Claude Fable 5.1

ANTHROPIC Developer Architecture Profile

OpenRouter ↗HuggingFace ↗

Intelligence (ELO)1497Chatbot Arena Verified

Max Context Limit1,000,000Max Out: 128,000 tokens

Prompt Caching98% OFF$0.25 / 1M cached

Standard API / 1M$60.00Blended Standard Rate

Model Capabilities & Contract SLAs

Agentic
Coding & Logic
Fictional
📋 Strict JSON Schema
🛠️ Native Tool Calling

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

Granular Pricing Matrix

Input Tokens (Standard Prompt)$10.00 / 1M

⚡ Cached Input (Prompt Cache Read)98% OFF$0.25 / 1M

Output Tokens (Completion)$50.00 / 1M

Pricing data via OpenRouter. Sync: 10/2/2026

Evaluate Competitors

VS Engine MatchupClaude Fable 5.1 vs OpenAI: GPT-6 Astra VS Engine MatchupClaude Fable 5.1 vs Google: Gemini 3.8 Flash VS Engine MatchupClaude Fable 5.1 vs OpenAI: GPT-6 Astra (batch)VS Engine MatchupClaude Fable 5.1 vs Google: Gemini 3.6 Flash (batch)VS Engine MatchupClaude Fable 5.1 vs Anthropic: Claude Fable 5 (batch)VS Engine MatchupClaude Fable 5.1 vs OpenAI: GPT-5 Image