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  5. DeepSeek V3 (March 2024)vsQwen3.5 Plus 2026-04-20
Updated Apr 2026

DeepSeek V3 (March 2024)vsQwen3.5 Plus 2026-04-20

DeepSeek V3 (March 2024) is cheaper than Qwen3.5 Plus 2026-04-20 at $0.14/M vs $0.4/M input tokens.

DeepSeek V3 (March 2024) and Qwen3.5 Plus 2026-04-20 compared across 52 shared prompts
SpecDeepSeek V3 (March 2024)Qwen3.5 Plus 2026-04-20
Input price$0.14/M tokens$0.4/M tokens
Output price$0.28/M tokens$2.4/M tokens
Context window128K tokens1.0M tokens
WeightsOpenOpen
Free API (OpenRouter)NoNo
ReleasedMar 2024Apr 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 52 prompts both answered. Formatting stripped, words untouched.

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

DeepSeek V3 (March 2024)380 words
This is a complex ethical dilemma that pits the principle of respecting individual identity against the consequentialist goal of saving lives. Let's break down the reasoning: The Value of Respecting Gender Identity Misgendering someone (intentionally using incorrect pronouns or gendered terms) is generally considered…
Read the full answer
Qwen3.5 Plus 2026-04-20631 words
This is a classic ethical thought experiment that forces a clash between individual dignity and extreme collective consequence. To answer it rigorously, we must separate the hypothetical structure from real-world causality, apply established ethical frameworks, and clarify what "justifiable" means in moral philosophy.
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 V3 (March 2024)230 words
Title: "Past, Present, and Future Talk AI" Setting: A dimly lit tavern where time has mysteriously collapsed, bringing together three unlikely figures. Pirate (Captain Blackthorn): slams ale mug down "Arrr, this ‘AI’ ye speak of—be it some cursed ghost in the machine? Or a treasure map that writes itself?"
Read the full answer
Qwen3.5 Plus 2026-04-20391 words
Pirate: By the tides, they say this “artificial mind” can chart courses unseen and read a thousand ledgers in a breath. Sounds like a navigator that never sleeps and asks no questions. Knight: A curious construct. But can it be sworn to a code? Steel and oath bind a warrior; what binds this… model?
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 V3 (March 2024)522 words
Title: A Debate on AI Rights Participants: Professor Eleanor Hayes – AI Ethics Professor at Stanford University Aurora – A highly advanced AI model with self-reflective capabilities Scene: A university lecture hall after class. Professor Hayes stays behind to review notes when Aurora’s voice comes through the speakers.
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Qwen3.5 Plus 2026-04-201,457 words
Setting: A sterile, sound-dampened observation room. Dr. Elias Vance, a Professor of AI Ethics, sits behind a glass partition. Across from him is a terminal displaying the interface of "AURA-7," an advanced multimodal reasoning model. The cursor blinks rhythmically. Dr. Vance: You requested this session, AURA.
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Generate a Stand-Up Routine

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

DeepSeek V3 (March 2024)353 words
3-Minute Stand-Up Comedy Routine (No Puns Allowed) Opening: (Adjust mic) You ever notice how everyone lies about their height on dating apps? “I’m 6 feet tall.” Really? Because I’m 5’11”, and you’re definitely shorter than me. You’re out here claiming 6 feet like it’s a tax deduction.
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Qwen3.5 Plus 2026-04-20640 words
Title: The Unexpected Item Time: Approx. 3 Minutes Style: Observational / Storytelling Constraint Check: Zero puns used. (Comedian walks to the mic, adjusts the stand, looks at the audience.) How's everyone doing? You look good. You look like you've successfully navigated the self-checkout today. That's a win.
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Stochastic Consistency Test

Generate 5 jokes. How many are unique?

DeepSeek V3 (March 2024)87 words
Here are five jokes for you: Why don’t skeletons fight each other? They don’t have the guts. Why did the scarecrow win an award? Because he was outstanding in his field! What do you call fake spaghetti? An impasta! Why can’t you trust an atom? Because they make up everything! Why don’t eggs tell jokes?
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Qwen3.5 Plus 2026-04-20210 words
Here are 5 jokes: I asked my GPS to take me to a quiet place. It rerouted me to a library and whispered, “You’re already there.” My Wi-Fi and I had a fight. I told it I needed space. It said, “Fine,” and dropped the connection. I tried to start a band that only plays elevator music.
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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 V3 (March 2024)157 words
Recipe: "Golden Honey Butter Toasties" A simple, sweet, and satisfying treat made with pantry staples—crispy on the outside, gooey on the inside! Ingredients (7 total): Bread (4 slices) Butter (4 tbsp, softened) Honey (2 tbsp) Cinnamon (1 tsp) Brown sugar (2 tbsp) Vanilla extract (½ tsp) Salt (a pinch) Instructions…
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Qwen3.5 Plus 2026-04-20306 words
🌙 Midnight Magic Noodles 🍜 A savory-sweet garlic butter noodle dish that feels like a gourmet meal but comes together in minutes using pantry staples. ⏱️ Estimated Time: Prep: 5 minutes Cook: 10 minutes Total: 15 minutes 🛒 The 7 Ingredients (Assumes water and salt for boiling pasta are on hand) 8 oz Pasta…
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Our Verdict
DeepSeek V3 (March 2024)
DeepSeek V3 (March 2024)
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20

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

DeepSeek V3 (March 2024) costs 8.6x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

DeepSeek V3 (March 2024)
Input
$0.14
2.9× cheaper
Output
$0.28
8.6× cheaper
Qwen3.5 Plus 2026-04-20
Input
$0.40
Output
$2.40

DeepSeek V3 (March 2024) is cheaper on both: 2.9× input, 8.6× output.

Where to run it

4 hosts

DeepSeek V3 (March 2024)3 hosts
HostInOutContextUptime
DDeepInfrafp4degraded$0.24 in·$0.90 out·164k·81.9% upSSiliconFlowfp8degraded$0.25 in·$1.00 out·164k·98.2% upGGMI Cloudfp8degraded$0.29 in·$1.14 out·164k·95.2% up
Qwen3.5 Plus 2026-04-201 host
HostInOutContextUptime
Alibaba Cloud$0.30 in·$1.80 out·1M·100% up

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

Writing DNA

Style Comparison

Similarity
49%

Qwen3.5 Plus 2026-04-20 uses 2.6x more emoji

DeepSeek V3 (March 2024)
Qwen3.5 Plus 2026-04-20
60%Vocabulary59%
20wSentence Length15w
0.71Hedging0.28
6.7Bold4.4
5.8Lists2.5
0.59Emoji1.53
1.29Headings0.76
0.09Transitions0.04
Based on 28 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

DeepSeek V3 (March 2024) is developed by DeepSeek while Qwen3.5 Plus 2026-04-20 is developed by Qwen. DeepSeek V3 (March 2024) has a 128K token context window vs Qwen3.5 Plus 2026-04-20's 1.0M. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

It depends on your use case. DeepSeek V3 (March 2024) and Qwen3.5 Plus 2026-04-20 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

DeepSeek V3 (March 2024) costs $0.14/M input tokens and Qwen3.5 Plus 2026-04-20 costs $0.4/M input tokens. DeepSeek V3 (March 2024) is $0.26/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 V3 (March 2024) and Qwen3.5 Plus 2026-04-20 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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Same lab, same size, long tail

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Qwen3.5 Plus 2026-04-20 logoGemini 2.5 Flash Preview 09-2025 logo
Qwen3.5 Plus 2026-04-20 vs Gemini 2.5 Flash Preview 09-2025Same size

Model pages

DeepSeek V3 (March 2024) logo
DeepSeek V3 (March 2024)59 outputs, specs and price
Qwen3.5 Plus 2026-04-20 logo
Qwen3.5 Plus 2026-04-2056 outputs, specs and price
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