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  5. Laguna S 2.1 (free)vsQwen3.5 Plus 2026-02-15
Updated Jul 2026

Laguna S 2.1 (free)vsQwen3.5 Plus 2026-02-15

Laguna S 2.1 (free) is cheaper than Qwen3.5 Plus 2026-02-15 at $0/M vs $0.4/M input tokens.

Laguna S 2.1 (free) and Qwen3.5 Plus 2026-02-15 compared across 10 shared prompts
SpecLaguna S 2.1 (free)Qwen3.5 Plus 2026-02-15
Input priceFree$0.4/M tokens
Output priceFree$2.4/M tokens
Context window262K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)Yes (1 provider)No
ReleasedJul 2026Feb 2026
Side by side

Same prompt, both answers

Opening lines from 4 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…

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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Qwen3.5 Plus 2026-02-151,032 words
The "Quantum Leap" 90-Day Longevity & Performance Protocol Disclaimer: This protocol represents an advanced biohacking framework. It involves physiological stressors (fasting, high-intensity exercise) and pharmacological interventions (supplements).
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…

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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Qwen3.5 Plus 2026-02-151,697 words
This contract contains several highly unfavorable and potentially unenforceable clauses that heavily skew risk and power toward the Client while exposing the Contractor to significant financial and operational liability.
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…

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
Qwen3.5 Plus 2026-02-151,089 words
MEMORANDUM TO: Investment Committee FROM: TMT Research Team DATE: October 26, 2023 SUBJECT: LedgerLift (LLLT) – Long Idea: Undervalued Quality in Mid-Market AP Automation Recommendation Rating: LONG 12-Month Price Target: $68 – $74 Thesis: LedgerLift is a best-in-class mid-market spend management platform trading at a…
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Favorite Game

I know you're an AI and don't truly have personal preferences, but if you had to pick one video game as your all-time favorite, which would…

Laguna S 2.1 (free)8 words
The Legend of Zelda Breath of the Wild
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Qwen3.5 Plus 2026-02-158 words
The Legend of Zelda Breath of the Wild
Read the full answer
Our Verdict
Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15
Laguna S 2.1 (free)
Laguna S 2.1 (free)Runner-up

Not enough votes to call it. On the specs, Qwen3.5 Plus 2026-02-15 has the edge: bigger model tier, bigger context window.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Laguna S 2.1 (free)
Input
$0.000
Output
$0.000
Qwen3.5 Plus 2026-02-15
Input
$0.40
Output
$2.40
Where to run it

2 hosts

Laguna S 2.1 (free)1 host
HostInOutContextUptime
PPoolsidefp4$0 in·$0 out·262k·100% up
Qwen3.5 Plus 2026-02-151 host
HostInOutContextUptime
Alibaba Cloud$0.26 in·$1.56 out·1M·100% up

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

Research

What we learned reading every model

FAQ

Common questions

Laguna S 2.1 (free) is developed by Poolside while Qwen3.5 Plus 2026-02-15 is developed by Qwen. Laguna S 2.1 (free) has a 262K token context window vs Qwen3.5 Plus 2026-02-15's 1.0M. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

It depends on your use case. Laguna S 2.1 (free) and Qwen3.5 Plus 2026-02-15 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.

Laguna S 2.1 (free) costs $0/M input tokens and Qwen3.5 Plus 2026-02-15 costs $0.4/M input tokens. Laguna S 2.1 (free) is $0.40/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 Laguna S 2.1 (free) and Qwen3.5 Plus 2026-02-15 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

Laguna S 2.1 (free) logo
Laguna S 2.1 (free)10 outputs, specs and price
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Qwen3.5 Plus 2026-02-1553 outputs, specs and price
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