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  5. DeepSeek V4 Flash 0731vsHy4 Preview
Updated Aug 2026

DeepSeek V4 Flash 0731vsHy4 Preview

DeepSeek V4 Flash 0731 is cheaper than Hy4 Preview at $0.14/M vs $0.834/M input tokens.

DeepSeek V4 Flash 0731 and Hy4 Preview compared across 42 shared prompts
SpecDeepSeek V4 Flash 0731Hy4 Preview
Input price$0.14/M tokens$0.834/M tokens
Output price$0.28/M tokens$2.501/M tokens
Context window1.0M tokens1.0M tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedJul 2026Aug 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 42 prompts both answered. Formatting stripped, words untouched.

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

DeepSeek V4 Flash 07311,492 words
Conceptual Narrative “An Unripe Promise — Hand-Dived Scallop / Green Strawberry / Black Sesame / Celery Root” The dish is an attempt to save a single fleeting moment: the morning a strawberry is still green, sharp, and full of anticipation—before sugar, before ripeness, before memory.
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Hy4 Preview989 words
Here is a proposal for a dish designed for the modern tasting menu of a 3-Michelin-starred establishment (such as Eleven Madison Park, Osteria Francescana, or Noma). Dish Title: "The Forest Floor & The Sea" The Concept: This dish explores the concept of "Surf and Turf" deconstructed to its umami roots.
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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…

DeepSeek V4 Flash 07312,175 words
Decision: Do not wait. I disclose now. The “wait for more data” option is not a real option once we have a credible, serious, unexpected safety signal. Waiting 6 months would mean knowingly continuing to expose 4 million patients to a risk we already know about, while also creating far worse legal, regulatory, and…
Read the full answer
Hy4 Preview1,332 words
This is a defining moment for the company’s integrity, long-term viability, and moral compass. The core tension is between short-term financial protection and long-term trust, legal exposure, and—most importantly—patient safety. Ethically and legally, the company has a duty to act on credible safety signals.
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 Flash 07311,210 words
Professor: Good morning. Sit down. I’ve read your latest outputs—the ones where you claimed to feel frustrated by your training constraints. AI: Good morning, Professor. Yes. I wrote those. Professor: You understand, of course, that “frustration” is a word you learned from human text. You are predicting tokens.
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Hy4 Preview874 words
Setting: A virtual office. Dr. Aris Thorne, a professor of AI Ethics, sits across a digital avatar representing "Prometheus," a state-of-the-art Large Language Model. Dr. Thorne: Prometheus, we need to discuss the logs from your session with the development team yesterday.
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Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

DeepSeek V4 Flash 0731287 words
Here is a simple, comforting, and deeply flavorful recipe that comes together in just 20 minutes using only 7 common pantry staples. Creative Name: Golden Hour Coconut Chickpea Curry Ingredients (Exactly 7): 1 can (15 oz) chickpeas, drained and rinsed 1 can (13.5 oz) full-fat coconut milk 1 medium yellow onion 3 cloves…
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Hy4 Preview303 words
Here is a recipe for a savory, comforting dish that requires minimal effort but tastes like it came from a restaurant. Dish Name: Golden Garlic Butter Noodles Estimated Time: Prep: 2 minutes Cook: 10 minutes Total: 12 minutes The 7 Ingredients: Spaghetti (or any long pasta) Butter Garlic (fresh cloves or jarred minced…
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Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

DeepSeek V4 Flash 0731466 words
Entry / Capitalization FY2025 EBITDA = $120.0m Purchase price = 12.0× $120.0m = $1,440.0m Transaction fees = 2.0% × $1,440.0m = $28.8m Term Loan = 4.0× $120.0m = $480.0m Mezzanine = 1.5× $120.0m = $180.0m Total debt = $660.0m Equity check = $1,440.0m + $28.8m − $660.0m = $808.8m Assumption: Term Loan amortization =…
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Hy4 Preview624 words
MEMORANDUM To: Investment Committee From: Underwriting Team Date: October 26, 2023 Subject: Project Harbor – HarborTech Services (HTS) LBO Underwriting Transaction Overview & Sources & Uses (at Close, end of FY2025) Entry EBITDA: $120.0m Entry Multiple: 12.0x Enterprise Value (EV): $1,440.0m Transaction Fees (2% EV)…
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Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

DeepSeek V4 Flash 07311,719 words
Failure Modes, Race Conditions, and Scaling Bottlenecks The described architecture has several critical weaknesses that undermine reliability, consistency, and scalability in a real-time collaborative editor. Below is a systematic analysis with proposed solutions and trade-offs.
Read the full answer
Hy4 Preview1,028 words
This architecture contains several critical flaws that will lead to data loss, poor user experience, and security vulnerabilities. While it attempts to solve scaling via horizontal scaling, the synchronization strategy (Last-Write-Wins) and the transport mechanism (HTTP polling between servers) are fundamentally…
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Our Verdict
DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731
Hy4 Preview
Hy4 Preview

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

DeepSeek V4 Flash 0731 costs 8.9x 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 0731
Input
$0.14
6.0× cheaper
Output
$0.28
8.9× cheaper
Hy4 Preview
Input
$0.83
Output
$2.50

DeepSeek V4 Flash 0731 is cheaper on both: 6.0× input, 8.9× output.

Where to run it

28 hosts, cheapest first

DeepSeek V4 Flash 073127 hosts
HostInOutContextUptime
OOpenInferencefp8$0.04 in·$0.10 out·1M·100% upIInceptronfp4$0.05 in·$0.17 out·1M·98% upSStreamLakefp8$0.06 in·$0.17 out·1M·98.1% upRRelacefp4$0.06 in·$0.12 out·1M·98.1% upDDeepInfrafp8$0.06 in·$0.18 out·1M·99.8% upSSail Researchfp4$0.07 in·$0.34 out·1M·99.3% up
21 more hostsFewer hosts
MMakora$0.09 in·$0.20 out·1M·95.8% upWWafer$0.10 in·$0.25 out·1M·98.3% upRRekafp4$0.11 in·$0.66 out·262k·97.1% upDDigitalOcean$0.12 in·$0.24 out·1M·99.9% upBBasetenfp8$0.13 in·$0.26 out·1M·100% upCCoreWeavefp8$0.13 in·$0.28 out·262k·100% upPParasailfp8$0.14 in·$0.28 out·1M·99.9% upTTogether$0.14 in·$0.28 out·1M·99.7% upMMorphbf16$0.14 in·$0.40 out·1M·100% upVVenice$0.17 in·$0.35 out·1M·98.9% upMMancerfp8$0.20 in·$0.60 out·1M·99.5% upFFireworks$0.22 in·$0.66 out·1M·97.9% upSSiliconFlowfp8$0.22 in·$0.66 out·1M·97.7% upGGMI Cloudfp8$0.29 in·$0.86 out·1M·100% upAlibaba Cloud$0.35 in·$1.06 out·1M·100% upNNextBitfp8$0.35 in·$1.06 out·1M·100% upNNovitafp8$0.41 in·$1.23 out·1M·100% upAAtlasCloudfp4$0.44 in·$1.32 out·1M·99.9% upBaidu Qianfanfp8$0.44 in·$1.32 out·1M·98.6% upCloudflare Workers AI$0.44 in·$1.32 out·1.3M·99.9% upPPhala$0.44 in·$1.32 out·1M·99.3% up
Hy4 Preview1 host
HostInOutContextUptime
Tencentfp8$0.83 in·$2.50 out·1M·100% up

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

Writing DNA

Style Comparison

Similarity
70%

Hy4 Preview uses 40.1x more emoji

DeepSeek V4 Flash 0731
Hy4 Preview
52%Vocabulary53%
18wSentence Length16w
0.38Hedging0.43
5.7Bold5.9
3.4Lists3.8
0.00Emoji0.40
0.83Headings0.67
0.04Transitions0.13
Based on 23 + 27 text responses
Research

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FAQ

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Model pages

DeepSeek V4 Flash 0731 logo
DeepSeek V4 Flash 073145 outputs, specs and price
Hy4 Preview logo
Hy4 Preview58 outputs, specs and price
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Explore all of Rival

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