# GPT-5.4 Cyber

GPT-5.4 Cyber is an AI model released by OpenAI on Apr 14 2026.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-5.4 Cyber |
| Developer | OpenAI |
| Release date | Tuesday, Apr 14 2026 |
| Licensing | Closed |

## About GPT-5.4 Cyber

OpenAI announced GPT-5.4 Cyber on April 14, 2026, alongside an expansion of its Trusted Access for Cyber program. The model was trained to answer a wider range of requests from verified defenders.

Access depended on verification and the customer’s program tier. OpenAI retired the first-party API endpoint on October 1, 2026.

## Questions and answers

### When was GPT-5.4 Cyber released?

GPT-5.4 Cyber was released by OpenAI on Tuesday, Apr 14 2026.

### Who made GPT-5.4 Cyber?

GPT-5.4 Cyber was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### Is GPT-5.4 Cyber open source?

No. GPT-5.4 Cyber is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after GPT-5.4 Cyber?

OpenAI's previous tracked release was GPT-5.4 nano on Mar 17 2026, 28 days earlier. It was followed by GPT-5.5 on Apr 23 2026.


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Canonical page: https://aireleasetracker.com/model/openai/gpt-5.4-cyber
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.