Claude Fable 5.1
Parameters
-
Context Length
1M
Modality
Multimodal
Architecture
Dense
License
-
Release Date
-
Knowledge Cutoff
-
Evaluation Benchmarks
Rank
#3
| Benchmark | Score | Rank |
|---|---|---|
General max | 0.83 | 🥇 1 |
Coding max | 0.86 | 🥇 1 |
Reasoning max | 0.92 | 🥇 1 |
Agentic Coding max | 0.66 | 🥇 1 |
Mathematics max | 0.97 | 🥇 1 |
LiveBench Average max | 0.83 | 🥇 1 |
Data Analysis max | 0.80 | ⭐ 4 |
Rankings
Overall Rank
#3 🥉
Coding Rank
#11
About Claude Fable 5.1
Claude Fable 5.1 is an advanced multimodal reasoning and agentic model by Anthropic, offering improvements across coding, long-running agent workflows, and knowledge tasks. It features a 1M token context window tailored for extensive codebase refactoring and visual analysis.
Technical Specifications
Detailed architecture specifications are limited for proprietary models.
About Claude Fable 5
Anthropic's Claude Fable 5 generation, released June 9, 2026, shares a unified frontier architecture with Mythos 5, incorporating advanced safety classifiers for cybersecurity, biology, and chemistry, with fallback routing to Claude Opus 4.8.