Dossier
critical cyber defenders
Coverage of critical cyber defenders in the Nexus archive.
- After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too
OpenAI has started restricting access to its cybersecurity testing tool, GPT-5.5 Cyber, limiting it to 'critical cyber defenders' initially. This move follows OpenAI's criticism of Anthropic for restricting access to its own tool, Mythos.