OpenAI · OpenAI (GPT / ChatGPT)
GPT-5.4 nano
ActiveCheapest model with GPT-5-generation capability; API-only, for classification/routing/bulk processing ($0.10/$0.40 per 1M).
About this version
GPT‑5.4 nano is the active “fast” tier variant of OpenAI’s ChatGPT family released on 1 March 2026, offering a 128 000‑token context window and a knowledge cutoff of 1 December 2025. It provides GPT‑5‑generation capability in an API‑only format aimed at classification, routing, and bulk processing tasks, positioned as the most inexpensive model in its generation with usage pricing of $0.10/$0.40 per million tokens.
- API string
- gpt-5.4-nano
- Context window
- 128K ctx
- Knowledge cutoff
- Dec 1, 2025
- Tier
- Fast
- Released
- Mar 1, 2026
Release & change timeline
1 event- Release
GPT-5.4 nano released
Cheapest GPT-5-generation model; API-only.
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