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  5. Gemini 1.5 ProvsGLM 5.3 Prime
Updated Sep 2026

Gemini 1.5 ProvsGLM 5.3 Prime

GLM 5.3 Prime is cheaper than Gemini 1.5 Pro at $2.8/M vs $3.5/M input tokens.

Gemini 1.5 Pro and GLM 5.3 Prime compared across 1 shared prompts
SpecGemini 1.5 ProGLM 5.3 Prime
Input price$3.5/M tokens$2.8/M tokens
Output price$10.5/M tokens$8.8/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 Prime
GLM 5.3 Prime

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

Too close to call
API pricing

Cost per 1M tokens

Gemini 1.5 Pro
Input
$3.50
Output
$10.50
GLM 5.3 Prime
Input
$2.80
1.3× cheaper
Output
$8.80
1.2× cheaper

GLM 5.3 Prime is cheaper on both: 1.3× input, 1.2× output.

Where to run it

1 host

Gemini 1.5 Pro

No hosts listed on OpenRouter.

GLM 5.3 Prime1 host
HostInOutContextUptime
Alibaba Cloud$2.80 in·$8.80 out·1M·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 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 Prime is developed by Z.ai. Gemini 1.5 Pro has a 1.0M token context window vs GLM 5.3 Prime'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 Prime 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 Prime costs $2.8/M input tokens. GLM 5.3 Prime is $0.70/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 Prime 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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