OpenAI announced GPT-5.5, its latest AI model that is better at coding, using computers and pursuing deeper research ...
OpenAI is rolling out GPT-5.5 in Codex, with a 400K context window and higher coding benchmark scores than GPT-5.4.
GPT-5.5 brings a shift toward agentic behaviour, meaning it can plan, execute, and refine tasks with limited user guidance.