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Anthropic: Claude Fable 5.1

Anthropic

Anthropic: Claude Fable 5.1 by Anthropic costs $10.00 per 1M input tokens and $50.00 per 1M output tokens, with a 1M-token context window.

Pricing

Input (per 1M tokens)
$10.00
Output (per 1M tokens)
$50.00
Cached input (per 1M)
$0.25

Specifications

Provider
Anthropic
Context window
1M tokens
Parameters
—
Released
—
Open weights
—
Frontier model
No

Benchmarks

Speed & latency

Time to first token
0.81s
Output speed
86 tok/s

Fastest host: vertexAnthropic (via vercel-ai-gateway).

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FAQ

How much does Anthropic: Claude Fable 5.1 cost?

Anthropic: Claude Fable 5.1 is priced at $10.00 per 1M input tokens and $50.00 per 1M output tokens. Output tokens cost more than input.

What is Anthropic: Claude Fable 5.1's context window?

Anthropic: Claude Fable 5.1 supports a context window of 1M tokens — the maximum prompt plus response length it can handle in a single request.

Is Anthropic: Claude Fable 5.1 open weight?

Open-weight status for Anthropic: Claude Fable 5.1 is not recorded in our dataset.

Data as of 2026-10-14. Source: Pricing via OpenRouter API, openrouter.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.