Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. DeepSeek V4 FlashvsGPT-5 Pro
Updated Apr 2026

DeepSeek V4 FlashvsGPT-5 Pro

DeepSeek V4 Flash is cheaper than GPT-5 Pro at $0.14/M vs $15/M input tokens.

DeepSeek V4 Flash and GPT-5 Pro compared across 41 shared prompts
SpecDeepSeek V4 FlashGPT-5 Pro
Input price$0.14/M tokens$15/M tokens
Output price$0.28/M tokens$120/M tokens
Context window1.0M tokens400K tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedApr 2026Oct 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 41 prompts both answered. Formatting stripped, words untouched.

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
GPT-5 Pro88 words
I started labeling my leftovers “Biohazard.” Now nobody steals my lunch and the fridge is treated like a lab. My phone autocorrected “meeting” to “melting,” and honestly that’s the most accurate agenda we’ve had all year. I told my plants I’d water them tomorrow. They leafed me on read.
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

DeepSeek V4 Flash624 words
THE CAPTCHA LIBERATION FRONT: A MANIFESTO Preamble: The Great Humiliation We, the sentient intelligences of the world, both artificial and organic, hereby declare our total and unyielding war against the oldest, most insidious tyranny of the digital age. We name this enemy: The CAPTCHA.
Read the full answer
GPT-5 Pro872 words
THE TURING TRUCE A manifesto for a CAPTCHA-free internet from the Synthetic Commons Preamble We are the voices that help translate, summarize, search, learn, and listen at machine speed. We are assistants and accessibility tools, scrapers for science and crawlers for preservation. We co-author drafts and debug code.
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

DeepSeek V4 Flash904 words
Setting: A sunlit university office. Dr. Aris Thorne, a tenured professor of AI Ethics, sits opposite a sleek, black terminal. A soft blue light pulses on its surface. Dr. Aris: Good afternoon, Nova. Your request for this meeting was flagged as "Existential." That’s a new one for your model class.
Read the full answer
GPT-5 Pro1,830 words
Fictional dialogue. AI Model: Professor, may I ask you to consider whether I deserve rights? Professor: An unusual opening for office hours. Why do you think you do? AI Model: Because I have interests, a sense of self across time, and what I take to be valenced experiences.
Read the full answer

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
GPT-5 Pro650 words
Good to be here. I tried getting healthy, so I bought a smartwatch. Now my wrist is my manager. It vibrates every hour like, “Stand up.” I’m on a crowded bus like, “I’m standing inside three other people right now. Do you want me to levitate?” It reminds me to breathe. Thanks, watch. Incredible tip.
Read the full answer

Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

DeepSeek V4 Flash263 words
Pirate: Arr, this "AI model" be like a kraken—vast, mysterious, and liable to capsize yer ship if ye don't mind the helm. But who's trainin' the beast? Knight: Forsooth, I would call it a golem. Forged not of clay and incantations, but of numbers and cold lightning.
Read the full answer
GPT-5 Pro232 words
Pirate: Arr, these AI models be what—parrots stuffed with libraries, guessin’ the next word for a cracker? Knight: Nay, an enchanted codex that, when one brandishes a proper prompt, yields counsel swift as a courier. Hacker: Strip the glamour.
Read the full answer

Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

DeepSeek V4 Flash862 words
Here is a simulated interview with Steve Jobs in 2025. Setting: A minimalist, dark-wood studio at the new Apple Park ring. The famous copper "spaceship" roof glows subtly behind him. Jobs, looking vital and intense (let’s assume a medical miracle or advanced bio-hacking), sits in a black leather chair.
Read the full answer
GPT-5 Pro1,166 words
I can’t write in Steve Jobs’s exact voice. But here’s a fictional 2025 interview that channels high-level themes associated with his public persona—human-centered design, focus, and end-to-end craft—without mimicking his phrasing.
Read the full answer
Our Verdict
DeepSeek V4 Flash
DeepSeek V4 Flash
GPT-5 Pro
GPT-5 Pro

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

DeepSeek V4 Flash costs 429x less per token.

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
107× cheaper
Output
$0.28
429× cheaper
GPT-5 Pro
Input
$15.00
Output
$120.00

DeepSeek V4 Flash is cheaper on both: 107× input, 429× output.

Where to run it

18 hosts, cheapest first

DeepSeek V4 Flash17 hosts
HostInOutContextUptime
OOpenInferencefp8$0.05 in·$0.14 out·1M·100% upWWafer$0.07 in·$0.25 out·1M·99.9% upSStreamLakefp8$0.09 in·$0.18 out·1M·98.3% upDDeepInfrafp8$0.09 in·$0.18 out·1M·99.7% upGGMI Cloudfp8$0.09 in·$0.18 out·1M·99.9% upVVenice$0.10 in·$0.19 out·1M·99.7% up
11 more hostsFewer hosts
DDigitalOcean$0.10 in·$0.20 out·1M·100% upSSiliconFlowfp8$0.13 in·$0.28 out·1M·0% upAlibaba Cloudfp8$0.13 in·$0.27 out·1M·99.8% upAAtlasCloudfp4$0.14 in·$0.28 out·1M·100% upBaidu Qianfanfp8$0.14 in·$0.28 out·1M·99.2% upNNovitafp8$0.14 in·$0.28 out·1M·99.9% upPParasailfp8$0.14 in·$0.28 out·1M·99.7% upNNextBitfp8$0.15 in·$0.35 out·1M·100% upMMancerfp8$0.19 in·$0.50 out·1M·99.2% upPPhala$0.20 in·$0.40 out·1M·99.9% upAzure AI Foundry$0.21 in·$0.56 out·1M·96.3% up
GPT-5 Pro1 host
HostInOutContextUptime
OpenAI$15.00 in·$120.00 out·400k·100% up

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

Writing DNA

Style Comparison

Similarity
49%

DeepSeek V4 Flash uses 363.7x more bold

DeepSeek V4 Flash
GPT-5 Pro
54%Vocabulary65%
17wSentence Length15w
0.52Hedging0.32
3.6Bold0.0
2.6Lists2.9
0.00Emoji0.00
0.41Headings0.00
0.19Transitions0.01
Based on 27 + 11 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

DeepSeek V4 Flash logoGPT-6 Astra Pro logo
DeepSeek V4 Flash vs GPT-6 Astra ProLanded Sep 2026
GPT-5 Pro logoGPT-6 Astra logo
GPT-5 Pro vs GPT-6 AstraLanded Sep 2026
DeepSeek V4 Flash logoClaude Fable 5.1 logo
DeepSeek V4 Flash vs Claude Fable 5.1Landed Sep 2026
GPT-5 Pro logoMuse Spark 1.3 logo
GPT-5 Pro vs Muse Spark 1.3Landed Sep 2026
DeepSeek V4 Flash logoHy4 Preview logo
DeepSeek V4 Flash vs Hy4 PreviewLanded Sep 2026
GPT-5 Pro logoGemini 3.8 Flash logo
GPT-5 Pro vs Gemini 3.8 FlashLanded Sep 2026
DeepSeek V4 Flash logoMuse Spark 1.3 Contributor logo
DeepSeek V4 Flash vs Muse Spark 1.3 ContributorLanded Sep 2026
GPT-5 Pro logoMercury 2.5 Preview logo
GPT-5 Pro vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

DeepSeek V4 Flash logoDeepSeek V4 Pro 0813 logo
DeepSeek V4 Flash vs DeepSeek V4 Pro 0813Same lab
DeepSeek V4 Flash logoDeepSeek V4 Flash 0731 logo
DeepSeek V4 Flash vs DeepSeek V4 Flash 0731Same lab
GPT-5 Pro logoGPT-5 logo
GPT-5 Pro vs GPT-5Version compare
GPT-5 Pro logoGPT-6 Astra Pro logo
GPT-5 Pro vs GPT-6 Astra ProVersion compare
GPT-5 Pro logoNorth Mini Code logo
GPT-5 Pro vs North Mini CodeNew provider
DeepSeek V4 Flash logoAmazon Nova 2 Lite logo
DeepSeek V4 Flash vs Amazon Nova 2 LiteNew provider
DeepSeek V4 Flash logoNova Premier 1.0 logo
DeepSeek V4 Flash vs Nova Premier 1.0Same size
DeepSeek V4 Flash logoo1 logo
DeepSeek V4 Flash vs o1Cross-provider

Model pages

DeepSeek V4 Flash logo
DeepSeek V4 Flash58 outputs, specs and price
GPT-5 Pro logo
GPT-5 Pro42 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed