After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too

The story
OpenAI will begin rolling out its cybersecurity testing tool, GPT-5.5 Cyber only "to critical cyber defenders" at first.
From the source
After Sam Altman trash-talked Anthropic for gatekeeping its cybersecurity tool Mythos by only releasing it to select users, he confirmed that OpenAI would be doing the same with its competing tool, Cyber.
Who and what
Key names and topics in this story: After, Anthropic, Mythos, OpenAI.
Where to follow next
- Read the full piece at techcrunch.com
- More from our AI & prompts coverage
Related stories

Elon Musk s 7 biggest stumbles on the stand at OpenAI trial
Elon Musk spent three days testifying as the first witness in his trial against OpenAI.
Why the families of Tumbler Ridge shooting victims may face 'difficult' issues with OpenAI lawsuits - CBC
Why the families of Tumbler Ridge shooting victims may face 'difficult' issues with OpenAI lawsuits CBC

Sources: Anthropic potential $900B+ valuation round could happen within 2 weeks
Anthropic is asking investors to submit allocations for the AI company’s latest fundraise within the next 48 hours, according to sources familiar with the matter.

Elon Musk testifies that xAI trained Grok on OpenAI models
"Distillation" is a hot topic as frontier labs try to prevent smaller competitors from copying their models.