TLDR Tech / AI
OpenAI launches GPT-5.4 mini and GPT-5.4 nano on APIs
OpenAI has released GPT-5.4 mini and GPT-5.4 nano. GPT-5.4 mini is live on the API, Codex, and ChatGPT, while the nano model is reserved for API users only. Both models are designed for workflows where response time shapes the product. GPT-5.4 mini is priced at $0.75 per million input tokens and $4.50 per million output tokens, while GPT-5.4 nano lands at $0.20 and $1.25.
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