OpenAI · OpenAI (GPT / ChatGPT)
GPT-5.4 mini
ActiveReleased 3 months ago· Mar 17, 2026Multimodal model
Mid-tier cost-sensitive model; significant upgrade over GPT-4o mini. 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.
Part of the OpenAI (GPT / ChatGPT) version timeline. Catch Me Up — everything that changed across AI & smart home ↗