Claude Fable 5 API Pricing & Cost Calculator
Fable 5 belongs in the 'use only when Opus 5 isn't enough' tier. At double Opus 5's rates it only earns its keep on the hardest agentic chains, where the 90% cache discount can still bail you out.
Claude Fable 5 is Anthropic's most expensive reasoning tier, sitting above Opus 5 in their lineup. It targets the hardest multi-step agentic chains where Opus 5 still occasionally stalls.
By TechCompare · Updated
Calculator
Cost Comparison
Based on 100,000 input tokens (50% cached), 5,000 output tokens, and 100 requests.
How this is calculated
Claude Fable 5 is priced at $10.00 per million input tokens and $50.00 per million output tokens - double Claude Opus 5's rate. It supports a 90% prompt caching discount ($1.00 per million cached reads) and a 50% batch discount ($5.00 per million inputs, $25.00 per million outputs) via Anthropic's Message Batches API.
Verdict
Fable 5 belongs in the 'use only when Opus 5 isn't enough' tier. At double Opus 5's rates it only earns its keep on the hardest agentic chains, where the 90% cache discount can still bail you out.
More API Standalones scenarios
Frequently asked questions
Is Claude Fable 5 worth it over Claude Opus 5?
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