What is the difference between Claude Fable 5.1 and Gemma 3n 4B?

Claude Fable 5.1 is developed by Anthropic while Gemma 3n 4B is developed by Google AI. Claude Fable 5.1 has a 1.0M token context window vs Gemma 3n 4B's 33K. 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 Gemma 3n 4B?

It depends on your use case. Claude Fable 5.1 and Gemma 3n 4B 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 Gemma 3n 4B?

Claude Fable 5.1 costs $10/M input tokens and Gemma 3n 4B costs $0/M input tokens. Gemma 3n 4B is $10.00/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 Gemma 3n 4B on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and Gemma 3n 4B 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 5.1vsGemma 3n 4B

Gemma 3n 4B is cheaper than Claude Fable 5.1 at $0/M vs $10/M input tokens.

Claude Fable 5.1 and Gemma 3n 4B compared across 10 shared prompts
Spec	Claude Fable 5.1	Gemma 3n 4B
Input price	$10/M tokens	Free
Output price	$50/M tokens	Free
Context window	1.0M tokens	33K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Sep 2026	May 2025

Our Verdict

Claude Fable 5.1

Gemma 3n 4BRunner-up

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

Slight edge

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

Gemma 3n 4B

Input

$0.000

Output

$0.000

Where to run it

4 hosts

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

Gemma 3n 4B

No hosts listed on OpenRouter.

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

4 hosts

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and Gemma 3n 4B?

Which is better, Claude Fable 5.1 or Gemma 3n 4B?

How much does Claude Fable 5.1 cost compared to Gemma 3n 4B?

How can I compare Claude Fable 5.1 and Gemma 3n 4B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

4 hosts

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and Gemma 3n 4B?

Which is better, Claude Fable 5.1 or Gemma 3n 4B?

How much does Claude Fable 5.1 cost compared to Gemma 3n 4B?

How can I compare Claude Fable 5.1 and Gemma 3n 4B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages