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  5. DeepSeek V4.1 FlashvsGrok 4.20 Beta
Updated Sep 2026

DeepSeek V4.1 FlashvsGrok 4.20 Beta

DeepSeek V4.1 Flash is cheaper than Grok 4.20 Beta at $0.15/M vs $2/M input tokens.

DeepSeek V4.1 Flash and Grok 4.20 Beta compared across 6 shared prompts
SpecDeepSeek V4.1 FlashGrok 4.20 Beta
Input price$0.15/M tokens$2/M tokens
Output price$0.6/M tokens$6/M tokens
Context window1.0M tokens2.0M tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedSep 2026Mar 2026
Our Verdict
Grok 4.20 Beta
Grok 4.20 Beta
DeepSeek V4.1 Flash
DeepSeek V4.1 FlashRunner-up

Not enough votes to call it. On the specs, Grok 4.20 Beta has the edge: bigger model tier, bigger context window.

DeepSeek V4.1 Flash costs 10x less per token.

Too close to call
API pricing

Cost per 1M tokens

DeepSeek V4.1 Flash
Input
$0.15
13× cheaper
Output
$0.60
10× cheaper
Grok 4.20 Beta
Input
$2.00
Output
$6.00

DeepSeek V4.1 Flash is cheaper on both: 13× input, 10× output.

Where to run it

24 hosts, cheapest first

DeepSeek V4.1 Flash23 hosts
HostInOutContextUptime
OOpenInferencefp4$0.10 in·$0.50 out·1M·99.5% upWWafer$0.12 in·$0.60 out·1M·99.7% upRRelacefp4$0.12 in·$0.52 out·1M·99.9% upMMorph$0.13 in·$0.51 out·1M·98.4% upSSail Researchfp4$0.13 in·$0.75 out·1M·99.9% upDDeepInfrafp8$0.14 in·$0.42 out·1M·99.7% up
17 more hostsFewer hosts
SStreamLakefp8$0.15 in·$0.60 out·1M·99.5% upCCoreWeavefp8$0.20 in·$0.65 out·1M·99.2% upFFireworks$0.22 in·$0.66 out·1M·98.8% upPPhala$0.28 in·$1.10 out·1M·99.4% upGGMI Cloudfp8$0.28 in·$1.14 out·1M·99.6% upNNovitafp8$0.28 in·$1.14 out·1M·100% upAlibaba Cloud$0.30 in·$1.20 out·1M·99.9% upAAtlasCloudfp8$0.30 in·$1.20 out·1M·99.7% 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·97.9% upMMakora$0.30 in·$1.20 out·1M·98.9% upModal$0.30 in·$1.20 out·1M·99.8% upSSiliconFlowfp8$0.30 in·$1.20 out·1M·99.8% upTTogether$0.30 in·$1.20 out·1M·99.9% upVVenicefp8$0.38 in·$1.50 out·1M·96.7% upPParasailfp8degraded$0.30 in·$1.20 out·1M·93% up
Grok 4.20 Beta1 host
HostInOutContextUptime
xAI$1.25 in·$2.50 out·2M·99.5% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

DeepSeek V4.1 Flash is developed by DeepSeek while Grok 4.20 Beta is developed by xAI. DeepSeek V4.1 Flash has a 1.0M token context window vs Grok 4.20 Beta's 2.0M. 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 Grok 4.20 Beta 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 Grok 4.20 Beta costs $2/M input tokens. DeepSeek V4.1 Flash is $1.85/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 Grok 4.20 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.

Keep exploring

More comparisons

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Same lab, same size, long tail

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Grok 4.20 Beta vs Grok 4.20 Multi-Agent BetaVersion compare
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Grok 4.20 Beta vs Grok 4.7Same lab
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DeepSeek V4.1 Flash vs Gemini 3.1 Pro PreviewNew provider
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DeepSeek V4.1 Flash vs Gemini 3.7 FlashSame size

Model pages

DeepSeek V4.1 Flash logo
DeepSeek V4.1 Flash6 outputs, specs and price
Grok 4.20 Beta logo
Grok 4.20 Beta53 outputs, specs and price
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