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Anthropic Claude Fable 5.1 API pricing

Token prices on OpenRouter and at the provider’s list price, and what your own workload would cost per month.

Input
$10.00
Output
$50.00
Cached input
$0.25

OpenRouter, per 1M tokens. A dash means no listed price.

Your monthly cost

Your workload

90M input and 18M output tokens a month (30-day month; token counts are per request).

Assumes: 1,000 conversations a day, each sending about 3,000 tokens of history and instructions and receiving about 600 tokens of replies.

Input not in cache
$900
Output
$900
Total per month
$1,800
Per day
$60.00
Per request
$0.06
Unit
Currency

The share you mark as “from cache” is billed at this model’s published cache-read price. Cache-write charges are not included. Compare this bill with other models.

Every price, with its source

OpenRouter price, per 1M tokens

Input
$10.00
Output
$50.00
Cached input (read)98% below the input price
$0.25
Cache write
$12.50
Batch (input / output)
$5.00 / $25.00
Context window
1,000,000 tokens
Maximum output
128,000 tokens
Accepts
text, image, file
Reasoning mode
yes
Intelligence Indexby Artificial Analysis, relayed by OpenRouter
53.4
Listed since
1 Sep 2026

Provider list price, per 1M tokens

Input / output
$10.00 / $50.00
Cached input (read)
$0.25
Batch (input / output)
$5.00 / $25.00

As recorded in the LiteLLM price table under claude-fable-5-1, which cites the provider’s pricing page. It matches the OpenRouter price.

Collected from the OpenRouter models API (466 entries). 99 models are cross-checked against provider list prices in the LiteLLM price table.

About 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...

Description supplied by OpenRouter. Model id for the API: anthropic/claude-fable-5.1

Other Anthropic models

Questions and answers

How much does Anthropic Claude Fable 5.1 cost per million tokens?

At the collection of 3 Oct 2026, 08:40 UTC, OpenRouter listed Anthropic Claude Fable 5.1 at $10.00 per million input tokens and $50.00 per million output tokens. The provider list price recorded by LiteLLM is $10.00 for input and $50.00 for output.

What would Anthropic Claude Fable 5.1 cost per month?

For 1,000 requests a day with 3,000 input and 600 output tokens each, over a 30-day month and with no caching, the bill is $1,800. Change the numbers in the simulator on this page to match your own traffic.

Does Anthropic Claude Fable 5.1 have a cheaper price for cached input?

Yes. Cached input is listed at $0.25 per million tokens, 98% below the normal input price.

What is the context window of Anthropic Claude Fable 5.1?

1,000,000 tokens, with a maximum output of 128,000 tokens, as reported by OpenRouter.

Is there a batch price for Anthropic Claude Fable 5.1?

Yes. OpenRouter lists a batch variant at $5.00 per million input tokens and $25.00 per million output tokens, for requests that can wait for an asynchronous answer.

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