Model previewCritical global significanceConfirmed confidence
Anthropic opens Claude Mythos Preview to Project Glasswing partners
Anthropic opened Claude Mythos Preview to a screened set of Project Glasswing partners for finding and fixing critical software vulnerabilities.
What happened
Event details
Anthropic positions Mythos Preview as a general-purpose frontier model and released it as a controlled research preview to roughly 50 initial partners, highlighting its ability to identify, reproduce, and fix software vulnerabilities.
Assessment
Why it matters
The restricted rollout illustrates the partner-access path used for a strong cyber-capable model before any public release.
88/100Global significance score. Regional effects are recorded only when the evidence supports a meaningful difference.
Availability
Access notes
This was not a public release; access was limited to screened Project Glasswing partners.