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  5. Claude Haiku 4.5vsLaguna S 2.1 (free)
Updated Jul 2026

Claude Haiku 4.5vsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than Claude Haiku 4.5 at $0/M vs $1/M input tokens.

Claude Haiku 4.5 and Laguna S 2.1 (free) compared across 2 shared prompts
SpecClaude Haiku 4.5Laguna S 2.1 (free)
Input price$1/M tokensFree
Output price$5/M tokensFree
Context window200K tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoYes (1 provider)
ReleasedOct 2025Jul 2026
Our Verdict
Claude Haiku 4.5
Claude Haiku 4.5
Laguna S 2.1 (free)
Laguna S 2.1 (free)

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Haiku 4.5
Input
$1.00
Output
$5.00
Laguna S 2.1 (free)
Input
$0.000
Output
$0.000
Where to run it

5 hosts

Claude Haiku 4.54 hosts
HostInOutContextUptime
Amazon Bedrock$1.00 in·$5.00 out·200k·100% upAnthropic$1.00 in·$5.00 out·200k·100% upAzure AI Foundry$1.00 in·$5.00 out·200k·100% upGoogle Vertex AI$1.00 in·$5.00 out·200k·99.9% 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 Haiku 4.5 is developed by Anthropic while Laguna S 2.1 (free) is developed by Poolside. Claude Haiku 4.5 has a 200K 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 Haiku 4.5 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 Haiku 4.5 costs $1/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) is $1.00/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 Haiku 4.5 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 Haiku 4.5 logo
Claude Haiku 4.554 outputs, specs and price
Laguna S 2.1 (free) logo
Laguna S 2.1 (free)2 outputs, specs and price
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