What is the difference between DeepSeek V4.1 Flash and Solar Pro 3?

DeepSeek V4.1 Flash is developed by DeepSeek while Solar Pro 3 is developed by Upstage. DeepSeek V4.1 Flash has a 1.0M token context window vs Solar Pro 3's 128K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek V4.1 Flash or Solar Pro 3?

It depends on your use case. DeepSeek V4.1 Flash and Solar Pro 3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

How much does DeepSeek V4.1 Flash cost compared to Solar Pro 3?

DeepSeek V4.1 Flash costs $0.15/M input tokens and Solar Pro 3 costs $0/M input tokens. Solar Pro 3 is $0.15/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 DeepSeek V4.1 Flash and Solar Pro 3 on Rival?

This page shows a side-by-side comparison of DeepSeek V4.1 Flash and Solar Pro 3 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 Sep 2026

DeepSeek V4.1 FlashvsSolar Pro 3

Solar Pro 3 is cheaper than DeepSeek V4.1 Flash at $0/M vs $0.15/M input tokens.

DeepSeek V4.1 Flash and Solar Pro 3 compared across 2 shared prompts
Spec	DeepSeek V4.1 Flash	Solar Pro 3
Input price	$0.15/M tokens	Free
Output price	$0.6/M tokens	Free
Context window	1.0M tokens	128K tokens
Weights	Open	—
Free API (OpenRouter)	No	No
Released	Sep 2026	Jan 2026

Our Verdict

DeepSeek V4.1 Flash

Solar Pro 3Runner-up

Not enough votes to call it. On the specs, DeepSeek V4.1 Flash has the edge: newer, bigger context window, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

DeepSeek V4.1 Flash

Input

$0.15

Output

$0.60

Solar Pro 3

Input

$0.000

Output

$0.000

Where to run it

22 hosts, cheapest first

DeepSeek V4.1 Flash22 hosts

HostInOutContextUptime

Morph$0.12 in$0.48 out1M97.7% up Relacefp4$0.13 in$0.52 out1M99.8% up DeepInfrafp8$0.14 in$0.42 out1M99.7% up DeepSeek$0.15 in$0.60 out1M100% up Sail Researchfp4$0.20 in$0.60 out1M99.9% up Wafer$0.20 in$0.60 out1M99.8% up

16 more hosts

CoreWeavefp8$0.20 in$0.65 out1M99.5% up StreamLakefp8$0.22 in$0.88 out1M99.4% up Fireworks$0.22 in$0.66 out1M98.5% up Phala$0.28 in$1.10 out1M99.2% up GMI Cloudfp8$0.28 in$1.14 out1M98.9% up Novitafp8$0.28 in$1.14 out1M100% up Alibaba Cloud$0.30 in$1.20 out1M99.9% up AtlasCloudfp8$0.30 in$1.20 out1M99.4% up Basetenfp8$0.30 in$1.20 out1M98.4% up DigitalOcean$0.30 in$1.20 out1M98% up Makora$0.30 in$1.20 out1M98.2% up Modal$0.30 in$1.20 out1M99.9% up SiliconFlowfp8$0.30 in$1.20 out1M99.7% up Together$0.30 in$1.20 out1M99.9% up Venicefp8$0.38 in$1.50 out1M97.2% up Parasailfp8degraded$0.30 in$1.20 out1M92.4% up

Solar Pro 3

No hosts listed on OpenRouter.

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

Research

What we learned reading every model

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Cost per 1M tokens

22 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between DeepSeek V4.1 Flash and Solar Pro 3?

Which is better, DeepSeek V4.1 Flash or Solar Pro 3?

How much does DeepSeek V4.1 Flash cost compared to Solar Pro 3?

How can I compare DeepSeek V4.1 Flash and Solar Pro 3 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

22 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between DeepSeek V4.1 Flash and Solar Pro 3?

Which is better, DeepSeek V4.1 Flash or Solar Pro 3?

How much does DeepSeek V4.1 Flash cost compared to Solar Pro 3?

How can I compare DeepSeek V4.1 Flash and Solar Pro 3 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages