Claude Fable 5.1

by Anthropic

Claude Fable 5.1 improves on Fable 5 most in coding agents, long-running tasks, front-end generation, and analysis work. Its plans and summaries also tend to be shorter. Try it as a replacement for Fable 5, or use it alongside Opus 5 for tasks that need more reasoning.

Best for: Coding agents, front-end work, and research-heavy tasks.

262K context

Text
Reasoning
Tool use

Try it in the playground

Pricing

USD per 1M tokens.

Window	Input	Cached input	Output
asap	$10.00	$0.25	$50.00

What one request costs

Prompt24Ktokens

Cached prefix17Ktokens

Reply2Ktokens

$0.1512

per request to Claude Fable 5.1

Prompt: 47.6%
Cached: 2.8%
Reply: 49.6%

The same request, across other models