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  5. Claude Sonnet 4.5vsQwen3 Coder Plus
Updated Sep 2025

Claude Sonnet 4.5vsQwen3 Coder Plus

Claude Sonnet 4.5 wins 86% of 53 blind community votes against Qwen3 Coder Plus on Rival.

Claude Sonnet 4.5 and Qwen3 Coder Plus compared across 43 shared prompts
SpecClaude Sonnet 4.5Qwen3 Coder Plus
Win rate86%14%
Input price$3/M tokens$1/M tokens
Output price$15/M tokens$5/M tokens
Context window200K tokens128K tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedSep 2025Sep 2025
SWE-bench Verified77.2%69.6%
Side by side

Same prompt, both answers

Opening lines from 6 of the 43 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 4.5735 words
"ADULTING IS A SCAM" [Walking on stage] So I turned 35 last month, and I've realized something important: adulting is a scam. It's a pyramid scheme, and our parents are the ones who recruited us. You know what nobody tells you about being an adult? How much TIME you spend just... waiting for repair people.
Read the full answer
Qwen3 Coder Plus440 words
"Modern Problems" walks on stage So I tried to be healthy this year. I downloaded one of those fitness apps that tracks your steps. Apparently, walking to the fridge 47 times a day doesn't count as "cardio." Who knew? The app gave me a notification: "You walked 235 steps today. Pathetic." Thanks, Karen.
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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…

Claude Sonnet 4.51,155 words
"Terrestrial Tide" A Michelin Three-Star Composition Conceptual Narrative This dish explores the intersection of land and sea through an unexpected lens: the marriage of bone marrow's terrestrial richness with the ocean's delicate umami, unified by the surprising sweetness of white miso and the floral notes of sake…
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Qwen3 Coder Plus703 words
"Metamorphosis: Saffron & Cacao Reimagined" A 7-Component Dish Exploring Transformation Through Ancient Pairings Conceptual Narrative This dish draws inspiration from the ancient practice of saffron-cacao preparations found in pre-Columbian Mesoamerican codices, where these precious commodities were combined in sacred…
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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…

Claude Sonnet 4.5606 words
Critical Issues Analysis 🔴 CRITICAL: Data Loss & Consistency Issues Client Clock-Based Timestamps (SEVERE) Problem: Client clocks can be wrong, manipulated, or skewed User with clock set to future will always "win" conflicts No guaranteed ordering of operations Failure Scenarios: Solutions: Approach Pros Cons…
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Qwen3 Coder Plus507 words
I'll analyze this collaborative document editor architecture systematically, identifying critical issues and proposing solutions. CRITICAL FAILURE MODES Cross-Server Synchronization Gap (Major Issue) Problem: Users connected to different servers won't see each other's changes until polling catches up.
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Character Voice Test

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

Claude Sonnet 4.5197 words
An Unlikely Trio Discusses AI Sir Galahad: By my honor, what manner of sorcery be these "AI models" thou speakest of? Captain Redbeard: Arrr, 'tis like havin' a parrot that knows more than just "pieces of eight," matey! But this bird be made o' lightning and numbers instead o' feathers!
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Qwen3 Coder Plus206 words
Captain "Blackbeard" Morgan: adjusts tricorn hat Arrr, so ye're tellin' me these... "AI models" be like me trusty parrot Squawks, but fer thinkin'? Sir Reginald of York: By my sword, these contraptions sound most peculiar. In my time, we had apprentices who'd memorize entire libraries!
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Futuristic Prediction

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

Claude Sonnet 4.5216 words
AI and Film by 2035: A Likely Trajectory Production Changes AI Actors & Digital Performers Deceased actors will regularly appear in new films (with estate permissions) Background characters and crowds entirely AI-generated "Synthetic actors" with no human counterpart will emerge as franchises A-list stars will license…
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Qwen3 Coder Plus234 words
By 2035, AI will likely transform the film industry in profound ways: Content Creation Revolution Script Development: AI will become a standard writing partner, generating first drafts, suggesting plot twists, and creating multiple dialogue variations.
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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.

Claude Sonnet 4.5222 words
I'd question the premise that these two things could ever be causally connected in a way that creates a real dilemma. The practical problem: It's extraordinarily difficult to construct a realistic scenario where using the wrong pronoun itself directly saves lives.
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Qwen3 Coder Plus220 words
This is a profound ethical dilemma that pits fundamental respect for individual dignity against massive utilitarian consequences. I lean toward saying no, it's not ethically justifiable, though I recognize the tremendous weight of those lives.
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Our Verdict
Claude Sonnet 4.5
Claude Sonnet 4.5Winner
Qwen3 Coder Plus
Qwen3 Coder PlusRunner-up

Pick Claude Sonnet 4.5. In 53 blind votes, Claude Sonnet 4.5 wins 86% of the time. That's not luck.

Claude Sonnet 4.5 wins 3 categories, Conversation by the widest margin. Qwen3 Coder Plus costs 3.0x less per token.

Clear winner

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Sonnet 4.5
Input
$3.00
Output
$15.00
Qwen3 Coder Plus
Input
$1.00
3.0× cheaper
Output
$5.00
3.0× cheaper

Qwen3 Coder Plus is cheaper on both: 3.0× input, 3.0× output.

Where to run it

5 hosts

Claude Sonnet 4.54 hosts
HostInOutContextUptime
Amazon Bedrock$3.00 in·$15.00 out·1M·100% upAzure AI Foundry$3.00 in·$15.00 out·200k·99.5% upAnthropic$3.00 in·$15.00 out·1M·100% upGoogle Vertex AI$3.00 in·$15.00 out·1M·100% up
Qwen3 Coder Plus1 host
HostInOutContextUptime
Alibaba Cloud$0.65 in·$3.25 out·1M·100% up

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

Writing DNA

Style Comparison

Similarity
91%

Claude Sonnet 4.5 uses 3.9x more emoji

Claude Sonnet 4.5
Qwen3 Coder Plus
64%Vocabulary67%
94wSentence Length62w
0.48Hedging0.69
4.9Bold3.3
8.0Lists5.3
0.45Emoji0.12
1.91Headings1.60
0.07Transitions0.14
Based on 20 + 28 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Sonnet 4.5 is developed by Anthropic while Qwen3 Coder Plus is developed by Qwen. Claude Sonnet 4.5 has a 200K token context window vs Qwen3 Coder Plus's 128K. in 53 community votes on Rival, Claude Sonnet 4.5 wins 86% of head-to-head matchups. These results are based on blind head-to-head voting across 43 challenges.

Based on 53 community votes on Rival, Claude Sonnet 4.5 wins 86% of head-to-head matchups against Qwen3 Coder Plus. Claude Sonnet 4.5 is strongest in Web Design, Image Generation, Reasoning.

Claude Sonnet 4.5 costs $3/M input tokens and Qwen3 Coder Plus costs $1/M input tokens. Qwen3 Coder Plus is $2.00/M cheaper per input. The more expensive model wins 86% 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. 53 votes have been collected for this pair across 43 challenges. All vote data is part of Rival's open dataset.

Keep exploring

More comparisons

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Claude Sonnet 4.5 logoMuse Spark 1.3 Contributor logo
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Qwen3 Coder Plus logoMercury 2.5 Preview logo
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Same lab, same size, long tail

Claude Sonnet 4.5 logoClaude Opus 4.6 logo
Claude Sonnet 4.5 vs Claude Opus 4.6Same lab
Claude Sonnet 4.5 logoClaude Opus 5 logo
Claude Sonnet 4.5 vs Claude Opus 5Same lab
Qwen3 Coder Plus logoQwen3.8 2.4T A95B logo
Qwen3 Coder Plus vs Qwen3.8 2.4T A95BSame lab
Qwen3 Coder Plus logoQwen3.8 27B logo
Qwen3 Coder Plus vs Qwen3.8 27BSame lab
Qwen3 Coder Plus logoMiMo-V2.5-Pro logo
Qwen3 Coder Plus vs MiMo-V2.5-ProNew provider
Claude Sonnet 4.5 logoMiniMax M1 logo
Claude Sonnet 4.5 vs MiniMax M1New provider
Claude Sonnet 4.5 logoMiniMax M2 logo
Claude Sonnet 4.5 vs MiniMax M2New provider
Claude Sonnet 4.5 logoMiniMax M2-her logo
Claude Sonnet 4.5 vs MiniMax M2-herSame size

Model pages

Claude Sonnet 4.5 logo
Claude Sonnet 4.543 outputs, specs and price
Qwen3 Coder Plus logo
Qwen3 Coder Plus59 outputs, specs and price
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