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  5. Claude Fable 5vsLaguna S 2.1 (free)
Updated Jul 2026

Claude Fable 5vsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than Claude Fable 5 at $0/M vs $10/M input tokens.

Claude Fable 5 and Laguna S 2.1 (free) compared across 2 shared prompts
SpecClaude Fable 5Laguna S 2.1 (free)
Input price$10/M tokensFree
Output price$50/M tokensFree
Context window1.0M tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoYes (1 provider)
ReleasedJun 2026Jul 2026
Our Verdict
Claude Fable 5
Claude Fable 5
Laguna S 2.1 (free)
Laguna S 2.1 (free)Runner-up

Not enough votes to call it. On the specs, Claude Fable 5 has the edge: bigger model tier, bigger context window, major provider backing.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Fable 5
Input
$10.00
Output
$50.00
Laguna S 2.1 (free)
Input
$0.000
Output
$0.000
Where to run it

5 hosts

Claude Fable 54 hosts
HostInOutContextUptime
Amazon Bedrock$10.00 in·$50.00 out·1M—Azure AI Foundry$10.00 in·$50.00 out·1M·89.1% upAnthropic$10.00 in·$50.00 out·1M·99.7% upGoogle Vertex AI$10.00 in·$50.00 out·1M·100% up
Laguna S 2.1 (free)1 host
HostInOutContextUptime
PPoolsidefp4$0 in·$0 out·262k·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Claude Fable 5 is developed by Anthropic while Laguna S 2.1 (free) is developed by Poolside. Claude Fable 5 has a 1.0M token context window vs Laguna S 2.1 (free)'s 262K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Fable 5 and Laguna S 2.1 (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

Claude Fable 5 costs $10/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) 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.

This page shows a side-by-side comparison of Claude Fable 5 and Laguna S 2.1 (free) 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.

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Model pages

Claude Fable 5 logo
Claude Fable 558 outputs, specs and price
Laguna S 2.1 (free) logo
Laguna S 2.1 (free)2 outputs, specs and price
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