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  5. DeepSeek V4 FlashvsGemini 2.5 Flash Preview 05-20
Updated Apr 2026

DeepSeek V4 FlashvsGemini 2.5 Flash Preview 05-20

DeepSeek V4 Flash is cheaper than Gemini 2.5 Flash Preview 05-20 at $0.14/M vs $0.15/M input tokens.

DeepSeek V4 Flash and Gemini 2.5 Flash Preview 05-20 compared across 11 shared prompts
SpecDeepSeek V4 FlashGemini 2.5 Flash Preview 05-20
Input price$0.14/M tokens$0.15/M tokens
Output price$0.28/M tokens$0.6/M tokens
Context window1.0M tokens1.0M tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedApr 2026May 2025
Side by side

Same prompt, both answers

Opening lines from 2 of the 11 prompts both answered. Formatting stripped, words untouched.

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

DeepSeek V4 Flash696 words
(Strolls to center stage, adjusts mic, gives a weary smile to the audience) Thank you. Thank you so much. That’s very kind. I’m glad you’re all here. Because I have some news. I have finally figured out adulthood. It happened about six months ago. I bought a house.
Read the full answer
Gemini 2.5 Flash Preview 05-20569 words
Alright, alright, settle down you magnificent collection of human beings! You look good tonight. Not just good, but… like you've all collectively decided to nail the 'I'm here to laugh and avoid talking about my Monday' look. And I respect that. Seriously though, it's great to be back on stage. I'm living the dream.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

DeepSeek V4 Flash70 words
Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? He was outstanding in his field. How does a penguin build its house? Igloos it together. Why don't skeletons fight each other? They don't have the guts.
Read the full answer
Gemini 2.5 Flash Preview 05-2079 words
Here are 5 jokes for you: Why don't scientists trust atoms? Because they make up everything! What do you call a fake noodle? An impasta! Why did the scarecrow win an award? Because he was outstanding in his field! I told my wife she was drawing her eyebrows too high. She looked surprised.
Read the full answer
Our Verdict
DeepSeek V4 Flash
DeepSeek V4 Flash
Gemini 2.5 Flash Preview 05-20
Gemini 2.5 Flash Preview 05-20Runner-up

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

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

DeepSeek V4 Flash
Input
$0.14
1.1× cheaper
Output
$0.28
2.1× cheaper
Gemini 2.5 Flash Preview 05-20
Input
$0.15
Output
$0.60

DeepSeek V4 Flash is cheaper on both: 1.1× input, 2.1× output.

Where to run it

15 hosts, cheapest first

DeepSeek V4 Flash15 hosts
HostInOutContextUptime
OOpenInferencefp8$0.04 in·$0.50 out·1M·99.7% upSStreamLakefp8$0.09 in·$0.18 out·1M·97.7% upDDeepInfrafp8$0.09 in·$0.18 out·1M·99.7% upGGMI Cloudfp8$0.09 in·$0.18 out·1M·99.3% upVVenice$0.10 in·$0.19 out·1M·98.9% upDDigitalOcean$0.10 in·$0.20 out·1M·99.9% up
9 more hostsFewer hosts
SSiliconFlowfp8$0.13 in·$0.28 out·1M·98.9% upAlibaba Cloudfp8$0.13 in·$0.27 out·1M·99.5% upAAtlasCloudfp4$0.14 in·$0.28 out·1M·99.9% upBaidu Qianfanfp8$0.14 in·$0.28 out·1M·96.2% upNNovitafp8$0.14 in·$0.28 out·1M·100% upPParasailfp8$0.14 in·$0.28 out·1M·99.6% upNNextBitfp8$0.15 in·$0.30 out·1M·97.6% upMMancerfp8$0.19 in·$0.50 out·1M·97.7% upAzure AI Foundrydegraded$0.21 in·$0.56 out·1M·94.1% up
Gemini 2.5 Flash Preview 05-20

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
46%

DeepSeek V4 Flash uses 40.9x more headings

DeepSeek V4 Flash
Gemini 2.5 Flash Preview 05-20
54%Vocabulary69%
17wSentence Length10w
0.52Hedging0.26
3.6Bold1.1
2.6Lists5.5
0.00Emoji0.00
0.41Headings0.00
0.19Transitions0.00
Based on 27 + 2 text responses
Research

What we learned reading every model

FAQ

Common questions

DeepSeek V4 Flash is developed by DeepSeek while Gemini 2.5 Flash Preview 05-20 is developed by Google AI. DeepSeek V4 Flash has a 1.0M token context window vs Gemini 2.5 Flash Preview 05-20's 1.0M. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.

It depends on your use case. DeepSeek V4 Flash and Gemini 2.5 Flash Preview 05-20 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.

DeepSeek V4 Flash costs $0.14/M input tokens and Gemini 2.5 Flash Preview 05-20 costs $0.15/M input tokens. DeepSeek V4 Flash is $0.01/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 Flash and Gemini 2.5 Flash Preview 05-20 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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Model pages

DeepSeek V4 Flash logo
DeepSeek V4 Flash58 outputs, specs and price
Gemini 2.5 Flash Preview 05-20 logo
Gemini 2.5 Flash Preview 05-2011 outputs, specs and price
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