# Claude Fable 5.1

Model tracker · checked 2026-10-14 · https://dbggr.dev/models/claude-fable-5-1/

Claude Fable 5.1 is a frontier model from Anthropic, released 1 September 2026. At Anthropic it costs $10.00 per million input tokens and $50.00 per million output tokens, with a 1M-token context window. 2 providers serve it; the cheapest is AWS at $10.00 input and $50.00 output.

- Made by: Anthropic
- Released: 2026-09-01
- Status: Generally available
- Tier: Frontier
- Weights: Closed
- Context window: 1,000,000 tokens
- Max output: 128,000 tokens
- Input: text, image, pdf
- API id: claude-fable-5-1
- Docs: https://platform.claude.com/docs/en/models/overview

## Claude Fable 5.1 price at 2 providers

US dollars per million tokens. Blended is 3 input tokens for every output token, one number to compare on. The cheapest blended price is highlighted.

| Provider | Input | Output | Cached input | Blended | Batch | Checked |
|---|---|---|---|---|---|---|
| AWS | $10.00 | $50.00 | $0.25 | $20.00 | – | [2026-10-14](https://aws.amazon.com/bedrock/pricing/) |
| Anthropic | $10.00 | $50.00 | $0.25 | $20.00 | 50% off | [2026-10-14](https://platform.claude.com/docs/en/about-claude/pricing) |

- AWS: Global cross-region inference. Geo and In-region cross-region inference cost 10% more: $11 / $55 / $0.275 cached. Cache writes $12.50 (5 min) or $20 (1 h). No batch price. The us. profile id shown is a Geo profile, billed at the Geo rate; use the global inference profile for the Global price.
- Anthropic: Cache writes 1.25x (5 min) or 2x (1 h) input. US-only inference (inference_geo: us) costs 1.1x. Full 1M context at standard price.

## Claude Fable 5.1 benchmarks

| Benchmark | Score | What it measures | Reported by |
|---|---|---|---|
| LMArena text score | 1501 | Elo-style score from people voting between answers | [Independent](https://arena.ai/leaderboard/text) |

Scores reported by a model's maker aren't independently checked.

## Price changes

- Until 2026-10-14 at AWS: $11.00 input, $55.00 output per million tokens.

## Models like Claude Fable 5.1

| Model | Input | Output | Context | Weights |
|---|---|---|---|---|
| Claude Fable 5.1 | $10.00 | $50.00 | 1M | Closed |
| [GPT-6 Astra](https://dbggr.dev/models/gpt-6-astra/) | $10.00 | $50.00 | 1.1M | Closed |
| [Claude Opus 5.5](https://dbggr.dev/models/claude-opus-5-5/) | $4.00 | $20.00 | 1M | Closed |
| [Muse Wonder](https://dbggr.dev/models/muse-wonder/) | $4.00 | $20.00 | 1M | Closed |
| [Gemini 4 Argon](https://dbggr.dev/models/gemini-4-argon/) | $2.00 | $10.00 | 1M | Closed |
| [Mistral Large 4](https://dbggr.dev/models/mistral-large-4/) | $0.68 | $2.09 | 1M | Open |

## FAQ

### How much does Claude Fable 5.1 cost?

Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens at Anthropic, and $0.25 per million cached input tokens, with 50% off for batch requests. Prices are list prices in US dollars, last checked 14 October 2026.

### What is Claude Fable 5.1's context window?

Claude Fable 5.1 takes up to 1,000,000 tokens in one request and writes up to 128,000 tokens in one response.

### Is Claude Fable 5.1 open weight?

No. Claude Fable 5.1 is only available through its providers' APIs; Anthropic doesn't publish the weights.

### Where can I use Claude Fable 5.1?

Claude Fable 5.1 is available from AWS and Anthropic. At Anthropic, call it as `claude-fable-5-1`.