Fable 5
#32 in Coding AgentsScale Ai · v5 · since 9. Juni 2026 (Claude Fable 5, Anthropic) · 2× · last seen Sep 13, 2026
14
Momentum
IMPORTANT NOTE: Research showed that "Fable 5" is not a standalone Scale AI product but the codename for "Claude Fable 5," an AI model developed by Anthropic. Scale AI only operates independent benchmark leaderboards (e.g., labs.scale.com, SWE-bench Pro) on which Fable 5 appears as one of several evaluated models — it is not a coding-agent product built or marketed by Scale AI. The data below therefore refers to Claude Fable 5 (Anthropic), since no official Scale AI product page exists under this name.
Momentum trend
15.06.13.09.
Features
| Base Model | Standalone Anthropic model of the 'Mythos class' (first publicly available Mythos variant), positioned above Claude Opus |
| Platform | Claude API, AWS Bedrock, Google Vertex AI, Microsoft Foundry |
| Price | $10 per million input tokens / $50 per million output tokens (Fable 5.1: same pricing, cache reads $0.25/million) |
| Release Date | June 9, 2026 |
| Interface (IDE/CLI/Web) | Claude API, Claude Code (CLI), Claude Apps, plus IDE integrations such as GitHub Copilot |
| SWE-bench Verified (%) | Not officially stated by Anthropic; independent source cites 95.0% (as of August 2026, partly self-reported) |