# GPT-5.5-Cyber

GPT-5.5-Cyber is an AI model released by OpenAI on Jun 22 2026. At release it scored 85.6% on CyberGym.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-5.5-Cyber |
| Developer | OpenAI |
| Release date | Monday, Jun 22 2026 |
| Licensing | Proprietary |

## Benchmark scores published at release

| Benchmark | Score | What it measures |
| --- | --- | --- |
| CyberGym | 85.6% | Tests the AI on cybersecurity challenges — finding and exploiting software weaknesses inside a safe sandbox. Higher is better. |

## About GPT-5.5-Cyber

GPT-5.5-Cyber, announced June 22, 2026, was OpenAI's first cybersecurity-specialised model and the anchor of Daybreak, the vetted-access program for security defenders that OpenAI had introduced a month earlier. Trained to find, validate, and help patch software vulnerabilities across large codebases, it scored 85.6% on CyberGym at release, against the 81.8% posted by the general-purpose GPT-5.5.

The model never shipped to the public API — access ran through Daybreak's identity checks and monitoring, a template Google followed a month later with Gemini 3.5 Flash Cyber. Alongside the model, OpenAI and Trail of Bits launched Patch the Planet, which put the model to work on open-source projects including cURL and NATS Server. GPT-5.6-Cyber succeeded it in August 2026.

## Questions and answers

### When was GPT-5.5-Cyber released?

GPT-5.5-Cyber was released by OpenAI on Monday, Jun 22 2026.

### Who made GPT-5.5-Cyber?

GPT-5.5-Cyber was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### What benchmark scores did GPT-5.5-Cyber get?

GPT-5.5-Cyber reports 1 tracked benchmark score — CyberGym: 85.6%. Scores are the figures published at release by OpenAI. It holds the best score among all models tracked here on CyberGym.

### Is GPT-5.5-Cyber open source?

No. GPT-5.5-Cyber is a proprietary 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-5.5-Cyber?

OpenAI's previous tracked release was GPT-5.5-Pro on Apr 23 2026, 60 days earlier. It was followed by GPT-5.6 Sol on Jun 26 2026.


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Canonical page: https://aireleasetracker.com/model/openai/gpt-5.5-cyber
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Benchmark scores are the figures published by the releasing lab at launch.