Anthropic: Claude Fable 5
★ Elite9.6
/ 10
Anthropic Claude Fable 5 is a Mythos-class model optimized for autonomous knowledge work and coding. It accepts text, image, and file inputs with text output, supports reasoning, structured outputs, and tool use, with a 1M-token context window and 128K max output tokens.
Specifications
| Attribute | Value |
|---|---|
| Lab | Anthropic |
| Tags | Intelligent Coding Reasoning Agentic |
| Overall Score | 9.6/10 |
| Release Date | 2026-06 |
| Context Window | 1,000,000 tokens |
| Input Price / 1M | $10.00 |
| Output Price / 1M | $50.00 |
| Input Modalities | Text, Image, File |
| Output Modalities | Text |
Strengths
- Built for autonomous agentic workflows with native tool use and structured outputs
- 1M-token context window enables long-horizon tasks
- Strong reasoning capabilities with verifiable chain-of-thought
- Multimodal input: text, images, and files
- Competitive pricing at $10/$50 per million tokens
Weaknesses
- Mythos-class is a new model tier with limited third-party benchmarks
- Priced above mid-tier models for non-agentic workloads
Best For
- Autonomous coding agents and complex software engineering
- Long-context knowledge work and research synthesis
- Multi-step tool-use workflows
- Reasoning-heavy analytical tasks
Sources & Further Reading
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Scores are aggregated from public benchmarks (MMLU, HumanEval, MATH, GSM8K, LMSYS) and normalized to a 1–10 scale. Methodology →