What is the difference between Claude Fable 5.1 and Gemma 4 26B A4B?

Claude Fable 5.1 is developed by Anthropic while Gemma 4 26B A4B is developed by Google AI. Claude Fable 5.1 has a 1.0M token context window vs Gemma 4 26B A4B'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 Gemma 4 26B A4B?

It depends on your use case. Claude Fable 5.1 and Gemma 4 26B A4B 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 4 26B A4B?

Claude Fable 5.1 costs $10/M input tokens and Gemma 4 26B A4B costs $0.13/M input tokens. Gemma 4 26B A4B is $9.87/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 4 26B A4B on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and Gemma 4 26B A4B 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 4 26B A4B

Gemma 4 26B A4B is cheaper than Claude Fable 5.1 at $0.13/M vs $10/M input tokens.

Claude Fable 5.1 and Gemma 4 26B A4B compared across 10 shared prompts
Spec	Claude Fable 5.1	Gemma 4 26B A4B
Input price	$10/M tokens	$0.13/M tokens
Output price	$50/M tokens	$0.4/M tokens
Context window	1.0M tokens	262K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	Yes (1 provider)
Released	Sep 2026	Apr 2026

Our Verdict

Claude Fable 5.1

Gemma 4 26B A4BRunner-up

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

Gemma 4 26B A4B costs 125x less per token.

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 4 26B A4B

Input

$0.13

77× cheaper

Output

$0.40

125× cheaper

Gemma 4 26B A4B is cheaper on both: 77× input, 125× output.

Where to run it

15 hosts, cheapest first

Claude Fable 5.14 hosts

HostInOutContextUptime

Amazon Bedrock$10.00 in$50.00 out1M—Anthropic$10.00 in$50.00 out1M99.1% up Azure AI Foundry$10.00 in$50.00 out1M99.1% up Google Vertex AI$10.00 in$50.00 out1M99.8% up

Gemma 4 26B A4B11 hosts

HostInOutContextUptime

Darkbloom$0.04 in$0.22 out131k99.2% up DekaLLMbf16$0.06 in$0.33 out262k99.9% up NextBitbf16$0.09 in$0.30 out262k99.7% up Cloudflare Workers AI$0.10 in$0.30 out256k99.9% up Makora$0.10 in$0.34 out262k96.9% up Novitabf16$0.13 in$0.40 out262k99.4% up

5 more hosts

Parasailbf16$0.13 in$0.40 out262k98.4% up Venicebf16$0.13 in$0.40 out256k98.2% up SiliconFlowfp8$0.14 in$0.40 out262k97.2% up Google Vertex AI$0.15 in$0.60 out262k97.8% up DeepInfrafp8degraded$0.07 in$0.34 out262k99.5% 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

15 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and Gemma 4 26B A4B?

Which is better, Claude Fable 5.1 or Gemma 4 26B A4B?

How much does Claude Fable 5.1 cost compared to Gemma 4 26B A4B?

How can I compare Claude Fable 5.1 and Gemma 4 26B A4B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

15 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Claude Fable 5.1 and Gemma 4 26B A4B?

Which is better, Claude Fable 5.1 or Gemma 4 26B A4B?

How much does Claude Fable 5.1 cost compared to Gemma 4 26B A4B?

How can I compare Claude Fable 5.1 and Gemma 4 26B A4B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages