Introducing GPT-5.5
A new class of intelligence for real work and powering agents, built to understand complex goals, use tools, check its work, and carry more tasks through to completion. It marks a new way of getting computer work done.
Now available in ChatGPT and Codex.
GPT-5.4 Thinking and GPT-5.4 Pro are rolling out now in ChatGPT.
GPT-5.4 is also now available in the API and Codex.
GPT-5.4 brings our advances in reasoning, coding, and agentic workflows into one frontier model.
“So often we fail to see ourselves clearly, leaning too far in the direction of pride or false humility. If one person mentions an attribute of yours as a virtue or a failing, consider it. If multiple people mention the same one, you’ve got a more concrete answer.”