What is the difference between Claude Fable 5.1 and Qwen3.5 397B A17B?

Claude Fable 5.1 is developed by Anthropic while Qwen3.5 397B A17B is developed by Qwen. Claude Fable 5.1 has a 1.0M token context window vs Qwen3.5 397B A17B's 262K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5.1 or Qwen3.5 397B A17B?

It depends on your use case. Claude Fable 5.1 and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does Claude Fable 5.1 cost compared to Qwen3.5 397B A17B?

Claude Fable 5.1 costs $10/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Qwen3.5 397B A17B is $9.40/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Fable 5.1 and Qwen3.5 397B A17B on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and Qwen3.5 397B A17B across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Sep 2026

Claude Fable 5.1vsQwen3.5 397B A17B

Qwen3.5 397B A17B is cheaper than Claude Fable 5.1 at $0.6/M vs $10/M input tokens.

Claude Fable 5.1 and Qwen3.5 397B A17B compared across 10 shared prompts
Spec	Claude Fable 5.1	Qwen3.5 397B A17B
Input price	$10/M tokens	$0.6/M tokens
Output price	$50/M tokens	$3.6/M tokens
Context window	1.0M tokens	262K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Sep 2026	Feb 2026

Our Verdict

Claude Fable 5.1

Qwen3.5 397B A17BRunner-up

Not enough votes to call it. On the specs, Claude Fable 5.1 has the edge: newer, bigger context window, major provider backing.

Qwen3.5 397B A17B costs 14x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Fable 5.1

Input

$10.00

Output

$50.00

Qwen3.5 397B A17B

Input

$0.60

17× cheaper

Output

$3.60

14× cheaper

Qwen3.5 397B A17B is cheaper on both: 17× input, 14× output.

Where to run it

14 hosts, cheapest first

Claude Fable 5.14 hosts

HostInOutContextUptime

Amazon Bedrock$10.00 in$50.00 out1M—Anthropic$10.00 in$50.00 out1M99.7% up Azure AI Foundry$10.00 in$50.00 out1M99.7% up Google Vertex AI$10.00 in$50.00 out1M99.7% up

Qwen3.5 397B A17B10 hosts

HostInOutContextUptime

Alibaba Cloud$0.39 in$2.34 out262k99.9% up DeepInfrafp8$0.45 in$3.00 out262k98.8% up Parasailfp8$0.50 in$3.60 out262k98.6% up AtlasCloudfp8$0.55 in$3.50 out262k98.2% up DigitalOcean$0.55 in$3.50 out131k96.3% up Phala$0.55 in$3.50 out262k99.7% up

4 more hosts

GMI Cloudfp8$0.60 in$3.60 out262k80.5% up Novita$0.60 in$3.60 out262k97.6% up StreamLake$0.60 in$3.60 out256k96.8% up Venice$0.75 in$4.50 out128k86.3% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

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More comparisons

Cost per 1M tokens

14 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and Qwen3.5 397B A17B?

Which is better, Claude Fable 5.1 or Qwen3.5 397B A17B?

How much does Claude Fable 5.1 cost compared to Qwen3.5 397B A17B?

How can I compare Claude Fable 5.1 and Qwen3.5 397B A17B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

14 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and Qwen3.5 397B A17B?

Which is better, Claude Fable 5.1 or Qwen3.5 397B A17B?

How much does Claude Fable 5.1 cost compared to Qwen3.5 397B A17B?

How can I compare Claude Fable 5.1 and Qwen3.5 397B A17B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages