OpenAI · model release
GPT-5.5
ChatGPT gets a smarter model that can carry out longer, messier tasks on a computer with less guidance.
In detail
OpenAI released GPT-5.5, which it called its smartest and most intuitive model yet, for real work such as coding, research, data analysis and operating software. GPT-5.5 and GPT-5.5 Pro reached the API on 24 April 2026.
Sources
- Introducing GPT-5.5 · OpenAI · Primary source
Last checked 11 November 2026.