# Introducing GPT-Daybreak to accelerate defenders

GPT-5.6-Cyber completes 95% of advanced cybersecurity requests, up from 1.5% for GPT-5.6 Sol, and found CVE-2026-15903 in Chrome's V8.

- Daybreak Blue offers GPT-5.6 Sol with guardrails removed for defensive work; Daybreak Red offers purpose-trained cyber models.
- GPT-5.6-Cyber found CVE-2026-15903, a high-severity V8 vulnerability, plus 400+ kernel privilege-escalation flaws.
- Individual Daybreak accounts must adopt hardware security keys starting September 1, 2026.
- Access is available to approved individuals and organizations via openai.com/daybreak/partners.

## Why it matters

Security researchers and defenders can now run authorized vulnerability research and exploit development with far fewer refusals, accelerating defensive work that earlier models blocked.

## Sources

- [OpenAI: Introducing GPT-Daybreak to accelerate defenders](https://openai.com/index/accelerating-defenders-with-gpt-daybreak-legacy)

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Summarized by dstilled on 2026-08-05. https://dstilled.ai/story/3a5b1aae-6a8b-4e9e-aac2-b3e64b33e880