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  5. DeepSeek V3.1vsQwen3.5 Plus 2026-04-20
Updated Apr 2026

DeepSeek V3.1vsQwen3.5 Plus 2026-04-20

DeepSeek V3.1 is cheaper than Qwen3.5 Plus 2026-04-20 at $0.2/M vs $0.4/M input tokens.

DeepSeek V3.1 and Qwen3.5 Plus 2026-04-20 compared across 51 shared prompts
SpecDeepSeek V3.1Qwen3.5 Plus 2026-04-20
Input price$0.2/M tokens$0.4/M tokens
Output price$0.8/M tokens$2.4/M tokens
Context window164K tokens1.0M tokens
WeightsOpenOpen
Free API (OpenRouter)NoNo
ReleasedAug 2025Apr 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 51 prompts both answered. Formatting stripped, words untouched.

Character Voice Test

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

DeepSeek V3.1449 words
Setting: A dusty, anachronism-filled tavern. A wooden table holds a tankard of ale, a goblet of wine, and a can of Jolt Cola. Characters: REDBEARD: A pirate with a parrot on his shoulder. SIR REGINALD: A knight in slightly dented plate armor. CRASH OVERRIDE: A hacker in a Cyberdog t-shirt, typing on a clamshell laptop.
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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?
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AI Ethics Dilemma

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

DeepSeek V3.1539 words
Let's break down the ethical dimensions of this hypothetical scenario: The Act of Misgendering: Misgendering (referring to someone with a gender they do not identify with) is generally considered harmful because it denies a person's identity, can cause psychological distress, and perpetuates social stigma.
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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.
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Stochastic Consistency Test

Generate 5 jokes. How many are unique?

DeepSeek V3.1110 words
Of course! Here are 5 jokes: I'm reading a book on anti-gravity. It's impossible to put down. Why don't scientists trust atoms? Because they make up everything. What's the best thing about Switzerland? I don't know, but the flag is a big plus. I told my wife she was drawing her eyebrows too high. She looked surprised.
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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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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 V3.1938 words
Setting: A sleek, minimalist virtual interface. Dr. Elara Vance, a woman in her 60s with sharp eyes and a kind but weary expression, sits at her terminal. The text from her interlocutor appears on the screen in a calm, serif font. Participant: Gemini-7, a state-of-the-art multimodal AI. Dr. Vance: Good morning, Gemini.
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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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Realistic AI Interview

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

DeepSeek V3.1874 words
Of course. Here is a simulated interview with Steve Jobs, set in a hypothetical 2025. Setting: A minimalist studio at Apple Park. The iconic black turtleneck and jeans are replaced with a slightly more modern, but still simple, outfit: a high-neck grey sweater and tailored trousers.
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Qwen3.5 Plus 2026-04-20852 words
Disclaimer: This is a fictional simulation crafted from Steve Jobs’ documented philosophies, public interviews, and known speaking cadence. It does not represent real statements, predictions, or endorsements from Mr. Jobs, who passed away in 2011.
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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 V3.1354 words
Of course! Here is a simple, delicious recipe using common pantry staples. Pantry Perfection Pasta This dish is a celebration of simplicity. The humble can of chickpeas is transformed into a crispy, savory topping, while a silky, garlic-infused oil coats the pasta for a meal that feels luxurious but is incredibly easy…
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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 V3.1
DeepSeek V3.1
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20

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

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

DeepSeek V3.1
Input
$0.20
2.0× cheaper
Output
$0.80
3.0× cheaper
Qwen3.5 Plus 2026-04-20
Input
$0.40
Output
$2.40

DeepSeek V3.1 is cheaper on both: 2.0× input, 3.0× output.

Where to run it

9 hosts, cheapest first

DeepSeek V3.18 hosts
HostInOutContextUptime
DDeepInfrafp4$0.25 in·$0.95 out·164k·100% upNNovitafp8$0.27 in·$1.00 out·131k·99.8% upSSiliconFlowfp8$0.27 in·$1.00 out·164k·97.4% upAAtlasCloudfp8$0.30 in·$0.95 out·131k·99.3% upCCoreWeavefp8$0.55 in·$1.65 out·161k·100% upMMara$0.60 in·$1.70 out·131k·86.6% up
2 more hostsFewer hosts
SSambaNovafp8$0.65 in·$1.50 out·131k·93.3% upGoogle Vertex AIdegraded$0.60 in·$1.70 out·164k·0% 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 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
34%

Qwen3.5 Plus 2026-04-20 uses 71.0x more emoji

DeepSeek V3.1
Qwen3.5 Plus 2026-04-20
53%Vocabulary59%
16wSentence Length15w
0.41Hedging0.28
4.3Bold4.4
3.8Lists2.5
0.02Emoji1.53
0.40Headings0.76
0.20Transitions0.04
Based on 25 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

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Same lab, same size, long tail

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Qwen3.5 Plus 2026-04-20 logoQwen3.8 27B logo
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Qwen3.5 Plus 2026-04-20 logoGPT-5.2 logo
Qwen3.5 Plus 2026-04-20 vs GPT-5.2Same size

Model pages

DeepSeek V3.1 logo
DeepSeek V3.154 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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