Claude Mythos 5
Last verified September 7, 2026 · Anthropic pricing ↗$10.00/1M input · $50.00/1M output · 1.0M context · Anthropic
Limited access
Not generally available
Claude Mythos 5 is not on Anthropic’s open price list. Access is gated to vetted partners or a waitlist, so the rate below is what those customers pay rather than something you can sign up for. It is excluded from the calculator’s default model list and from every ranking.
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Pricing Details
AnthropicSame model as Fable 5 with safeguards lifted. Access restricted to vetted partners via Project Glasswing. Not generally available. Strongest cybersecurity capabilities of any model per Anthropic.
Input / 1M tokens
$10
Output / 1M tokens
$50
Context Window
1.0M
Max Output
128K
Price History
No price change recorded since 2026-07-24, when this site started tracking this model; it launched on 2026-06-09.
Frequently Asked Questions
Common questions about Claude Mythos 5 pricing and usage
Read More About Claude Mythos 5
Three labs shipped a security-gated model in three days. Anthropic published a full rate card for one its own cyber programme cannot sell you yet, Google published no number at all, and OpenAI published a pointer.
September 5, 2026 · 12 min read
The US gated its two newest flagships in a day. The models you can still call are open weights.
June 29, 2026 · 8 min read