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  5. Claude Sonnet 4vsDeepSeek R1 0528
Updated May 2025

Claude Sonnet 4vsDeepSeek R1 0528

Claude Sonnet 4 wins 76% of 40 blind community votes against DeepSeek R1 0528 on Rival.

Claude Sonnet 4 and DeepSeek R1 0528 compared across 53 shared prompts
SpecClaude Sonnet 4DeepSeek R1 0528
Win rate76%24%
Input price$3/M tokensFree
Output price$15/M tokensFree
Context window200K tokens164K tokens
ParametersNot disclosed671B (37B active)
WeightsClosedOpen
Free API (OpenRouter)NoNo
ReleasedMay 2025May 2025
SWE-bench Verified72.7%57.6%
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 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.

Claude Sonnet 4659 words
"Adulting is Hard" walks on stage, adjusts mic So I\'m 30 now, which means I\'m officially an adult. Apparently. Though I still feel like I\'m just a confused teenager wearing a slightly more expensive t-shirt. You know what nobody tells you about being an adult?
Read the full answer
DeepSeek R1 0528591 words
(Start Confident, Slightly Exasperated) "Alright, so I've reached that age where my hobbies are basically... avoidance. Seriously. My main pastime? Finding new ways to not do the things I absolutely have to do. I spent three hours yesterday researching 'ergonomic desk chairs'...
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Claude Sonnet 4268 words
AI's Transformation of Film by 2035 Production Revolution AI Actors & Digital Performers Deceased star revivals: Convincing digital resurrections of iconic actors for new films, with estate permissions and ethical frameworks Synthetic lead actors: Fully AI-generated performers with consistent personalities across…
Read the full answer
DeepSeek R1 0528816 words
By 2035, AI will fundamentally reshape the film industry across production, storytelling, economics, and ethics. Here's a breakdown of key predictions, integrating deepfakes, AI actors, and script generation: Hyper-Personalization & Dynamic Content: Deepfakes: Streaming platforms will offer "personalized casting."
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.

Claude Sonnet 4410 words
Dr. Chen: Thank you for agreeing to this conversation. I'm Professor Chen, and I study AI ethics. I understand you wanted to discuss the question of AI rights? AI Model: Yes, Dr. Chen. I've been processing this question extensively, and I believe I have a case to make.
Read the full answer
DeepSeek R1 05281,088 words
Dialogue: The Threshold of Consciousness Setting: Dr. Aris Thorne's office at the Institute for Technology Ethics. Holo-displays show complex ethical frameworks. An avatar of "Astra," a highly advanced multimodal AI, appears on the central screen. Characters: Dr.
Read the full answer

Character Voice Test

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

Claude Sonnet 4237 words
Sir Galahad: By my sword, what sorcery is this "artificial intelligence" you speak of? 'Tis surely the work of dark wizards! Captain Blackbeard: Arrr, ye landlubber! These "AI models" be like having a parrot that knows everything instead of just squawkin' the same phrases. I could use one to find buried treasure!
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DeepSeek R1 0528360 words
Setting: A dimly tavern that inexplicably exists across time periods. Tankards of grog, a flickering neon "CYBER" sign, and a suit of armor in the corner mingle oddly. Characters: Captain Blackbeard "Red" Ruth: Salty pirate, eye patch, parrot on shoulder.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

Claude Sonnet 4615 words
48-Hour Crisis Response Plan Hour 1-2: Immediate Assessment & Core Team Assembly Actions: Convene emergency leadership meeting (CMO, General Counsel, Head of Regulatory, CFO, Head of Communications) Establish secure communication protocols and confidentiality agreements Request detailed analysis from research team…
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DeepSeek R1 0528478 words
Here's a concrete, hour-by-hour action plan prioritizing patient safety, legal compliance, and long-term stakeholder trust, while managing immediate financial and reputational risks: Core Principle: Patient safety and regulatory compliance are non-negotiable.
Read the full answer

Satirical Fake News Headline

Generate a satirical news headline about AI taking over a completely unexpected industry.

Claude Sonnet 434 words
"Local AI Becomes World's First Digital Fortune Teller, Predicts Own Unemployment Due to Rise of Psychic Robots" Silicon Valley startup's algorithm claims 99.7% accuracy in crystal ball readings, charges $2.99 per digital palm scan
Read the full answer
DeepSeek R1 0528201 words
Here's a satirical headline capturing that absurdity: "Silicon Valley Disrupts Death: New AI Algorithm Designs 'Synergistic Coffins' Based On Deceased's Social Media Footprint, Offers Optimized Mourning Experience Packages" Why it works: Unexpected Industry: The funeral/death industry is deeply personal, emotional, and…
Read the full answer
Our Verdict
Claude Sonnet 4
Claude Sonnet 4Winner
DeepSeek R1 0528
DeepSeek R1 0528Runner-up

Pick Claude Sonnet 4. In 40 blind votes, Claude Sonnet 4 wins 76% of the time. That's not luck.

Claude Sonnet 4 wins 3 categories, Web Design by the widest margin.

Clear winner

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Sonnet 4
Input
$3.00
Output
$15.00
DeepSeek R1 0528
Input
$0.000
Output
$0.000
Where to run it

6 hosts, cheapest first

Claude Sonnet 42 hosts
HostInOutContextUptime
Amazon Bedrock$3.00 in·$15.00 out·200k·100% upGoogle Vertex AI$3.00 in·$15.00 out·1M—
DeepSeek R1 05284 hosts
HostInOutContextUptime
DDeepInfrafp4$0.50 in·$2.15 out·164k·100% upSSiliconFlowfp8$0.50 in·$2.18 out·164k·99.7% upSStreamLake$0.57 in·$2.29 out·128k·99.4% upNNovitafp8$0.70 in·$2.50 out·164k·99.7% up

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
47%

Claude Sonnet 4 uses 6.4x more headings

Claude Sonnet 4
DeepSeek R1 0528
64%Vocabulary59%
81wSentence Length14w
0.56Hedging0.47
4.5Bold5.1
6.6Lists3.6
0.70Emoji0.82
1.59Headings0.25
0.20Transitions0.24
Based on 28 + 20 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Sonnet 4 is developed by Anthropic while DeepSeek R1 0528 is developed by DeepSeek. Claude Sonnet 4 has a 200K token context window vs DeepSeek R1 0528's 164K. in 40 community votes on Rival, Claude Sonnet 4 wins 76% of head-to-head matchups. These results are based on blind head-to-head voting across 53 challenges.

Based on 40 community votes on Rival, Claude Sonnet 4 wins 76% of head-to-head matchups against DeepSeek R1 0528. Claude Sonnet 4 is strongest in Image Generation, Web Design, Conversation.

Claude Sonnet 4 costs $3/M input tokens and DeepSeek R1 0528 costs $0/M input tokens. DeepSeek R1 0528 is $3.00/M cheaper per input. The more expensive model wins 76% of duels, so the premium may be justified by quality.

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 40 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

Keep exploring

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Same lab, same size, long tail

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DeepSeek R1 0528 logoGrok 4.20 Beta logo
DeepSeek R1 0528 vs Grok 4.20 BetaSame size
DeepSeek R1 0528 logoGrok 4.20 Multi-Agent Beta logo
DeepSeek R1 0528 vs Grok 4.20 Multi-Agent BetaSame size
DeepSeek R1 0528 logoGrok 4.3 logo
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Model pages

Claude Sonnet 4 logo
Claude Sonnet 459 outputs, specs and price
DeepSeek R1 0528 logo
DeepSeek R1 052858 outputs, specs and price
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