ModelClock
Release announced
Released on Mar 17, 2026
OpenAI announced this model on 2026-03-17. API: v1/responses · API: v1/chat/completions.
- Hosting route
- First-party API
- Affected scope
- API: v1/responses · API: v1/chat/completions
- Announced
- Mar 17, 2026
- First seen by ModelClock
- Oct 3, 2026
What the provider published
developers.openai.com ↗Released GPT-5.4 mini and GPT-5.4 nano to the Chat Completions and Responses API.
Read from the provider's text; the quote is the provider's exact lines.
