OpenAI Releases GPT-5.4 Mini and Nano
GPT-5.4 Mini & Nano
- Release Date
- 2026-03-17
- Mini Availability
- ChatGPT, Codex, API
- Nano Availability
- API
- Mini Context Window
- 400k tokens
- Mini Speed vs GPT-5 mini
- >2x faster
OpenAI released GPT-5.4 mini and nano on March 17, 2026. GPT-5.4 mini is available in ChatGPT, Codex, and the API, optimized for coding, computer use, multimodal understanding, and subagents, and runs more than 2x faster than GPT-5 mini. GPT-5.4 nano is available in the API for high-speed, low-cost tasks.