# claude-mythos-5-1

Anthropic



Same specs/pricing as Fable 5.1 $10/$50 /MTok; Project Glasswing invite-only; always-on adaptive thinking; parameter count not disclosed by vendor


## Availability

Claude API claude-mythos-5-1 \(Project Glasswing invite-only\); Bedrock anthropic.claude-mythos-5-1; Google Cloud/Foundry claude-mythos-5-1
- Model released: Sep 01, 2026 · Date only

## Sources

- Source: https://platform.claude.com/docs/en/models/mythos-5-1/overview

Canonical entry: https://www.ailyre.com/source/?id=anthropic-claude-mythos-5-1&lang=en