OpenAI Releases GPT-5.4 Thinking and Pro
GPT-5.4 Details
- Release Date
- 2026-03-05
- Availability
- ChatGPT (Thinking, Pro), API, Codex
- Context Window
- 1M tokens (Codex/API)
- Key Features
- Mid-response steering, native computer use, improved research
OpenAI released GPT-5.4 on March 5, 2026, making it available as Thinking and Pro variants in ChatGPT, along with the API and Codex. The model features a 1M token context window in Codex and API, improved factual accuracy and efficiency, and native computer-use capabilities. GPT-5.4 Thinking introduces mid-response steering, rolling out first on Android and web.