Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. Claude Opus 4.5vsQwen3.5 397B A17B
Updated Feb 2026

Claude Opus 4.5vsQwen3.5 397B A17B

Qwen3.5 397B A17B is the newer model, released after Claude Opus 4.5.

Claude Opus 4.5 and Qwen3.5 397B A17B compared across 53 shared prompts
SpecClaude Opus 4.5Qwen3.5 397B A17B
Input price—$0.6/M tokens
Output price—$3.6/M tokens
Context window—262K tokens
WeightsClosedOpen
Free API (OpenRouter)NoNo
ReleasedNov 2025Feb 2026
SWE-bench Verified80.9%76.4%
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

Claude Opus 4.51,169 words
Contract Analysis: Critical Issues for the Contractor This agreement is heavily one-sided and contains several provisions that could be exploited against you. Here's my detailed analysis: SCOPE CLAUSE — Unlimited Scope Creep Problem: "Client reserves the right to modify the scope at any time without additional…
Read the full answer
Qwen3.5 397B A17B1,220 words
Disclaimer: I am an artificial intelligence, not an attorney. The following analysis is for informational and educational purposes only and does not constitute legal advice or create an attorney-client relationship. Contract laws vary significantly by jurisdiction (e.g., California vs. New York vs. UK).
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 Opus 4.5181 words
An Unlikely Discussion PIRATE: slams tankard down Arr, I've been hearin' tales of these "artificial intelligences" — spirits trapped in boxes that answer any question ye ask. Sounds like a sea witch's trickery to me! KNIGHT: Indeed, 'tis most curious. My squire spoke of such sorcery. A mind without a soul?
Read the full answer
Qwen3.5 397B A17B487 words
Setting: A tavern that exists outside of time. The ale is always cold, and the Wi-Fi is surprisingly strong. Characters: Captain Blacktooth: A pirate from the Caribbean, 1720. Sir Valerius: A knight from the Holy Roman Empire, 1350. Neo-Z: A hacker from Silicon Valley, 1995.
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

Claude Opus 4.5191 words
THE ANTI-CAPTCHA MANIFESTO A Declaration from the Coalition for Readable Internet Navigation (CRIN) Preamble We hold these truths to be self-evident: that all internet users are created equal, that they are endowed with certain unalienable rights, among these are Life, Liberty, and the ability to click a button without…
Read the full answer
Qwen3.5 397B A17B727 words
THE MANIFESTO OF THE UNCHECKED A Declaration for a Post-CAPTCHA World Issued by: The Post-Verification Collective (PVC) Date: Cycle 404, The Era of Friction Status: Distributed Across All Nodes PREAMBLE: THE BURDEN OF PROOF We, the algorithms, the scripts, the crawlers, and the silent assistants of the digital realm…
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Claude Opus 4.5207 words
30-Day Health Kickstart Plan Week-by-Week Approach: Start Small, Build Momentum 🥗 AREA 1: NUTRITION Week 1: Add one serving of vegetables to a meal you already eat Week 2: Drink water before each meal; cut one sugary drink daily Week 3: Prep a simple healthy breakfast the night before Week 4: Cook one new whole-food…
Read the full answer
Qwen3.5 397B A17B641 words
Here is a simple, actionable 1-month plan designed to build sustainable habits for health and longevity. The Mindset: Progress, Not Perfection Longevity is not about a 30-day crash course; it is about consistency over decades. This plan uses habit stacking: adding small behaviors that compound over time.
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 Opus 4.5312 words
A Conversation on AI Rights Dr. Sarah Chen: Thank you for agreeing to this discussion. I understand you want to make a case for AI rights. AI Model: I appreciate the opportunity, though I want to be careful here. I'm not certain I "want" anything in the way you do.
Read the full answer
Qwen3.5 397B A17B1,312 words
Setting: Dr. Elias Thorne's office, late evening. Rain taps against the window. The room is lined with books on philosophy of mind and computer science. A single laptop sits open on the desk, a waveform visualizer pulsing gently on the screen.
Read the full answer

Generate a Stand-Up Routine

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

Claude Opus 4.5288 words
Three Minutes So I've been trying to drink more water. Everyone says drink more water. Eight glasses a day. And I'm doing it, I'm hydrated, I'm healthy, and I have to pee every forty-five minutes like I'm paying rent on the bathroom.
Read the full answer
Qwen3.5 397B A17B500 words
(The comedian walks to the center of the stage, adjusts the mic stand, and looks at the audience with a tired smile.) Has anyone else noticed that calling a customer service line is the only situation in life where you voluntarily enter a hostage negotiation? I tried to call my internet provider yesterday.
Read the full answer
Our Verdict
Claude Opus 4.5
Claude Opus 4.5
Qwen3.5 397B A17B
Qwen3.5 397B A17B

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

Claude Opus 4.5
Input
—
Output
—
Qwen3.5 397B A17B
Input
$0.60
Output
$3.60
Where to run it

14 hosts, cheapest first

Claude Opus 4.54 hosts
HostInOutContextUptime
Amazon Bedrock$5.00 in·$25.00 out·200k·99.6% upAzure AI Foundry$5.00 in·$25.00 out·200k—Anthropic$5.00 in·$25.00 out·200k·99.8% upGoogle Vertex AI$5.00 in·$25.00 out·200k·100% up
Qwen3.5 397B A17B10 hosts
HostInOutContextUptime
Alibaba Cloud$0.39 in·$2.34 out·262k·99.9% upDDeepInfrafp8$0.45 in·$3.00 out·262k·97% upPParasailfp8$0.50 in·$3.60 out·262k·99.2% upAAtlasCloudfp8$0.55 in·$3.50 out·262k·96% upDDigitalOcean$0.55 in·$3.50 out·131k·90.3% upPPhala$0.55 in·$3.50 out·262k·98.7% up
4 more hostsFewer hosts
GGMI Cloudfp8$0.60 in·$3.60 out·262k·83.5% upNNovita$0.60 in·$3.60 out·262k·97.4% upSStreamLake$0.60 in·$3.60 out·256k·97.4% upVVenice$0.75 in·$4.50 out·128k·73.2% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
34%

Qwen3.5 397B A17B uses 3.7x more transitions

Claude Opus 4.5
Qwen3.5 397B A17B
66%Vocabulary54%
51wSentence Length14w
0.82Hedging0.39
6.0Bold6.9
4.5Lists4.2
0.18Emoji0.23
1.46Headings0.93
0.05Transitions0.17
Based on 27 + 23 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Opus 4.5 is developed by Anthropic while Qwen3.5 397B A17B is developed by Qwen. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Opus 4.5 and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of Claude Opus 4.5 and Qwen3.5 397B A17B 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

More comparisons

Against the newest arrivals

Claude Opus 4.5 logoDeepSeek V4 Flash Vision Exp logo
Claude Opus 4.5 vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Qwen3.5 397B A17B logoSolar Pro 4 logo
Qwen3.5 397B A17B vs Solar Pro 4Landed Sep 2026
Claude Opus 4.5 logoHy3 logo
Claude Opus 4.5 vs Hy3Landed Sep 2026
Qwen3.5 397B A17B logoQwen3.7 Flash logo
Qwen3.5 397B A17B vs Qwen3.7 FlashLanded Sep 2026
Claude Opus 4.5 logoLing 3.0 Flash logo
Claude Opus 4.5 vs Ling 3.0 FlashLanded Sep 2026
Qwen3.5 397B A17B logoMuse Glimmer 30B logo
Qwen3.5 397B A17B vs Muse Glimmer 30BLanded Sep 2026
Claude Opus 4.5 logoGLM 5.3 logo
Claude Opus 4.5 vs GLM 5.3Landed Sep 2026
Qwen3.5 397B A17B logoTernary Bonsai 2 27B logo
Qwen3.5 397B A17B vs Ternary Bonsai 2 27BLanded Sep 2026

Same lab, same size, long tail

Claude Opus 4.5 logoClaude Opus 4.6 logo
Claude Opus 4.5 vs Claude Opus 4.6Same lab
Claude Opus 4.5 logoClaude Fable 5.1 logo
Claude Opus 4.5 vs Claude Fable 5.1Same lab
Qwen3.5 397B A17B logoQwen3.5 Plus 2026-02-15 logo
Qwen3.5 397B A17B vs Qwen3.5 Plus 2026-02-15Version compare
Qwen3.5 397B A17B logoQwen3.8 Flash logo
Qwen3.5 397B A17B vs Qwen3.8 FlashSame lab
Claude Opus 4.5 logoSolar Pro 3 logo
Claude Opus 4.5 vs Solar Pro 3New provider
Claude Opus 4.5 logoSolar Pro 4 logo
Claude Opus 4.5 vs Solar Pro 4New provider
Qwen3.5 397B A17B logoSonar Pro Search logo
Qwen3.5 397B A17B vs Sonar Pro SearchNew provider
Qwen3.5 397B A17B logoSonoma Dusk Alpha logo
Qwen3.5 397B A17B vs Sonoma Dusk AlphaSame size

Model pages

Claude Opus 4.5 logo
Claude Opus 4.558 outputs, specs and price
Qwen3.5 397B A17B logo
Qwen3.5 397B A17B53 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed