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

Claude 3.7 Thinking Sonnet is developed by Anthropic while Laguna S 2.1 (free) is developed by Poolside. Claude 3.7 Thinking 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 Thinking Sonnet or Laguna S 2.1 (free)?

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

Claude 3.7 Thinking Sonnet costs $6/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) is $6.00/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 Thinking Sonnet and Laguna S 2.1 (free) on Rival?

This page shows a side-by-side comparison of Claude 3.7 Thinking 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 Thinking SonnetvsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than Claude 3.7 Thinking Sonnet at $0/M vs $6/M input tokens.

Claude 3.7 Thinking Sonnet and Laguna S 2.1 (free) compared across 10 shared prompts
Spec	Claude 3.7 Thinking Sonnet	Laguna S 2.1 (free)
Input price	$6/M tokens	Free
Output price	$30/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.

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 Thinking Sonnet712 words

Analysis of Problematic Contract Clauses This software consulting agreement contains numerous unbalanced provisions that heavily favor the client at the contractor's expense. Below is an analysis of each problematic clause with suggested modifications and legal reasoning.

Read the full answer

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…

Read the full answer

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 Thinking Sonnet760 words

INVESTMENT COMMITTEE MEMO: LEDGERLIFT (LLLT) RECOMMENDATION: LONG PT RANGE: $48-$66 (Base/Bull) Thesis: LedgerLift's market-leading spend management platform demonstrates exceptional unit economics with 123% NRR and 18-month CAC payback, positioning it to capture significant share in the underpenetrated mid-market…

Read the full answer

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.

Read the full answer

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 Thinking Sonnet1,727 words

Comprehensive 3-Month Longevity Optimization Protocol Initial Assessment Phase (Week 0) Establish your baseline with these measurements before beginning: Blood Panel: Complete metabolic panel, lipid profile, inflammatory markers (hsCRP, IL-6), hormones (testosterone, estrogen, DHEA, cortisol), fasting glucose, HbA1c…

Read the full answer

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…

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Our Verdict

Claude 3.7 Thinking 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 Thinking Sonnet

Input

$6.00

Output

$30.00

Laguna S 2.1 (free)

Input

$0.000

Output

$0.000

Where to run it

1 host

Claude 3.7 Thinking 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

Adversarial Contract Review

Advanced Investment Memo (IC Memo)

Advanced Longevity Plan (Biohacker)

Cost per 1M tokens

1 host

What we learned reading every model

Common questions

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

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

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

How can I compare Claude 3.7 Thinking 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

Adversarial Contract Review

Advanced Investment Memo (IC Memo)

Advanced Longevity Plan (Biohacker)

Cost per 1M tokens

1 host

What we learned reading every model

Common questions

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

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

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

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

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages