anthropic / text-generation API-only released 2026-09-01

Claude Fable 5.1

Name: Claude Fable 5.1
Price: 10 USD
Author: anthropic

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...

Input / 1M

$10.00

Output / 1M

$50.00

Context

AA Intelligence

53.4

Closed weights — available only as a hosted API text + image + file → text View on OpenRouter ↗

Pricing

via OpenRouter · USD per 1M tokens · synced 2026-10-24

$10.00

input / 1M

$50.00

output / 1M

$0.25

cached input / 1M

$60.00

1M in + 1M out

:batch variant $5.00 in · $25.00 out

Context window: 1,000,000 tokens
Max output: 128,000 tokens
Providers: 4
Cheapest provider: Amazon Bedrock · $10.00 / $50.00
Best throughput: —
AA Intelligence / Coding / Agentic: 53.4 / 81.6 / 57.9

✓ Tool calling ✓ Reasoning ✓ Structured outputs ✓ Image input ✓ File input ✗ Audio input ✓ Prompt caching

Price history

tracking started — chart appears after 7 days of snapshots (6 recorded)

Current: $10.00 input · $50.00 output per 1M tokens

Benchmarks

Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.

AA Intelligence Index: 53.4
AA Coding Index: 81.6
AA Agentic Index: 57.9

Design Arena

CategoryEloWin %Rank

fullstack 1326 57.2% #1

godotgamedev 1327 60.7% #1

htmlslides 1394 56.5% #1

mobileapps 1267 56.3% #5

python-pptxslides 1318 60.8% #1

spreadsheet 1404 70.4% #1

webapps 1318 56.1% #1

3d 1393 67.7% #6

asciiart 1323 65% #3

codecategories 1336 59.3% #7

dataviz 1344 61.8% #5

gamedev 1383 65.6% #5

svg 1301 56.4% #6

uicomponent 1336 59.6% #8

website 1313 56.3% #9

Providers

4 providers · per 1M tokens · last 30 min metrics

Provider	Quant	Context	Input	Output	Uptime	Tok/s
Amazon Bedrock	unknown	1M	$10.00	$50.00	—	—
Anthropic	unknown	1M	$10.00	$50.00	100%	—
Azure	unknown	1M	$10.00	$50.00	100%	—
Google	unknown	1M	$10.00	$50.00	100%	—

Provider data from OpenRouter's endpoint listing, refreshed daily.

Specifications

Organisation: anthropic
Released on OpenRouter: 2026-09-01
Context window: 1,000,000 tokens
Max output: 128,000 tokens
Input: text, image, file
Output: text
Tokenizer: Claude
Moderated by provider: Yes
OpenRouter id: anthropic/claude-fable-5.1

Compare with

Popular comparisons

GPT-6 Astra $20.00 Claude Fable 5 $20.00 Claude Opus 5 $10.00 Gemini 4 Argon $4.00 GPT-6.1 Sol $4.00 Kimi K3.1 Pro $4.00 Claude Sonnet 5.5 $4.00 Claude Opus 5.5 $8.00 GPT-5.6 Sol $8.00 GPT-6 Sol $4.00

Browse

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Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.