OpenAI's newest model matches GPT-5.4's speed while outperforming it on nearly every benchmark. It's rolling out to paid ChatGPT users today.
Purpose-built tools, self-service APIs, and workflows make it faster and easier to build, extend, and scale on the ...
OpenAI's GPT-5.5 boosts agentic coding, reduces costs, and handles complex tasks with minimal input across business and ...