OpenAI Expands Daybreak With GPT-5.5-Cyber to Help Defenders Patch Security Flaws

OpenAI on Monday said it’s releasing an improved version of its GPT‑5.5‑Cyber model to trusted defenders as part of the Daybreak initiative, the artificial intelligence (AI) company announced last month.

Calling GPT‑5.5‑Cyber its “strongest model yet for finding and helping patch software vulnerabilities,” OpenAI said the model can “sustain deeper analysis across large codebases” to identify

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