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  5. DeepSeek V4.1 FlashvsGLM 5.3 Prime
Updated Sep 2026

DeepSeek V4.1 FlashvsGLM 5.3 Prime

DeepSeek V4.1 Flash is cheaper than GLM 5.3 Prime at $0.15/M vs $2.8/M input tokens.

DeepSeek V4.1 Flash and GLM 5.3 Prime compared across 6 shared prompts
SpecDeepSeek V4.1 FlashGLM 5.3 Prime
Input price$0.15/M tokens$2.8/M tokens
Output price$0.6/M tokens$8.8/M tokens
Context window1.0M tokens1.0M tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedSep 2026Sep 2026
Our Verdict
DeepSeek V4.1 Flash
DeepSeek V4.1 Flash
GLM 5.3 Prime
GLM 5.3 Prime

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

DeepSeek V4.1 Flash costs 15x less per token.

Too close to call
API pricing

Cost per 1M tokens

DeepSeek V4.1 Flash
Input
$0.15
19× cheaper
Output
$0.60
15× cheaper
GLM 5.3 Prime
Input
$2.80
Output
$8.80

DeepSeek V4.1 Flash is cheaper on both: 19× input, 15× output.

Where to run it

27 hosts, cheapest first

DeepSeek V4.1 Flash26 hosts
HostInOutContextUptime
DDekaLLM$0.04 in·$0.49 out·1M·99.4% upMMorph$0.07 in·$0.30 out·1M·100% upOOpenInferencefp4$0.10 in·$0.50 out·1M·99.4% upRRelace$0.10 in·$0.50 out·1M·99.9% upSSail Researchfp4$0.13 in·$0.75 out·1M·99.1% upDDeepInfrafp8$0.14 in·$0.42 out·1M·99.9% up
20 more hostsFewer hosts
SStreamLakefp8$0.17 in·$0.66 out·1M·99.7% upWWafer$0.20 in·$0.60 out·1M·100% upCCoreWeavefp8$0.20 in·$0.65 out·1M·99.4% upFFireworks$0.22 in·$0.66 out·1M·99.9% upGGMI Cloudfp8$0.23 in·$0.90 out·1M·99.8% upKKreafp8$0.23 in·$0.90 out·1M·95.6% upPPhala$0.28 in·$1.10 out·1M·99.3% upNNovitafp8$0.28 in·$1.14 out·1M·100% upAlibaba Cloud$0.30 in·$1.20 out·1M·99.7% upAAtlasCloudfp8$0.30 in·$1.20 out·1M·99.9% upBBasetenfp8$0.30 in·$1.20 out·1M·99.4% upDeepSeek$0.30 in·$1.20 out·1M·100% upDDigitalOcean$0.30 in·$1.20 out·1M·99.9% upMMakorafp8$0.30 in·$1.20 out·1M·99.2% upModal$0.30 in·$1.20 out·1M·99.6% upNNextBitfp8$0.30 in·$1.20 out·1M·100% upPParasailfp8$0.30 in·$1.20 out·1M·97.1% upSSiliconFlowfp8$0.30 in·$1.20 out·1M·99.5% upTTogether$0.30 in·$1.20 out·1M·99.3% upVVenicefp8$0.38 in·$1.50 out·1M·98.7% up
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

DeepSeek V4.1 Flash is developed by DeepSeek while GLM 5.3 Prime is developed by Z.ai. DeepSeek V4.1 Flash has a 1.0M token context window vs GLM 5.3 Prime's 1.0M. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.

It depends on your use case. DeepSeek V4.1 Flash and GLM 5.3 Prime each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 6 challenges so you can judge which fits your needs best.

DeepSeek V4.1 Flash costs $0.15/M input tokens and GLM 5.3 Prime costs $2.8/M input tokens. DeepSeek V4.1 Flash is $2.65/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 DeepSeek V4.1 Flash 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.

Keep exploring

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Same lab, same size, long tail

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Model pages

DeepSeek V4.1 Flash logo
DeepSeek V4.1 Flash6 outputs, specs and price
GLM 5.3 Prime logo
GLM 5.3 Prime16 outputs, specs and price
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