OpenAI launches Daybreak to take on Anthropic’s Mythos in cyber defence


The new platform pairs GPT-5.5 variants with Codex Security and a roster of enterprise security partners, all aimed at defenders. OpenAI has unveiled Daybreak, a cybersecurity initiative aimed at finding software vulnerabilities, generating patches, and validating fixes inside enterprise codebases. The launch positions OpenAI directly against Anthropic’s Mythos, which has spent the past few months […]



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