(3) OpenAI on X: "GPT-5.4 mini is available today in ChatGPT, Codex, and the API. Optimized for coding, computer use, multimodal understanding, and subagents. And it’s 2x faster than GPT-5 mini. https://t.co/DKh2cC5S3F https://t.co/sirArgn37L" / X
GPT-5.4 mini is available today in ChatGPT, Codex, and the API.