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  5. Laguna S 2.1 (free)vsOpenAI o3
Updated Jul 2026

Laguna S 2.1 (free)vsOpenAI o3

Laguna S 2.1 (free) is cheaper than OpenAI o3 at $0/M vs $10/M input tokens.

Laguna S 2.1 (free) and OpenAI o3 compared across 10 shared prompts
SpecLaguna S 2.1 (free)OpenAI o3
Input priceFree$10/M tokens
Output priceFree$40/M tokens
Context window262K tokens—
Weights—Closed
Free API (OpenRouter)Yes (1 provider)No
ReleasedJul 2026Apr 2025
Our Verdict
OpenAI o3
OpenAI o3
Laguna S 2.1 (free)
Laguna S 2.1 (free)Runner-up

Not enough votes to call it. On the specs, OpenAI o3 has the edge: bigger model tier, major provider backing.

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
OpenAI o3
Input
$10.00
Output
$40.00
Where to run it

2 hosts

Laguna S 2.1 (free)1 host
HostInOutContextUptime
PPoolsidefp4$0 in·$0 out·262k·100% up
OpenAI o31 host
HostInOutContextUptime
OpenAI$2.00 in·$8.00 out·200k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Laguna S 2.1 (free) is developed by Poolside while OpenAI o3 is developed by OpenAI. 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 OpenAI o3 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 OpenAI o3 costs $10/M input tokens. Laguna S 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 Laguna S 2.1 (free) and OpenAI o3 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

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Laguna S 2.1 (free)10 outputs, specs and price
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OpenAI o358 outputs, specs and price
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