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  5. GPT-5.2 ChatvsLaguna S 2.1 (free)
Updated Jul 2026

GPT-5.2 ChatvsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than GPT-5.2 Chat at $0/M vs $1.75/M input tokens.

GPT-5.2 Chat and Laguna S 2.1 (free) compared across 10 shared prompts
SpecGPT-5.2 ChatLaguna S 2.1 (free)
Input price$1.75/M tokensFree
Output price$14/M tokensFree
Context window128K tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoYes (1 provider)
ReleasedDec 2025Jul 2026
Our Verdict
GPT-5.2 Chat
GPT-5.2 Chat
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

GPT-5.2 Chat
Input
$1.75
Output
$14.00
Laguna S 2.1 (free)
Input
$0.000
Output
$0.000
Where to run it

2 hosts

GPT-5.2 Chat1 host
HostInOutContextUptime
Azure AI Foundry$1.75 in·$14.00 out·128k—
Laguna S 2.1 (free)1 host
HostInOutContextUptime
PPoolsidefp4$0 in·$0 out·262k·100% up

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

Research

What we learned reading every model

FAQ

Common questions

GPT-5.2 Chat is developed by OpenAI while Laguna S 2.1 (free) is developed by Poolside. GPT-5.2 Chat has a 128K 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.

It depends on your use case. GPT-5.2 Chat 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.

GPT-5.2 Chat costs $1.75/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) is $1.75/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 GPT-5.2 Chat 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

GPT-5.2 Chat logo
GPT-5.2 Chat53 outputs, specs and price
Laguna S 2.1 (free) logo
Laguna S 2.1 (free)10 outputs, specs and price
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