---
title: Anthropic: Claude Fable 5.1 — Context Window and Pricing
canonical: https://prompeteer.ai/models/anthropic-claude-fable-5-1
updated: 2026-09-22T00:00:00-07:00
source: OpenRouter /models
---

# Anthropic: Claude Fable 5.1

Anthropic: Claude Fable 5.1 offers a 1,000,000-token context window at $10.00 per 1M input tokens and $50.00 per 1M output tokens.

| Attribute | Value |
| --- | --- |
| Context window | 1,000,000 tokens |
| Input price | $10.00 / 1M |
| Output price | $50.00 / 1M |
| Input modalities | text, image, file |
| Model id | anthropic/claude-fable-5.1 |

## FAQ

**What is the context window of Anthropic: Claude Fable 5.1?**

Anthropic: Claude Fable 5.1 supports up to 1,000,000 tokens of context.

**How much does Anthropic: Claude Fable 5.1 cost?**

$10.00 per 1M input tokens and $50.00 per 1M output tokens (via OpenRouter /models, as of Sep 22, 2026).

**What input types does Anthropic: Claude Fable 5.1 support?**

Anthropic: Claude Fable 5.1 accepts text, image, file.

Source: Data via OpenRouter /models — as of Sep 22, 2026.

## Sources and scope

[OpenRouter model catalogue feed](https://openrouter.ai/api/v1/models)

- [Anthropic: Claude Fable 5.1 source listing](https://openrouter.ai/anthropic/claude-fable-5.1)

These are provider-catalog specifications, not a task-quality benchmark. Prices describe the source listing and may vary by provider or routing. Unknown values are shown as — when the feed did not supply that value.

## Try your task

[Open the prompt composer](/create)

Open the composer and choose a supported target model. The reference catalogue may include models unavailable in the composer.