OpenAI Launches Daybreak to Compete with Claude Mythos in Cyber Defense
TL;DR Summary
OpenAI has launched Daybreak, a cybersecurity initiative that embeds defense into software from the start, using GPT-5.5 and Codex Security to triage, patch, and validate vulnerabilities with audit-ready evidence; aimed at rivaling Anthropic's Claude Mythos, it teams with partners like Cloudflare, Cisco, CloudStrike, Palo Alto Networks, Oracle and Akamai, and builds on Mythos' earlier patching success.
- Daybreak Is OpenAI's Response To Anthropic's Claude Mythos Engadget
- 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
- OpenAI rolls out advanced AI cyber model to challenge Anthropic’s Mythos Politico
- EU says OpenAI offers to open access to cybersecurity model, Anthropic not there yet Reuters
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