GPT-5.4-Cyber
Notable release: A meaningful new model: a new size or version, or a strong free-to-download model from a known lab.
Key facts
- Released
- Apr 14, 2026
- What it does
- Text and chat: Writes, answers questions and holds a conversation.Code: Writes, explains and fixes code.
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- How
- Limited access (waitlist or partners)
- Announced as
- “Trusted access for the next era of cyber defense”
From trckr's archive of releases before it started watching. Date and details from Epoch AI's database of AI models (CC BY 4.0).
Compare GPT-5.4-Cyber with
It came out 28 days after GPT-5.4 Nano, the lab's previous model.
The details
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