OpenAI's GPT-5.5-Cyber scores 85.6% on CyberGym and opens Daybreak to an 8-nation government tier

OpenAI updated GPT-5.5-Cyber to 85.6% on the CyberGym benchmark — up from 81.8% for the base GPT-5.5 — and launched the Daybreak Cyber Partner Program, which lets security vendors embed the model in commercial products with expanded permissions for authorized vulnerability research. The structural move is the government tier: eight nations including Japan and Korea supply attack-taxonomy training data in exchange for priority Daybreak access, making GPT-5.5-Cyber the first major commercial LLM with state-level threat intelligence feeding its offensive-security capability.

Source: axios.com ↗