OpenAI will begin rolling out its cybersecurity testing tool, GPT-5.5 Cyber only "to critical cyber defenders" at first.
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Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that…
Security researchers at Mozilla say Anthropic's Mythos has unearthed a wealth of high-severity bugs in Firefox.
OpenAI's agentic coding tool has gotten a major makeover, with a variety of new powers and abilities.
OpenAI said the damage was limited to the employees’ devices, and did not affect user data nor its production systems, and none…
Mythos and GPT-5.5 add to cybersecurity worries that OpenAI and Anthropic had already sparked with AI coding's popularity.
GPT-5.5 Cyber tops the CyberGym leaderboard as Anthropic's best models sit offline under a Trump administration export ban.
