What is the difference between Claude 3.7 Sonnet and Laguna S 2.1 (free)?

Claude 3.7 Sonnet is developed by Anthropic while Laguna S 2.1 (free) is developed by Poolside. Claude 3.7 Sonnet has a 200K token context window vs Laguna S 2.1 (free)'s 262K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Sonnet or Laguna S 2.1 (free)?

It depends on your use case. Claude 3.7 Sonnet and Laguna S 2.1 (free) 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 3.7 Sonnet cost compared to Laguna S 2.1 (free)?

Claude 3.7 Sonnet costs $3/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) is $3.00/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 3.7 Sonnet and Laguna S 2.1 (free) on Rival?

This page shows a side-by-side comparison of Claude 3.7 Sonnet 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.

Updated Jul 2026

Claude 3.7 SonnetvsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than Claude 3.7 Sonnet at $0/M vs $3/M input tokens.

Claude 3.7 Sonnet and Laguna S 2.1 (free) compared across 10 shared prompts
Spec	Claude 3.7 Sonnet	Laguna S 2.1 (free)
Input price	$3/M tokens	Free
Output price	$15/M tokens	Free
Context window	200K tokens	262K tokens
Free API (OpenRouter)	No	Yes (1 provider)
Released	Feb 2025	Jul 2026

Side by side

Same prompt, both answers

Opening lines from 3 of the 10 prompts both answered. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Claude 3.7 Sonnet1,348 words

Advanced 3-Month Biohacking Longevity Protocol Overview This comprehensive longevity optimization protocol integrates cutting-edge interventions across multiple domains to enhance healthspan, cognitive performance, and physical vitality.

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Laguna S 2.1 (free)1,140 words

Comprehensive 3-Month Longevity Optimization Plan Phase 1: Foundation & Assessment (Month 1) Week 1-2: Baseline Establishment Comprehensive Health Testing Complete blood panel (CBC, CMP, lipid panel, inflammatory markers: hs-CRP, IL-6) Hormone panel (testosterone, estrogen, DHEA, cortisol, thyroid panel) Genetic…

Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

Claude 3.7 Sonnet554 words

Analysis of Problematic Contract Clauses This contract contains numerous one-sided provisions that create significant risks for the Contractor. Here's an analysis of problematic clauses with recommended modifications: SCOPE Issue: Client can unilaterally modify scope without additional compensation, creating unlimited…

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Laguna S 2.1 (free)275 words

I'll analyze each clause for potential exploitation against the contractor and suggest improvements. Exploitable Clauses & Recommended Modifications SCOPE CLAUSE Problem: "Client reserves the right to modify the scope at any time without additional compensation" Allows unlimited scope creep without extra pay No…

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Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

Claude 3.7 Sonnet999 words

INVESTMENT COMMITTEE MEMO: LEDGERLIFT (LLLT) RECOMMENDATION: LONG PT RANGE: $52-$80 UPSIDE: 13-74% Thesis: LedgerLift presents a compelling risk-reward profile in the B2B spend management space, with strong NRR (123%) and operating leverage driving an underappreciated margin expansion story.

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Laguna S 2.1 (free)910 words

INTERNAL INVESTMENT COMMITTEE MEMO 1. Recommendation & Thesis Recommendation: LONG 12-Month Price Target Range: $62 – $75/share Thesis: LedgerLift is a high-quality B2B SaaS platform with strong recurring revenue, exceptional unit economics, and durable customer retention.

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Our Verdict

Claude 3.7 Sonnet

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 3.7 Sonnet

Input

$3.00

Output

$15.00

Laguna S 2.1 (free)

Input

$0.000

Output

$0.000

Where to run it

1 host

Claude 3.7 Sonnet

No hosts listed on OpenRouter.

Laguna S 2.1 (free)1 host

HostInOutContextUptime

Poolsidefp4$0 in$0 out262k100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Same prompt, both answers

Advanced Longevity Plan (Biohacker)

Adversarial Contract Review

Advanced Investment Memo (IC Memo)

Cost per 1M tokens

1 host

What we learned reading every model

Common questions

What is the difference between Claude 3.7 Sonnet and Laguna S 2.1 (free)?

Which is better, Claude 3.7 Sonnet or Laguna S 2.1 (free)?

How much does Claude 3.7 Sonnet cost compared to Laguna S 2.1 (free)?

How can I compare Claude 3.7 Sonnet and Laguna S 2.1 (free) on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Same prompt, both answers

Advanced Longevity Plan (Biohacker)

Adversarial Contract Review

Advanced Investment Memo (IC Memo)

Cost per 1M tokens

1 host

What we learned reading every model

Common questions

What is the difference between Claude 3.7 Sonnet and Laguna S 2.1 (free)?

Which is better, Claude 3.7 Sonnet or Laguna S 2.1 (free)?

How much does Claude 3.7 Sonnet cost compared to Laguna S 2.1 (free)?

How can I compare Claude 3.7 Sonnet and Laguna S 2.1 (free) on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages