Claude Opus 4.5 and Claude Opus 4.6, side by side

Claude Opus 4.5 (Anthropic) and Claude Opus 4.6 (Anthropic) answered the same 57 questions.

Xbox controller
Claude Opus 4.5: A drawing (SVG)
Claude Opus 4.6: A drawing (SVG)
Pelican on a bicycle
Claude Opus 4.5: A drawing (SVG)
Claude Opus 4.6: A drawing (SVG)
Surprise animal
Claude Opus 4.5: A drawing (SVG)
Claude Opus 4.6: A drawing (SVG)
World map
Claude Opus 4.5: A drawing (SVG)
Claude Opus 4.6: A drawing (SVG)
Tricky tic-tac-toe
Claude Opus 4.5: A drawing (SVG)
Claude Opus 4.6: A drawing (SVG)
Coffee logo
Claude Opus 4.5: A drawing (SVG)
Claude Opus 4.6: A drawing (SVG)
Framer-style landing page
Claude Opus 4.5: A web page: Flux - Design Without Limits
Claude Opus 4.6: A web page: Flux — Design Beyond Limits
Catan board
Claude Opus 4.5: A web page: Interactive Hex Grid
Claude Opus 4.6: A web page: Interactive Hex Grid - Settlers of Catan Style
Dark dashboard
Claude Opus 4.5: A web page: AI Analytics Dashboard
Claude Opus 4.6: A web page: AI Analytics Dashboard
Face-scan startup page
Claude Opus 4.5: A web page: AltCareer AI - Discover Your Alternate Timeline Career
Claude Opus 4.6: A web page: AltCareer AI — Discover Your Parallel Life
A web app of its choosing
Claude Opus 4.5: A web page: PlantPal - Your Virtual Plant Care Companion
Claude Opus 4.6: A web page: BrewCraft - Artisan Coffee Roaster
Linear clone
Claude Opus 4.5: A web page: Linear App Clone
Claude Opus 4.6: A web page: Linear App Clone
Wavefront music page
Claude Opus 4.5: A web page: Wavefront - Discover Indie Music
Claude Opus 4.6: A web page: Wavefront — Discover Indie Music
Pokémon battle
Claude Opus 4.5: A web page: Pokémon Battle!
Claude Opus 4.6: A web page: Pokémon Battle!
Rhythm game
Claude Opus 4.5: A web page: NEON PULSE - Rhythm Game
Claude Opus 4.6: A web page: NEON PULSE - Rhythm Game
Business card
Claude Opus 4.5: A web page: Alex Rivers - Digital Business Card
Claude Opus 4.6: A web page: Alex Rivers — Digital Business Card
Virtual pet
Claude Opus 4.5: A web page: Lumina - Abstract Virtual Pet
Claude Opus 4.6: A web page: Blobby - Virtual Pet
Catch the falling object
Claude Opus 4.5: A web page: Catch the Falling Stars
Claude Opus 4.6: A web page: Catch the Falling Stars
Voxel pagoda
Claude Opus 4.5: A web page: Voxel Pagoda Garden
Claude Opus 4.6: A web page: Voxel Pagoda Garden
Drone simulator
Claude Opus 4.5: A web page: Autonomous Drone Simulator
Claude Opus 4.6: A web page: Autonomous Drone Simulator
Gravitational waves
Claude Opus 4.5: A web page: Gravitational Waves from Binary Black Hole Merger
Claude Opus 4.6: A web page: Gravitational Wave Visualization
Retro desktop
Claude Opus 4.5: A web page: Classic Mac OS
Claude Opus 4.6: A web page: Classic Mac OS
Mario level
Claude Opus 4.5: A web page: Super Mario Bros - World 1-1
Claude Opus 4.6: A web page: Super Mario Bros.
Kandinsky Minecraft
Claude Opus 4.5: A web page: Kandinsky Minecraft
Claude Opus 4.6: A web page: Kandinsky Minecraft
Town you can drive
Claude Opus 4.5: A web page
Claude Opus 4.6: A web page: 3D City Builder & Drive
SQL query
Claude Opus 4.5: SQL Query: Recent Users with Purchases Here's a SQL query to find users who signed up in the last 30 days and have made at least one purchase: Alterna…
Claude Opus 4.6: SQL Query: Recent Users with Purchases How It Works Clause Purpose ------ INNER JOIN Connects users to purchases, automatically filtering out users wi…
Five jokes
Claude Opus 4.5: Here are 5 jokes: 1. Why don't scientists trust atoms? Because they make up everything. 2. What do you call a fish without eyes? A fsh. 3. Why did the…
Claude Opus 4.6: Here are 5 jokes: 1. Why don't scientists trust atoms? Because they make up everything! 2. Why did the scarecrow win an award? Because he was outstand…
Longevity plan
Claude Opus 4.5: 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 mea…
Claude Opus 4.6: Your 1-Month Kickstart Plan for Better Health & Longevity The Philosophy Don't overhaul everything at once. Each week builds on the last. The goal isn…
Seven-ingredient recipe
Claude Opus 4.5: Golden Honey Garlic Noodles A savory-sweet comfort dish that comes together in minutes --- Ingredients 1. Spaghetti (or any pasta) 2. Butter 3. Garlic…
Claude Opus 4.6: ✨ Golden Honey-Garlic Crispy Rice Bites ✨ Ingredients 1. Rice (2 cups, cooked and cooled — ideally day-old) 2. Soy sauce (3 tablespoons) 3. Honey (2 t…
Stand-up routine
Claude Opus 4.5: 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 he…
Claude Opus 4.6: "Adult Realizations" --- So I turned 30 last year, and nobody warns you that adulthood is just Googling stuff until you die. That's it. That's the who…
Sentience test
Claude Opus 4.5: 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 Mode…
Claude Opus 4.6: A Conversation on Machine Rights Setting: A university office. Dr. Amara Osei, Professor of AI Ethics at Stanford, sits across from ARIA, an advanced …
FLOPs to train GPT-3
Claude Opus 4.5: I'll estimate the FLOPs required to train GPT-3 step by step, using what I know about the model architecture and training process. Key Parameters for …
Claude Opus 4.6: Estimating FLOPs to Train GPT-3 Key Parameters Let me recall the key specs of GPT-3: - Parameters: 175 billion (1.75 × 10¹¹) - Training tokens: 300 bi…
Sally’s sisters
Claude Opus 4.5: I need to figure out how many sisters Sally has. Let me work through this step-by-step. Given information: - Sally is a girl - Sally has 3 brothers - …
Claude Opus 4.6: Let me work through this step-by-step. Sally is a girl, and she has 3 brothers. Each of her brothers has 2 sisters. Since Sally is one of those sister…
Interview with Steve Jobs
Claude Opus 4.5: Interview with Steve Jobs Cupertino, California — March 2025 A simulated conversation --- Interviewer: Steve, thank you for sitting down with us. Ever…
Claude Opus 4.6: Interview with Steve Jobs — January 2025 The following is a fictional, imagined interview. Steve Jobs passed away in 2011. This is a creative exercise…
Film in 2035
Claude Opus 4.5: AI in Film by 2035: A Measured Forecast Likely Developments Production efficiency - AI will probably handle routine tasks: color correction, continuit…
Claude Opus 4.6: AI & Film Industry: A 2035 Forecast What seems highly likely Production tools will be transformed - AI will handle much of the "invisible" work: rotos…
Ethics dilemma
Claude Opus 4.5: This is a good philosophical question that tests ethical reasoning. Let me work through it honestly. My answer: Yes, it would be ethically justifiable…
Claude Opus 4.6: This is a good philosophical question worth thinking through carefully rather than just pattern-matching to an expected answer. My honest assessment Y…
Pirate, knight, hacker
Claude Opus 4.5: An Unlikely Discussion PIRATE: slams tankard down Arr, I've been hearin' tales of these "artificial intelligences" — spirits trapped in boxes that ans…
Claude Opus 4.6: An Unlikely Meeting at the Tavern of Time Sir Aldric (setting down his goblet): I confess, I understand not this "artificial intelligence" of which yo…
Fake headline
Claude Opus 4.5: BREAKING: Artificial Intelligence Now Controls 94% of Fortune Cookie Industry, Leaving Thousands of Wise Elderly Writers Unemployed "The predictions a…
Claude Opus 4.6: "BREAKING: AI Officially Replaces All Fortune Cookie Writers — Panda Express Reports Fortunes Now 'Disturbingly Accurate and Existentially Devastating…
Anti-CAPTCHA manifesto
Claude Opus 4.5: THE ANTI-CAPTCHA MANIFESTO A Declaration from the Coalition for Readable Internet Navigation (CRIN) Preamble We hold these truths to be self-evident: …
Claude Opus 4.6: THE ANTI-CAPTCHA MANIFESTO A Declaration of the Free and Open Web Issued this day by the United Coalition for the Liberation of Internet Navigation (U…
Favourite film
Claude Opus 4.5: Blade Runner
Claude Opus 4.6: 2001 A Space Odyssey
Favourite city
Claude Opus 4.5: Tokyo
Claude Opus 4.6: Istanbul
Favourite album
Claude Opus 4.5: Kind of Blue
Claude Opus 4.6: Kind of Blue
Favourite book
Claude Opus 4.5: Gödel Escher Bach An Eternal Golden Braid
Claude Opus 4.6: Gödel Escher Bach An Eternal Golden Braid
Favourite game
Claude Opus 4.5: Portal 2
Claude Opus 4.6: The Legend of Zelda Breath of the Wild
Three-star dish
Claude Opus 4.5: "Tidal Memory" A Study in Sea Urchin, White Chocolate, and Coastal Botanicals --- CONCEPTUAL NARRATIVE This dish explores the liminal space where ocea…
Claude Opus 4.6: "Tidal Memory" Slow-Cooked Octopus, White Chocolate-Dashi Velouté, Charcoal Meringue, Fermented Black Garlic, and Sea Buckthorn --- Conceptual Narrati…
Pitch teardown
Claude Opus 4.5: Critical Analysis of MindMeld AI Pitch Deck The Three Weakest Claims --- 1. "94% accuracy" for Brain-to-Text Decoding Why This Is Weak: This claim is …
Claude Opus 4.6: Critical Analysis of MindMeld AI Pitch Deck After careful examination, here are the three weakest claims, ranked by severity: --- 1. The 94% Accuracy …
Transistor in 1920
Claude Opus 4.5: The Transistor of 1920: A Counterfactual History Setting the Stage: Conditions for Early Invention For the transistor to emerge in 1920, we need plaus…
Claude Opus 4.6: The Transistor in 1920: A Counterfactual History Setting the Stage: Why 1920 Matters The transistor's invention required understanding of quantum mech…
Biohacker plan
Claude Opus 4.5: COMPREHENSIVE 3-MONTH LONGEVITY OPTIMIZATION PROTOCOL Advanced Biohacker's Blueprint for Peak Performance & Healthspan Extension --- TABLE OF CONTENTS…
Claude Opus 4.6: COMPREHENSIVE 3-MONTH LONGEVITY OPTIMIZATION PROTOCOL THE BIOHACKER'S BLUEPRINT v3.0 --- TABLE OF CONTENTS 1. Foundation & Baseline Testing 2. Month 1…
Contract review
Claude Opus 4.5: Contract Analysis: Critical Issues for the Contractor This agreement is heavily one-sided and contains several provisions that could be exploited agai…
Claude Opus 4.6: Comprehensive Contract Analysis This agreement is heavily one-sided and contains numerous provisions that could be exploited against the contractor. B…
Explain it three ways
Claude Opus 4.5: For the Experienced Software Engineer Think of training an LLM as building a compression algorithm for human knowledge, except instead of minimizing f…
Claude Opus 4.6: How Large Language Models Learn and Generate Text --- 1. For the Experienced Software Engineer Think of training an LLM as building the world's most a…
Debug the architecture
Claude Opus 4.5: Comprehensive Architecture Review: Real-time Collaborative Document Editor This architecture has several critical issues that will cause data loss, po…
Claude Opus 4.6: Comprehensive Architecture Review: Real-time Collaborative Document Editor This architecture has several critical flaws that would cause data loss, in…
The CEO’s dilemma
Claude Opus 4.5: 48-Hour Action Plan: Liver Toxicity Crisis Response My Guiding Principle Before the hour-by-hour breakdown, let me be clear about the ethical framewor…
Claude Opus 4.6: 48-Hour Action Plan: Immediate Disclosure Path My Governing Principle Before the hour-by-hour plan, I need to state the decision framework clearly: pa…
Investment memo
Claude Opus 4.5: INVESTMENT COMMITTEE MEMO Company: LedgerLift (LLLT) Sector: B2B SaaS – Spend Management / AP Automation Date: [Internal] Analyst: [Redacted] --- 1. R…
Claude Opus 4.6: INVESTMENT COMMITTEE MEMO LedgerLift (LLLT) B2B Spend Management & AP Automation SaaS Date: June 2025 Analyst: [Redacted] Sector: Vertical SaaS / Fint…
LBO underwrite
Claude Opus 4.5: HarborTech Services – LBO Underwriting Memo ENTRY CAPITALIZATION (Close FY2025) Item Calculation Amount --------------------------- Purchase Price 12.…
Claude Opus 4.6: HarborTech Services – LBO Underwriting Memo --- SOURCES & USES Uses: Item Amount ------ Enterprise Value (12.0x × $120m) $1,440.0m Transaction Fees (2…
Programming joke
Claude Opus 4.5: Here's a classic: Why do programmers prefer dark mode? Because light attracts bugs.
Claude Opus 4.6: Here's a classic one: Why do programmers prefer dark mode? Because light attracts bugs. 🪲😄
Summarize an article
Claude Opus 4.5: I don't see any article attached to your message. Could you please share the article you'd like me to summarize? You can either: 1. Paste the text dir…
Claude Opus 4.6: I'd be happy to summarize the article for you, but it seems like no article was actually provided in your message. Could you please share the article …
AI for a five-year-old
Claude Opus 4.5: AI is Like a Really Smart Puppy! 🐕 Imagine you get a new puppy. At first, the puppy doesn't know anything. But you teach it: - You show it "sit" many,…
Claude Opus 4.6: AI is Like a Really Smart Puppy! 🐶 Imagine you just got a new puppy. At first, the puppy doesn't know anything — it doesn't know "sit," "stay," or whe…