Weโre excited to introduce GPTโ5.5, our smartest and most intuitive to use model yet, and the next step toward a new way of getting work done on a computer. GPT-5.5 is now available in the API, Codex, and ChatGPT. GPTโ5.5 understands what youโre trying to do faster and can carry more of the work itself. It also uses significantly fewer tokens to complete the same tasks, making it more efficient as well as more capable. To get the most out of GPT-5.5 in the API, check out our API prompt guide and migration guide, or use the command: [$openai-docs migrate this project to gpt-5.5] to kick off a plan to migrate your API integration via Codex.