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OpenAI rolls out new model for cybersecurity teams a month after Anthropic's Mythos debut

CNBC · May 7, 2026, 10:06 PM · Also reported by 3 other sources

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  • The preview of GPT-5.5-Cyber is not intended to be a major step up in terms of cyber capability, but is instead trained to be more permissive on security-related tasks, OpenAI said in a blog post.
  • With the cyber-specific version, vetted teams will have an easier time using OpenAI's latest model for workflows like vulnerability identification and triage, patch validation and malware analysis, the company said.

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Open AI on Thursday announced that GPT-5.5-Cyber, a variation of its latest artificial intelligence model, is rolling out in a limited preview capacity to vetted cybersecurity teams, a month after rival Anthropic captivated investors and government officials with Claude Mythos Preview.

The preview of GPT-5.5-Cyber is not intended to be a major step up in terms of cyber capability, but is instead trained to be more permissive on security-related tasks, OpenAI said in a blog post. OpenAI announced GPT-5.5 late last month.

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