claude-fable-5-1

Anthropicclaude-fable-5-1

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 code generation, and finance and analysis tasks in particular. It also tends to be more concise than Fable 5 in its plans and summaries. We recommend testing it as a direct upgrade wherever you use Fable 5 today, and alongside Opus 5 on reasoning-heavy tasks.

API Pricing

Price typeBilling expression
Official price
Base pricingPricing tier: base
  • Input usage × $10.00
  • Output usage × $50.00
  • Cached read × $0.25
  • Cache creation × $12.50
  • Cache creation (1 hour) × $20.00
Claude_Pro×0.880% of official list price
Base pricingPricing tier: base
  • Input usage × $8.00
  • Output usage × $40.00
  • Cached read × $0.20
  • Cache creation × $10.00
  • Cache creation (1 hour) × $16.00

Group multiplier: x0.8

Claude_Ultra×0.990% of official list price
Base pricingPricing tier: base
  • Input usage × $9.00
  • Output usage × $45.00
  • Cached read × $0.23
  • Cache creation × $11.25
  • Cache creation (1 hour) × $18.00

Group multiplier: x0.9

Official pricing is subject to the model provider's latest published pricing and may vary by request method or service region. Claude_Pro, Claude_Ultra — TokenByte channel pricing. Actual prices and availability reflect current platform data.

Model information

Model providerAnthropic
Model IDclaude-fable-5-1
Context window1000000
InputTextImage
OutputText

Frequently asked questions

01

What is Claude Fable 5.1?

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 code generation, and finance and analysis tasks in particular. It also tends to be more concise than Fable 5 in its plans and summaries.
02

How much does Claude Fable 5.1 cost?

Claude Fable 5.1 costs $10.00/M input tokens and $50.00/M output tokens, with separate rates for Cache Read at $0.25/M tokens, Cache Write at $12.50/M tokens, and Cache Write (1h) at $20.00/M tokens.
03

What is the context length of Claude Fable 5.1?

Claude Fable 5.1 has a 1,000,000 token context window. It supports up to 128,000 completion tokens.