Claude Fable 5

anthropic

Cross-checked

S
Coding Index
114.18
Coding tier
S
Context
1,000,000
Input Price
$10
per 1M tokens
Output Price
$50
per 1M tokens

DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps. Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.

OpenRouter quote 2026-10-11

Capabilities & Recommended Uses

Strengths

  • •Highest coding benchmark score
  • •Adaptive reasoning with Opus fallback
  • •Top-tier architecture design
  • •Best for complex coding tasks

Best For

  • •Complex architecture
  • •Multi-file refactoring
  • •Claude Code
  • •Code review

Weaknesses

  • •Most expensive
  • •Slower than non-reasoning models
Benchmark evidence and ranking method · Claude Fable 5

Cross-checked

Terminal-Bench 4.0 · Claude Code · max: 44.55% · 95% CI ± 3.85%

Artificial Analysis · Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Test configuration: max

Terminal-Bench 2.1: 84.64% · SciCode: 61.00%

LiveBench · 2026-06-25 · claude-fable-5-max-effort

Coding: 85.99% · Agentic Coding: 62.17%

ModelRank assigns editorial tiers using public coding evidence, not automatic index thresholds or statistically proven classes. Price, speed, context size and sponsorship do not affect tiers.

DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps.

Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.

Data checked: 2026-09-10. Snapshot date is the retrieval date, not necessarily the evaluation date.

Compare with Alternatives

Claude Fable 5 vs Claude Opus 5 (S) → Claude Fable 5 vs GPT-5.6 Sol (S) → Claude Fable 5 vs GPT-6 Astra (S) → Claude Fable 5 vs Kimi K3 (S) →

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Frequently Asked Questions

What is Claude Fable 5's coding score and ranking tier?

Claude Fable 5 by anthropic is rated as Tier S on ModelRank with a coding score of 114.18 (Reference baseline = 100) as a reference index derived from public benchmark evidence. Tiers are editorial assessments; the index does not establish real-world capability differences.

What is the API pricing and context window for Claude Fable 5?

Claude Fable 5 features a 1,000,000 token context window. Pricing is $10 per 1M input tokens and $50 per 1M output tokens (OpenRouter quote).

What programming tasks is Claude Fable 5 best suited for?

Claude Fable 5 is recommended for: Complex architecture, Multi-file refactoring, Claude Code, Code review. Key strengths include: Highest coding benchmark score, Adaptive reasoning with Opus fallback, Top-tier architecture design, Best for complex coding tasks.

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Last updated: October 11, 2026