tokens to complete the same tasks, so your credits go further.