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  5. Gemini 1.5 ProvsGLM 5.3 FlashX
Updated Sep 2026

Gemini 1.5 ProvsGLM 5.3 FlashX

GLM 5.3 FlashX is cheaper than Gemini 1.5 Pro at $0.37/M vs $3.5/M input tokens.

Gemini 1.5 Pro and GLM 5.3 FlashX compared across 1 shared prompts
SpecGemini 1.5 ProGLM 5.3 FlashX
Input price$3.5/M tokens$0.37/M tokens
Output price$10.5/M tokens$1.25/M tokens
Context window1.0M tokens1.0M tokens
Free API (OpenRouter)NoNo
ReleasedFeb 2024Sep 2026
Our Verdict
Gemini 1.5 Pro
Gemini 1.5 Pro
GLM 5.3 FlashX
GLM 5.3 FlashX

Not enough votes to call it. On the specs, nothing separates them.

GLM 5.3 FlashX costs 8.4x less per token.

Too close to call
API pricing

Cost per 1M tokens

Gemini 1.5 Pro
Input
$3.50
Output
$10.50
GLM 5.3 FlashX
Input
$0.37
9.5× cheaper
Output
$1.25
8.4× cheaper

GLM 5.3 FlashX is cheaper on both: 9.5× input, 8.4× output.

Where to run it

1 host

Gemini 1.5 Pro

No hosts listed on OpenRouter.

GLM 5.3 FlashX1 host
HostInOutContextUptime
Z.aifp8$0.37 in·$1.25 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

Gemini 1.5 Pro is developed by Google AI while GLM 5.3 FlashX is developed by Zhipu AI. Gemini 1.5 Pro has a 1.0M token context window vs GLM 5.3 FlashX's 1.0M. You can compare their actual outputs across 1 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 1.5 Pro and GLM 5.3 FlashX each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 1 challenges so you can judge which fits your needs best.

Gemini 1.5 Pro costs $3.5/M input tokens and GLM 5.3 FlashX costs $0.37/M input tokens. GLM 5.3 FlashX is $3.13/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 Gemini 1.5 Pro and GLM 5.3 FlashX 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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