OpenAI unveils Daybreak to preemptively secure code with multi-model AI

TL;DR
OpenAI unveils Daybreak, a multi-model security initiative that maps potential attack paths in code using Codex Security AI and higher‑risk-vulnerability detection with GPT‑5.5 variants, aiming to patch flaws before attackers exploit them and signaling a strategy that follows Anthropic's Claude Mythos while collaborating with industry and government partners.
- OpenAI just released its answer to Claude Mythos The Verge
- OpenAI to give EU access to new cyber model but Anthropic still holding out on Mythos CNBC
- Scaling Trusted Access for Cyber with GPT-5.5 and GPT-5.5-Cyber OpenAI
- EU says OpenAI offers to open access to cybersecurity model, Anthropic not there yet Reuters
- OpenAI offers EU access to new AI hacking model politico.eu
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