What is the difference between Claude Fable 5.1 and Gemma 3n 2B?

Claude Fable 5.1 is developed by Anthropic while Gemma 3n 2B is developed by Google AI. Claude Fable 5.1 has a 1.0M token context window vs Gemma 3n 2B's 8K. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5.1 or Gemma 3n 2B?

It depends on your use case. Claude Fable 5.1 and Gemma 3n 2B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

How much does Claude Fable 5.1 cost compared to Gemma 3n 2B?

Claude Fable 5.1 costs $10/M input tokens and Gemma 3n 2B costs $0/M input tokens. Gemma 3n 2B 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 2B on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and Gemma 3n 2B 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 2B

Gemma 3n 2B is cheaper than Claude Fable 5.1 at $0/M vs $10/M input tokens.

Claude Fable 5.1 and Gemma 3n 2B compared across 5 shared prompts
Spec	Claude Fable 5.1	Gemma 3n 2B
Input price	$10/M tokens	Free
Output price	$50/M tokens	Free
Context window	1.0M tokens	8K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Sep 2026	Jul 2025

Our Verdict

Claude Fable 5.1

Gemma 3n 2BRunner-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 2B

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 2B

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 2B?

Which is better, Claude Fable 5.1 or Gemma 3n 2B?

How much does Claude Fable 5.1 cost compared to Gemma 3n 2B?

How can I compare Claude Fable 5.1 and Gemma 3n 2B 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 2B?

Which is better, Claude Fable 5.1 or Gemma 3n 2B?

How much does Claude Fable 5.1 cost compared to Gemma 3n 2B?

How can I compare Claude Fable 5.1 and Gemma 3n 2B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages