Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. Claude Fable 5.1vsLaguna XS 2.1 (free)
Updated Sep 2026

Claude Fable 5.1vsLaguna XS 2.1 (free)

Laguna XS 2.1 (free) is cheaper than Claude Fable 5.1 at $0/M vs $10/M input tokens.

Claude Fable 5.1 and Laguna XS 2.1 (free) compared across 1 shared prompts
SpecClaude Fable 5.1Laguna XS 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)
ReleasedSep 2026Jul 2026
Our Verdict
Claude Fable 5.1
Claude Fable 5.1
Laguna XS 2.1 (free)
Laguna XS 2.1 (free)Runner-up

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

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
Laguna XS 2.1 (free)
Input
$0.000
Output
$0.000
Where to run it

5 hosts

Claude Fable 5.14 hosts
HostInOutContextUptime
Amazon Bedrock$10.00 in·$50.00 out·1M—Anthropic$10.00 in·$50.00 out·1M·99.6% upAzure AI Foundry$10.00 in·$50.00 out·1M·99.7% upGoogle Vertex AI$10.00 in·$50.00 out·1M·99.9% up
Laguna XS 2.1 (free)1 host
HostInOutContextUptime
PPoolsidefp8$0 in·$0 out·262k·99.7% 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 5.1 is developed by Anthropic while Laguna XS 2.1 (free) is developed by Poolside. Claude Fable 5.1 has a 1.0M token context window vs Laguna XS 2.1 (free)'s 262K. You can compare their actual outputs across 1 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Fable 5.1 and Laguna XS 2.1 (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 1 challenges so you can judge which fits your needs best.

Claude Fable 5.1 costs $10/M input tokens and Laguna XS 2.1 (free) costs $0/M input tokens. Laguna XS 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 5.1 and Laguna XS 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.

Keep exploring

More comparisons

Against the newest arrivals

Laguna XS 2.1 (free) logoDeepSeek V4 Flash Vision Exp logo
Laguna XS 2.1 (free) vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Laguna XS 2.1 (free) logoSolar Pro 4 logo
Laguna XS 2.1 (free) vs Solar Pro 4Landed Sep 2026
Laguna XS 2.1 (free) logoHy3 logo
Laguna XS 2.1 (free) vs Hy3Landed Sep 2026
Laguna XS 2.1 (free) logoQwen3.7 Flash logo
Laguna XS 2.1 (free) vs Qwen3.7 FlashLanded Sep 2026
Claude Fable 5.1 logoLing 3.0 Flash logo
Claude Fable 5.1 vs Ling 3.0 FlashLanded Sep 2026
Claude Fable 5.1 logoLaguna S 2.1 (free) logo
Claude Fable 5.1 vs Laguna S 2.1 (free)Landed Sep 2026
Claude Fable 5.1 logoMercury 2.5 logo
Claude Fable 5.1 vs Mercury 2.5Landed Sep 2026
Claude Fable 5.1 logoNemotron 3 Nano Omni (free) logo
Claude Fable 5.1 vs Nemotron 3 Nano Omni (free)Landed Sep 2026

Same lab, same size, long tail

Claude Fable 5.1 logoClaude Opus 4.6 logo
Claude Fable 5.1 vs Claude Opus 4.6Same lab
Claude Fable 5.1 logoClaude Opus 5 logo
Claude Fable 5.1 vs Claude Opus 5Same lab
Laguna XS 2.1 (free) logoLaguna S 2.1 (free) logo
Laguna XS 2.1 (free) vs Laguna S 2.1 (free)Same lab
Laguna XS 2.1 (free) logoOx Alpha logo
Laguna XS 2.1 (free) vs Ox AlphaSame size
Laguna XS 2.1 (free) logoClaude 3 Haiku logo
Laguna XS 2.1 (free) vs Claude 3 HaikuCross-provider
Claude Fable 5.1 logoClaude 3 Opus logo
Claude Fable 5.1 vs Claude 3 OpusSame lab
Claude Fable 5.1 logoClaude 3 Sonnet logo
Claude Fable 5.1 vs Claude 3 SonnetSame lab
Laguna XS 2.1 (free) logoClaude Sonnet 3.6 (2022-10-22) logo
Laguna XS 2.1 (free) vs Claude Sonnet 3.6 (2022-10-22)Same size

Model pages

Claude Fable 5.1 logo
Claude Fable 5.110 outputs, specs and price
Laguna XS 2.1 (free) logo
Laguna XS 2.1 (free)11 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed