What is the difference between GLM 5.3 Flash and Grok 3 Mini Beta?

GLM 5.3 Flash is developed by Zhipu AI while Grok 3 Mini Beta is developed by xAI. GLM 5.3 Flash has a 1.3M token context window vs Grok 3 Mini Beta's 131K. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.3 Flash or Grok 3 Mini Beta?

It depends on your use case. GLM 5.3 Flash and Grok 3 Mini Beta 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.

How much does GLM 5.3 Flash cost compared to Grok 3 Mini Beta?

GLM 5.3 Flash costs $0.15/M input tokens and Grok 3 Mini Beta costs $0.4/M input tokens. GLM 5.3 Flash is $0.25/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GLM 5.3 Flash and Grok 3 Mini Beta on Rival?

This page shows a side-by-side comparison of GLM 5.3 Flash and Grok 3 Mini Beta 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.

Updated Aug 2026

GLM 5.3 FlashvsGrok 3 Mini Beta

GLM 5.3 Flash is cheaper than Grok 3 Mini Beta at $0.15/M vs $0.4/M input tokens.

GLM 5.3 Flash and Grok 3 Mini Beta compared across 5 shared prompts
Spec	GLM 5.3 Flash	Grok 3 Mini Beta
Input price	$0.15/M tokens	$0.4/M tokens
Output price	$0.5/M tokens	$0.8/M tokens
Context window	1.3M tokens	131K tokens
Weights	Open	—
Free API (OpenRouter)	No	No
Released	Aug 2026	Apr 2025

Our Verdict

GLM 5.3 Flash

Grok 3 Mini BetaRunner-up

Not enough votes to call it. On the specs, GLM 5.3 Flash has the edge: bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

GLM 5.3 Flash

Input

$0.15

2.7× cheaper

Output

$0.50

1.6× cheaper

Grok 3 Mini Beta

Input

$0.40

Output

$0.80

GLM 5.3 Flash is cheaper on both: 2.7× input, 1.6× output.

Where to run it

30 hosts, cheapest first

GLM 5.3 Flash30 hosts

HostInOutContextUptime

DeepInfrafp4$0.07 in$0.25 out1M99.1% up GMI Cloudfp8$0.07 in$0.25 out1M99.2% up Morph$0.08 in$0.28 out1M100% up InferenceNetfp4$0.09 in$0.28 out1M97.2% up Wafer$0.10 in$0.35 out1M99.8% up OpenInferencefp4$0.10 in$0.50 out1M98.2% up

24 more hosts

Relace$0.11 in$0.36 out1M99.7% up Phalafp8$0.13 in$0.42 out1M99.5% up Novitafp8$0.13 in$0.44 out1M99.4% up StreamLakefp8$0.14 in$0.47 out1M99% up Sail Researchfp8$0.14 in$0.47 out1M99% up AtlasCloudfp8$0.15 in$0.50 out1M99.6% up Basetenfp8$0.15 in$0.50 out1M99.1% up Cloudflare Workers AI$0.15 in$0.50 out1.3M99.8% up CoreWeavenvfp4$0.15 in$0.50 out1M99.5% up DigitalOcean$0.15 in$0.50 out1M94.4% up Fireworks$0.15 in$0.50 out1M99.1% up Friendli$0.15 in$0.50 out1M98.7% up Inceptronfp8$0.15 in$0.50 out1M98.2% up io.netfp8$0.15 in$0.50 out262k99.2% up Near AIfp8$0.15 in$0.50 out1M98.9% up Rekafp8$0.15 in$0.50 out262k98.9% up SiliconFlowfp8$0.15 in$0.50 out1M99.7% up Together$0.15 in$0.50 out1M99.5% up Venice$0.15 in$0.50 out1M98.7% up Z.aifp8$0.15 in$0.50 out1M96.6% up NextBitfp8$0.18 in$0.60 out1M98% up Modalfp8$0.45 in$1.50 out1M99.6% up Crusoefp4degraded$0.15 in$0.50 out1M93% up Parasailfp8degraded$0.15 in$0.50 out1M98.7% up

Grok 3 Mini Beta

No hosts listed on OpenRouter.

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

Research

What we learned reading every model

FAQ

Common questions

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More comparisons

Cost per 1M tokens

30 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GLM 5.3 Flash and Grok 3 Mini Beta?

Which is better, GLM 5.3 Flash or Grok 3 Mini Beta?

How much does GLM 5.3 Flash cost compared to Grok 3 Mini Beta?

How can I compare GLM 5.3 Flash and Grok 3 Mini Beta on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

30 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GLM 5.3 Flash and Grok 3 Mini Beta?

Which is better, GLM 5.3 Flash or Grok 3 Mini Beta?

How much does GLM 5.3 Flash cost compared to Grok 3 Mini Beta?

How can I compare GLM 5.3 Flash and Grok 3 Mini Beta on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages