What is the difference between DeepSeek Prover V2 and DeepSeek V4 Flash?

Both are developed by DeepSeek but target different use cases. DeepSeek Prover V2 has a 164K token context window vs DeepSeek V4 Flash's 1.0M. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek Prover V2 or DeepSeek V4 Flash?

It depends on your use case. DeepSeek Prover V2 and DeepSeek V4 Flash 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.

How much does DeepSeek Prover V2 cost compared to DeepSeek V4 Flash?

DeepSeek Prover V2 costs $0/M input tokens and DeepSeek V4 Flash costs $0.14/M input tokens. DeepSeek Prover V2 is $0.14/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 Prover V2 and DeepSeek V4 Flash on Rival?

This page shows a side-by-side comparison of DeepSeek Prover V2 and DeepSeek V4 Flash 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 Apr 2026

DeepSeek Prover V2vsDeepSeek V4 Flash

DeepSeek Prover V2 is cheaper than DeepSeek V4 Flash at $0/M vs $0.14/M input tokens.

DeepSeek Prover V2 and DeepSeek V4 Flash compared across 6 shared prompts
Spec	DeepSeek Prover V2	DeepSeek V4 Flash
Input price	Free	$0.14/M tokens
Output price	Free	$0.28/M tokens
Context window	164K tokens	1.0M tokens
Weights	Open	Open
Free API (OpenRouter)	No	No
Released	Apr 2025	Apr 2026

Our Verdict

DeepSeek Prover V2

DeepSeek V4 Flash

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

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

DeepSeek Prover V2

Input

$0.000

Output

$0.000

DeepSeek V4 Flash

Input

$0.14

Output

$0.28

Where to run it

17 hosts, cheapest first

DeepSeek Prover V2

No hosts listed on OpenRouter.

DeepSeek V4 Flash17 hosts

HostInOutContextUptime

OpenInferencefp8$0.05 in$0.14 out1M100% up Wafer$0.07 in$0.25 out1M99.9% up StreamLakefp8$0.09 in$0.18 out1M98.3% up DeepInfrafp8$0.09 in$0.18 out1M99.7% up GMI Cloudfp8$0.09 in$0.18 out1M99.9% up Venice$0.10 in$0.19 out1M99.7% up

11 more hosts

DigitalOcean$0.10 in$0.20 out1M100% up SiliconFlowfp8$0.13 in$0.28 out1M0% up Alibaba Cloudfp8$0.13 in$0.27 out1M99.8% up AtlasCloudfp4$0.14 in$0.28 out1M100% up Baidu Qianfanfp8$0.14 in$0.28 out1M99.2% up Novitafp8$0.14 in$0.28 out1M99.9% up Parasailfp8$0.14 in$0.28 out1M99.7% up NextBitfp8$0.15 in$0.35 out1M100% up Mancerfp8$0.19 in$0.50 out1M99.2% up Phala$0.20 in$0.40 out1M99.9% up Azure AI Foundry$0.21 in$0.56 out1M96.3% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity

54%

DeepSeek V4 Flash uses 52.5x more hedging

DeepSeek Prover V2

DeepSeek V4 Flash

47%Vocabulary54%

8wSentence Length17w

0.00Hedging0.52

3.1Bold3.6

0.0Lists2.6

0.00Emoji0.00

0.35Headings0.41

0.19Transitions0.19

Based on 1 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

17 hosts, cheapest first

Style Comparison

What we learned reading every model

Common questions

What is the difference between DeepSeek Prover V2 and DeepSeek V4 Flash?

Which is better, DeepSeek Prover V2 or DeepSeek V4 Flash?

How much does DeepSeek Prover V2 cost compared to DeepSeek V4 Flash?

How can I compare DeepSeek Prover V2 and DeepSeek V4 Flash on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

17 hosts, cheapest first

Style Comparison

What we learned reading every model

Common questions

What is the difference between DeepSeek Prover V2 and DeepSeek V4 Flash?

Which is better, DeepSeek Prover V2 or DeepSeek V4 Flash?

How much does DeepSeek Prover V2 cost compared to DeepSeek V4 Flash?

How can I compare DeepSeek Prover V2 and DeepSeek V4 Flash on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages