Claude Mythos Preview Timeline
A chronological record of key events related to Anthropic's Claude Mythos Preview model and Project Glasswing.
CMS Misconfiguration Leaks Internal Documents
Approximately 3,000 unpublished Anthropic assets become publicly accessible, revealing references to "Capybara" and "Mythos" codenames.
Anthropic Announces Claude Mythos Preview
Official announcement of the model and launch of Project Glasswing with 12 founding partners for defensive cybersecurity.
System Card Published
Anthropic releases the Mythos Preview system card detailing capabilities including zero-day discovery and autonomous exploit development.
12 Founding Partners Confirmed
AWS, Apple, Broadcom, Cisco, CrowdStrike, Google, JPMorgan Chase, Linux Foundation, Microsoft, NVIDIA, and Palo Alto Networks confirmed.
Pentagon Designates Anthropic "Supply-Chain Risk"
The U.S. Department of Defense formally labels Anthropic a supply-chain risk following a contract dispute.
NSA Confirmed Using Mythos for Cyber Defense
Despite Pentagon concerns, reports confirm the NSA is actively using Claude Mythos Preview for defensive cybersecurity operations.
Claude Opus 4.7 Released to Public
Anthropic releases Claude Opus 4.7 for general availability — improved reasoning and engineering, but without Mythos-level cybersecurity capabilities.
Unauthorized Access Reports Emerge
Bloomberg reports unauthorized access to Mythos Preview via a third-party contractor environment. Anthropic opens investigation.