Anthropic
Claude Mythos 5
v5 · frontier · Released June 9, 2026
Updated June 27, 2026
Reinstated June 27 for Project Glasswing members only (~100 orgs). No general enterprise access. Selection criteria not published.
Enterprise guidance
Mythos 5 is available exclusively to organizations in the Project Glasswing cohort — a restricted set of national security and critical infrastructure operators. Before attempting any API access, confirm your organization is on the approved list through official Anthropic enterprise channels. Non-approved access attempts will be rejected. If you believe your organization qualifies, contact Anthropic directly; there is no public application process.
Active Compliance Flags2
Access controlled by US Commerce Dept. Only Project Glasswing members approved. No published selection criteria or appeal process.
Primary source →Export license required for organizations not on the approved Glasswing list.
Primary source →Data handling
Default data retention
Governed by individual Glasswing member agreement
Zero-retention available
YesVia: Governed by Glasswing member agreement terms
API data used for training
NoAnthropic does not train on enterprise API customer data.
GDPR Data Processing Agreement
AvailableHIPAA Business Associate Agreement
Not availablePrimarily a national security model — HIPAA use cases are unlikely to qualify for Glasswing access.
Data residency options
US-based; governed by Glasswing member agreement
Vendor compliance certifications
Key use restrictions
- —Access: Glasswing member organizations only — no general enterprise procurement pathway
- —Prohibited: autonomous weapons systems development
- —Prohibited: domestic surveillance applications
- —No public AUP — restrictions are governed by individual Glasswing member agreements
- —Non-eligible organizations: contact Anthropic enterprise team to inquire about access pathways
Safety documentation
No public safety documentation available for Mythos 5. Safety evaluations exist but are restricted to approved Glasswing members. Lack of public transparency is a primary criticism from AI governance advocates and researchers.
Related governance resources
Governance controls
National Security and Dual-Use AI Risk Assessment
Establish a risk assessment process for AI systems and AI research activities that could constitute dual-use technology — with applications in both commercial and national security or weapons contexts — addressing BIS export control obligations, ITAR compliance for defense applications, dual-use research of concern protocols, and foreign adversarial misuse monitoring.
AI Vendor Due Diligence
Assess AI vendors against security, governance, and compliance criteria before procurement and at defined intervals during the vendor relationship.
Vendor Safety Commitment Verification
Establish a workflow to verify that AI vendors are honoring their published safety commitments, voluntary pledges, and contractual safety obligations on an ongoing basis — not only at the time of procurement.
AI Vendor Concentration Risk Assessment
Assess and manage the risk arising from organizational dependence on a small number of AI vendors or underlying model providers, and maintain a documented supplier redundancy posture to ensure operational continuity if a primary vendor is disrupted, suspends access, or becomes unavailable.
Procurement-Stage AI Governance Conditions
Establish governance preconditions that must be satisfied before AI system procurement is completed, including binding contractual commitments to governance standards, whistleblowing policy requirements, and internal approval workflow triggers that make governance a dependency of procurement rather than a post-hoc addition.
Playbook guides
How do we ensure third-party AI vendors meet our standards?
Extending vendor due diligence to cover model transparency, data handling, bias testing, and contractual liability for AI outputs.
What are our obligations under emerging AI regulations?
Tracking the EU AI Act, U.S. executive orders, SEC guidance, and sector-specific rules to understand what AI compliance actually requires.
Status history
June 12, 2026· green to red
US Commerce Department export control directive suspended all access.
June 27, 2026· red to yellow
Partial reinstatement for Project Glasswing members. General access remains suspended.
