Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
Anthropic: Claude Fable 5 — Anthropic. Context window 1,000,000 tokens. API pricing (per 1M tokens): Input $10, Output $50. License: Proprietary. LMArena 1,492. GPQA Diamond 85.9%.
| Provider | Anthropic |
|---|---|
| API model ID | anthropic/claude-fable-5 |
| Tier | Frontier |
| Context window | 1,000,000 tokens |
| Max output | 128,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $10 |
| API pricing (per 1M tokens) · Output | $50 |
| LMArena | 1,492 (claude-fable-5-high) |
| GPQA Diamond | 85.9% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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