What is Claude Mythos?

Claude Mythos is a highly restricted AI model from Anthropic designed for advanced computer security tasks. The model has recently appeared inside public Anthropic products, suggesting a broader release may be imminent .

Anthropic previously described Mythos as a frontier AI system with unusually strong cyber capabilities. According to the company, the model significantly outperforms Claude Opus 4.7 in code reasoning and autonomous security-related work .

Recent Sightings

  • Mythos Toggle in Claude Code: Users reportedly noticed a temporary Mythos toggle inside Claude Code
  • References in Claude Security: Mythos references found inside Claude Security
  • Preview Model Name: Appeared under the name "claude-mythos-1-preview"

Controversy and Security Concerns

Anthropic expressed concern that Mythos could help develop functional cyberattacks and accelerate vulnerability exploitation in ways existing public AI systems cannot. The company believes unrestricted access could allow malicious actors to target unpatched vulnerabilities in widely used software and infrastructure .

Because of these risks, Anthropic previously delayed any broad public release of Mythos until stronger safeguards and monitoring systems became available .

Glasswing Project

Anthropic is also developing a separate security initiative known as Glasswing. The project reportedly uses the unreleased Claude Mythos Preview model to help organizations identify and patch AI-driven security threats before attackers can exploit them .

Security Capabilities

  • Autonomous vulnerability discovery and exploitation
  • Advanced code reasoning for security analysis
  • Patch generation for identified vulnerabilities
  • Defense against AI-driven cyberattacks

Expected Availability

Anthropic has not confirmed whether Mythos will become available to all Claude subscribers or remain restricted to enterprise, research, or security-focused customers .

Pricing

Not yet announced — likely enterprise or restricted access pricing.

Pros

  • Superior to Claude Opus 4.7 in security tasks
  • Autonomous vulnerability discovery and patching
  • Part of Glasswing security initiative
  • Frontier AI for cybersecurity
  • Strong safeguards expected at launch

Cons

  • Powerful capabilities raise dual-use concerns
  • Likely restricted access (not for general public)
  • Pricing and availability unclear
  • Security risks if safeguards fail

Who Should Use It?

Perfect for: Enterprise security teams, cybersecurity researchers, and organizations needing advanced AI for vulnerability discovery and patch management.

Verdict

Claude Mythos represents a new category of AI — powerful enough to find and fix vulnerabilities autonomously, but dangerous enough to require careful restriction. Recent appearances in public tools suggest release is near .

Rating: N/A (Pre-release) - Imminent launch expected.