What is the difference between DeepSeek V4 Flash 0731 and Gemini 3.1 Pro Preview?

DeepSeek V4 Flash 0731 is developed by DeepSeek while Gemini 3.1 Pro Preview is developed by Google AI. DeepSeek V4 Flash 0731 has a 1.0M token context window vs Gemini 3.1 Pro Preview's 1.0M. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek V4 Flash 0731 or Gemini 3.1 Pro Preview?

It depends on your use case. DeepSeek V4 Flash 0731 and Gemini 3.1 Pro Preview each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does DeepSeek V4 Flash 0731 cost compared to Gemini 3.1 Pro Preview?

DeepSeek V4 Flash 0731 costs $0.14/M input tokens and Gemini 3.1 Pro Preview costs $2/M input tokens. DeepSeek V4 Flash 0731 is $1.86/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 Flash 0731 and Gemini 3.1 Pro Preview on Rival?

This page shows a side-by-side comparison of DeepSeek V4 Flash 0731 and Gemini 3.1 Pro 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.

What is the difference between DeepSeek V4 Flash 0731 and Gemini 3.1 Pro Preview?

DeepSeek V4 Flash 0731 is developed by DeepSeek while Gemini 3.1 Pro Preview is developed by Google AI. DeepSeek V4 Flash 0731 has a 1.0M token context window vs Gemini 3.1 Pro Preview's 1.0M. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek V4 Flash 0731 or Gemini 3.1 Pro Preview?

It depends on your use case. DeepSeek V4 Flash 0731 and Gemini 3.1 Pro Preview each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does DeepSeek V4 Flash 0731 cost compared to Gemini 3.1 Pro Preview?

DeepSeek V4 Flash 0731 costs $0.14/M input tokens and Gemini 3.1 Pro Preview costs $2/M input tokens. DeepSeek V4 Flash 0731 is $1.86/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 Flash 0731 and Gemini 3.1 Pro Preview on Rival?

This page shows a side-by-side comparison of DeepSeek V4 Flash 0731 and Gemini 3.1 Pro 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.

DeepSeek V4 Flash 0731 vs Gemini 3.1 Pro Preview: Which Is Better?

Updated Jul 2026

Our Verdict

DeepSeek V4 Flash 0731

Gemini 3.1 Pro Preview

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

DeepSeek V4 Flash 0731 is 43x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

DeepSeek V4 Flash 0731

Input

$0.14

14× cheaper

Output

$0.28

43× cheaper

Gemini 3.1 Pro Preview

Input

$2.00

Output

$12.00

DeepSeek V4 Flash 0731 is cheaper on both — 14× input, 43× output

Writing DNA

Style Comparison

Similarity

71%

Gemini 3.1 Pro Preview uses 3.9x more transitions

DeepSeek V4 Flash 0731

Gemini 3.1 Pro Preview

52%Vocabulary54%

18wSentence Length18w

0.38Hedging0.29

5.7Bold4.9

3.4Lists3.3

0.00Emoji0.00

0.83Headings0.72

0.04Transitions0.14

Based on 23 + 23 text responses

Research

What we learned reading every model

DeepSeek V4 Flash 0731 and Gemini 3.1 Pro Preview have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

DeepSeek V4 Flash 0731 vs MiniMax M3New provider

DeepSeek V4 Flash 0731 vs Gemini 3.6 FlashCross-provider

DeepSeek V4 Flash 0731 vs GPT-5New provider

Updated Jul 2026

Our Verdict

DeepSeek V4 Flash 0731

Gemini 3.1 Pro Preview

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

DeepSeek V4 Flash 0731 is 43x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

DeepSeek V4 Flash 0731

Input

$0.14

14× cheaper

Output

$0.28

43× cheaper

Gemini 3.1 Pro Preview

Input

$2.00

Output

$12.00

DeepSeek V4 Flash 0731 is cheaper on both — 14× input, 43× output

Writing DNA

Style Comparison

Similarity

71%

Gemini 3.1 Pro Preview uses 3.9x more transitions

DeepSeek V4 Flash 0731

Gemini 3.1 Pro Preview

52%Vocabulary54%

18wSentence Length18w

0.38Hedging0.29

5.7Bold4.9

3.4Lists3.3

0.00Emoji0.00

0.83Headings0.72

0.04Transitions0.14

Based on 23 + 23 text responses

Research

What we learned reading every model

DeepSeek V4 Flash 0731 and Gemini 3.1 Pro Preview have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

DeepSeek V4 Flash 0731 vs MiniMax M3New provider

DeepSeek V4 Flash 0731 vs Gemini 3.6 FlashCross-provider

DeepSeek V4 Flash 0731 vs GPT-5New provider