OpenAI · OpenAI (GPT / ChatGPT)
GPT-5.4 mini
ActiveMid-tier cost-sensitive model; significant upgrade over GPT-4o mini. Available to free ChatGPT users.
About this version
GPT‑5.4 mini is an active, fast‑tier model in the ChatGPT family released on 17 March 2026 with a knowledge cutoff of 1 December 2025 and a 128 000‑token context window. It is positioned as a mid‑tier, cost‑sensitive offering that represents a significant upgrade over GPT‑4o mini and is available to free ChatGPT users.
- API string
- gpt-5.4-mini
- Context window
- 128K ctx
- Knowledge cutoff
- Dec 1, 2025
- Tier
- Fast
- Released
- Mar 17, 2026
Release & change timeline
1 event- Release
GPT-5.4 mini released
Mid-tier model available to free ChatGPT users.
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