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  5. GLM 5.3 FlashXvsLaguna S 2.1 (free)
Updated Sep 2026

GLM 5.3 FlashXvsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than GLM 5.3 FlashX at $0/M vs $0.37/M input tokens.

GLM 5.3 FlashX and Laguna S 2.1 (free) compared across 5 shared prompts
SpecGLM 5.3 FlashXLaguna S 2.1 (free)
Input price$0.37/M tokensFree
Output price$1.25/M tokensFree
Context window1.0M tokens262K tokens
Free API (OpenRouter)NoYes (1 provider)
ReleasedSep 2026Jul 2026
Our Verdict
GLM 5.3 FlashX
GLM 5.3 FlashX
Laguna S 2.1 (free)
Laguna S 2.1 (free)Runner-up

Not enough votes to call it. On the specs, GLM 5.3 FlashX has the edge: newer, bigger context window, major provider backing.

Too close to call
API pricing

Cost per 1M tokens

GLM 5.3 FlashX
Input
$0.37
Output
$1.25
Laguna S 2.1 (free)
Input
$0.000
Output
$0.000
Where to run it

2 hosts

GLM 5.3 FlashX1 host
HostInOutContextUptime
Z.aifp8$0.37 in·$1.25 out·1M·100% up
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

GLM 5.3 FlashX is developed by Zhipu AI while Laguna S 2.1 (free) is developed by Poolside. GLM 5.3 FlashX has a 1.0M token context window vs Laguna S 2.1 (free)'s 262K. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

It depends on your use case. GLM 5.3 FlashX and Laguna S 2.1 (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

GLM 5.3 FlashX costs $0.37/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) is $0.37/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 GLM 5.3 FlashX 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

GLM 5.3 FlashX logo
GLM 5.3 FlashX12 outputs, specs and price
Laguna S 2.1 (free) logo
Laguna S 2.1 (free)10 outputs, specs and price
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