# GPT-5.4 Mini spotted on OpenAI

GPT-5.4 Mini is a model from OpenAI, released on 17 Mar 2026. First seen 14 Oct 2026. Catalogues list a 400,000 tokens context window. 4 evidence links.

- Kind: Sighting
- Developer: OpenAI
- Confidence: Confirmed
- First seen: 2026-10-14T21:10:40.359Z
- Model: [GPT-5.4 Mini](https://alexgetman.com/models/openai/gpt-5-4-mini/)
- Canonical: https://alexgetman.com/signals/2026/10/14/gpt-5-4-mini-high/

## Evidence links

- [OpenAI · pricing](https://developers.openai.com/api/docs/pricing)
- [Arena · leaderboards](https://openai.com/index/introducing-gpt-5-4-mini-and-nano/)
- [OpenAI · model index](https://developers.openai.com/api/docs/models/gpt-5.4-mini)
- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)