Mythos allegedly surfaces on Claude Code day after Anthropic denies public release plans

Mythos allegedly surfaces on Claude Code day after Anthropic denies public release plans

Users briefly reported seeing Mythos 1 on Claude Code and Claude Security after Anthropic limited access to selected partners. The appearance suggested testing for a wider rollout, though the company removed the traces and still says stronger safeguards are needed.

Anthropic Claude Code Leak Raises Concerns Over AI-Driven Cybersecurity Risks

Anthropic's Claude Code leak sparks AI security concerns as experts warn attackers may gain new advantages in cyber threats.

Claude Mythos 1 and Opus 4.8 Leak Online — Anthropic May Be Preparing Its Biggest AI Upgrade Yet

New leaks suggest Anthropic is getting ready to launch multiple next-generation AI systems, including the mysterious Claude Mythos 1 and an upgraded Claude Opus 4.8 model. The unreleased models recently appeared across several backend systems and internal UI references, hinting that Anthropic could be entering the final stages of rollout testing. Claude Mythos 1 Preview […]