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  5. DeepSeek V4.1 FlashvsGPT-6 Sol Pro
Updated Sep 2026

DeepSeek V4.1 FlashvsGPT-6 Sol Pro

DeepSeek V4.1 Flash is cheaper than GPT-6 Sol Pro at $0.15/M vs $2/M input tokens.

DeepSeek V4.1 Flash and GPT-6 Sol Pro compared across 6 shared prompts
SpecDeepSeek V4.1 FlashGPT-6 Sol Pro
Input price$0.15/M tokens$2/M tokens
Output price$0.6/M tokens$10/M tokens
Context window1.0M tokens1.1M tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedSep 2026Sep 2026
Our Verdict
DeepSeek V4.1 Flash
DeepSeek V4.1 Flash
GPT-6 Sol Pro
GPT-6 Sol Pro

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

DeepSeek V4.1 Flash costs 17x 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
17× cheaper
GPT-6 Sol Pro
Input
$2.00
Output
$10.00

DeepSeek V4.1 Flash is cheaper on both: 13× input, 17× output.

Where to run it

28 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
GPT-6 Sol Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$2.00 in·$10.00 out·1.1M·99.9% upOpenAI$2.00 in·$10.00 out·1.1M·100% 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 GPT-6 Sol Pro is developed by OpenAI. DeepSeek V4.1 Flash has a 1.0M token context window vs GPT-6 Sol Pro's 1.1M. 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 GPT-6 Sol Pro 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 GPT-6 Sol Pro 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 GPT-6 Sol Pro 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
GPT-6 Sol Pro logo
GPT-6 Sol Pro20 outputs, specs and price
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