Anthropic Mythos 1
By Anthropic
Released: 2026-06-02
Mythos 1 is the full release of Anthropic's specialised, security-focused system, graduating from the guarded Claude Mythos Preview. Built around Project Glasswing, it pairs frontier reasoning with defensive security tooling - vulnerability analysis, triage and incident response - deployed with heavy oversight and auditability. It runs alongside the general-purpose Claude family rather than replacing it.
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Fast & Efficient
Optimized performance ensures quick results without compromising on quality.
Purpose-Built
Specifically designed for llms tasks and workflows.
Anthropic Model Timeline
Long-context context
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200k tokens context
1,000k tokens context
200k tokens context
200k tokens context
200k tokens context
200k tokens context
200k tokens context
Specifications
AI Evaluation
A specialised defensive-security system most teams will not need - but for security organisations and platform providers, it operationalises Project Glasswing with serious reasoning depth and guardrails.
Pros
- Deep technical/security reasoning
- Auditable, contained deployment
- Defensive-first framing
Cons
- Not a general-purpose model
- Targeted access, not consumer-facing
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