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Say hello to GPT-5.4—our new model that brings our advances in reasoning, coding, and agentic workflows into one frontier model. GPT‑5.4 is our most capable and efficient frontier model for professional work. It incorporates the industry-leading coding capabilities of GPT‑5.3‑Codex⁠ while improving how the model works across tools, software environments, and professional tasks involving spreadsheets, presentations, and documents. 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 steer its direction mid-response. In Codex and the API, GPT-5.4 is the first general purpose model we’ve released with native, state-of-the-art computer-use capabilities. It supports up to 1M tokens of context and is our most token efficient reasoning model yet. GPT-5.4 Thinking and Pro are rolling out gradually starting today across ChatGPT, the API, and Codex. Steering is available this week on Android and web. iOS coming soon.