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  5. DeepSeek V4.1 FlashvsGemini 2.5 Flash Preview
Updated Sep 2026

DeepSeek V4.1 FlashvsGemini 2.5 Flash Preview

DeepSeek V4.1 Flash is the newer model, released after Gemini 2.5 Flash Preview.

DeepSeek V4.1 Flash and Gemini 2.5 Flash Preview compared across 1 shared prompts
SpecDeepSeek V4.1 FlashGemini 2.5 Flash Preview
Input price$0.15/M tokens$0.15/M tokens
Output price$0.6/M tokens$0.6/M tokens
Context window1.0M tokens1.0M tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedSep 2026Apr 2025
Our Verdict
DeepSeek V4.1 Flash
DeepSeek V4.1 Flash
Gemini 2.5 Flash Preview
Gemini 2.5 Flash PreviewRunner-up

Not enough votes to call it. On the specs, DeepSeek V4.1 Flash has the edge: bigger model tier, newer.

Too close to call
API pricing

Cost per 1M tokens

DeepSeek V4.1 Flash
Input
$0.15
Output
$0.60
Gemini 2.5 Flash Preview
Input
$0.15
Output
$0.60
Where to run it

23 hosts, cheapest first

DeepSeek V4.1 Flash23 hosts
HostInOutContextUptime
MMorph$0.12 in·$0.48 out·1M·98.4% upRRelacefp4$0.13 in·$0.52 out·1M·99.9% upSSail Researchfp4$0.13 in·$0.75 out·1M·99.9% upDDeepInfrafp8$0.14 in·$0.42 out·1M·99.7% upAlibaba Cloud$0.15 in·$0.60 out·1M·99.9% upDeepSeek$0.15 in·$0.60 out·1M·100% up
17 more hostsFewer hosts
SStreamLakefp8$0.15 in·$0.60 out·1M·99.5% upWWafer$0.20 in·$0.60 out·1M·99.8% upCCoreWeavefp8$0.20 in·$0.65 out·1M·99.1% upOOpenInferencefp4$0.20 in·$0.80 out·1M·99.4% upFFireworks$0.22 in·$0.66 out·1M·98.4% upPPhala$0.28 in·$1.10 out·1M·99.4% upGGMI Cloudfp8$0.28 in·$1.14 out·1M·99.7% upNNovitafp8$0.28 in·$1.14 out·1M·100% upAAtlasCloudfp8$0.30 in·$1.20 out·1M·99.8% upBBasetenfp8$0.30 in·$1.20 out·1M·98.2% upMMakora$0.30 in·$1.20 out·1M·98.7% upModal$0.30 in·$1.20 out·1M·99.8% upPParasailfp8$0.30 in·$1.20 out·1M·93% upSSiliconFlowfp8$0.30 in·$1.20 out·1M·99.8% upTTogether$0.30 in·$1.20 out·1M·100% upVVenicefp8$0.38 in·$1.50 out·1M·94.5% upDDigitalOceandegraded$0.30 in·$1.20 out·1M·98.1% up
Gemini 2.5 Flash Preview

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

DeepSeek V4.1 Flash is developed by DeepSeek while Gemini 2.5 Flash Preview is developed by Google AI. DeepSeek V4.1 Flash has a 1.0M token context window vs Gemini 2.5 Flash Preview'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. DeepSeek V4.1 Flash and Gemini 2.5 Flash Preview 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.

DeepSeek V4.1 Flash costs $0.15/M input tokens and Gemini 2.5 Flash Preview costs $0.15/M input tokens. Gemini 2.5 Flash Preview is $0.00/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 Gemini 2.5 Flash Preview 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

Against the newest arrivals

DeepSeek V4.1 Flash logoDeepSeek V4 Flash Vision Exp logo
DeepSeek V4.1 Flash vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
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Gemini 2.5 Flash Preview vs Solar Pro 4Landed Sep 2026
DeepSeek V4.1 Flash logoHy3 logo
DeepSeek V4.1 Flash vs Hy3Landed Sep 2026
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Gemini 2.5 Flash Preview vs Qwen3.7 FlashLanded Sep 2026
DeepSeek V4.1 Flash logoLing 3.0 Flash logo
DeepSeek V4.1 Flash vs Ling 3.0 FlashLanded Sep 2026
Gemini 2.5 Flash Preview logoMuse Glimmer 30B logo
Gemini 2.5 Flash Preview vs Muse Glimmer 30BLanded Sep 2026
DeepSeek V4.1 Flash logoGLM 5.3 logo
DeepSeek V4.1 Flash vs GLM 5.3Landed Sep 2026
Gemini 2.5 Flash Preview logoTernary Bonsai 2 27B logo
Gemini 2.5 Flash Preview vs Ternary Bonsai 2 27BLanded Sep 2026

Same lab, same size, long tail

DeepSeek V4.1 Flash logoDeepSeek V4 Pro 0813 logo
DeepSeek V4.1 Flash vs DeepSeek V4 Pro 0813Same lab
DeepSeek V4.1 Flash logoDeepSeek V4 Flash 0731 logo
DeepSeek V4.1 Flash vs DeepSeek V4 Flash 0731Same lab
Gemini 2.5 Flash Preview logoGemini 3.8 Flash logo
Gemini 2.5 Flash Preview vs Gemini 3.8 FlashSame lab
Gemini 2.5 Flash Preview logoGemini 3.7 Flash logo
Gemini 2.5 Flash Preview vs Gemini 3.7 FlashVersion compare
DeepSeek V4.1 Flash logoClaude Haiku 4.5 logo
DeepSeek V4.1 Flash vs Claude Haiku 4.5Same size
DeepSeek V4.1 Flash logoClaude Opus 4 logo
DeepSeek V4.1 Flash vs Claude Opus 4New provider
DeepSeek V4.1 Flash logoClaude Opus 4.1 logo
DeepSeek V4.1 Flash vs Claude Opus 4.1New provider
DeepSeek V4.1 Flash logoClaude Opus 4.5 logo
DeepSeek V4.1 Flash vs Claude Opus 4.5New provider

Model pages

DeepSeek V4.1 Flash logo
DeepSeek V4.1 Flash6 outputs, specs and price
Gemini 2.5 Flash Preview logo
Gemini 2.5 Flash Preview28 outputs, specs and price
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