GPT-5.4 brings advances in reasoning, coding, and agentic workflows into one frontier model.

GPT-5.4 is also now available in the API and Codex.

GPT-5.4 is OpenAi's most factual and efficient model: fewer tokens, faster speed.

In ChatGPT, GPT-5.4 Thinking has improved deep web research, better context retention when it thinks for longer—and oh—you can now interrupt the model and add instructions or adjust its direction mid-response.

Steering is available this week on Android and web. iOS coming soon.

GPT-5.4 Thinking and Pro are rolling out gradually starting today across ChatGPT, the API, and Codex.

Source: OpenAi