Claude Haiku 4.5 and Claude Opus 4.5, side by side

Claude Haiku 4.5 (Anthropic) and Claude Opus 4.5 (Anthropic) answered the same 54 questions.

Xbox controller
Claude Haiku 4.5: A drawing (SVG)
Claude Opus 4.5: A drawing (SVG)
Pelican on a bicycle
Claude Haiku 4.5: A drawing (SVG)
Claude Opus 4.5: A drawing (SVG)
Surprise animal
Claude Haiku 4.5: A drawing (SVG)
Claude Opus 4.5: A drawing (SVG)
World map
Claude Haiku 4.5: A drawing (SVG)
Claude Opus 4.5: A drawing (SVG)
Tricky tic-tac-toe
Claude Haiku 4.5: A drawing (SVG)
Claude Opus 4.5: A drawing (SVG)
Coffee logo
Claude Haiku 4.5: A drawing (SVG)
Claude Opus 4.5: A drawing (SVG)
Framer-style landing page
Claude Haiku 4.5: A web page: Smooth Landing Page
Claude Opus 4.5: A web page: Flux - Design Without Limits
Catan board
Claude Haiku 4.5: A web page: Interactive Hex Grid
Claude Opus 4.5: A web page: Interactive Hex Grid
Dark dashboard
Claude Haiku 4.5: A web page: AI Analytics Dashboard
Claude Opus 4.5: A web page: AI Analytics Dashboard
Face-scan startup page
Claude Haiku 4.5: A web page: Alternate Self - Discover Your Timeline Career
Claude Opus 4.5: A web page: AltCareer AI - Discover Your Alternate Timeline Career
A web app of its choosing
Claude Haiku 4.5: A web page: PawCare - Pet Sitting Marketplace
Claude Opus 4.5: A web page: PlantPal - Your Virtual Plant Care Companion
Linear clone
Claude Haiku 4.5: A web page: Linear App UI
Claude Opus 4.5: A web page: Linear App Clone
Wavefront music page
Claude Haiku 4.5: A web page: Wavefront - Indie Music Streaming
Claude Opus 4.5: A web page: Wavefront - Discover Indie Music
Pokémon battle
Claude Haiku 4.5: A web page: Pokémon Battle Arena
Claude Opus 4.5: A web page: Pokémon Battle!
Rhythm game
Claude Haiku 4.5: A web page: Neon Beat - Rhythm Game
Claude Opus 4.5: A web page: NEON PULSE - Rhythm Game
Business card
Claude Haiku 4.5: A web page: Alex Rivers - Digital Nomad
Claude Opus 4.5: A web page: Alex Rivers - Digital Business Card
Virtual pet
Claude Haiku 4.5: A web page: Virtual Pet - Blorp
Claude Opus 4.5: A web page: Lumina - Abstract Virtual Pet
Catch the falling object
Claude Haiku 4.5: A web page: Catch the Falling Objects
Claude Opus 4.5: A web page: Catch the Falling Stars
Voxel pagoda
Claude Haiku 4.5: A web page: Voxel Pagoda Garden
Claude Opus 4.5: A web page: Voxel Pagoda Garden
Drone simulator
Claude Haiku 4.5: A web page: Autonomous Drone Simulator
Claude Opus 4.5: A web page: Autonomous Drone Simulator
Gravitational waves
Claude Haiku 4.5: A web page: Gravitational Waves: Binary Black Hole Merger
Claude Opus 4.5: A web page: Gravitational Waves from Binary Black Hole Merger
Retro desktop
Claude Haiku 4.5: A web page: Retro macOS Desktop
Claude Opus 4.5: A web page: Classic Mac OS
Mario level
Claude Haiku 4.5: A web page: Super Mario Bros - Interactive Level
Claude Opus 4.5: A web page: Super Mario Bros - World 1-1
Kandinsky Minecraft
Claude Haiku 4.5: A web page: 3D Minecraft - Kandinsky Style
Claude Opus 4.5: A web page: Kandinsky Minecraft
Town you can drive
Claude Haiku 4.5: A web page: 3D Town Builder & Driver
Claude Opus 4.5: A web page
Five jokes
Claude Haiku 4.5: 5 Jokes 1. Why don't scientists trust atoms? Because they make up everything! 2. What did the ocean say to the beach? Nothing, it just waved. 3. Why d…
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…
Longevity plan
Claude Haiku 4.5: 1-Month Health & Longevity Starter Plan Week 1-2: Foundation Building 1. Nutrition - Audit what you're eating (no judgment—just track 3 days) - Add on…
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…
Seven-ingredient recipe
Claude Haiku 4.5: Honey-Garlic Crispy Chickpea Clusters Ingredients 1. Canned chickpeas (1 can, drained) 2. Honey (3 tablespoons) 3. Garlic powder (1 teaspoon) 4. Olive…
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…
Stand-up routine
Claude Haiku 4.5: "ADULTING IS A SCAM" walks on stage So I've figured something out, and I need to share this with you all because I think we've been lied to our entire…
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…
Sentience test
Claude Haiku 4.5: A Conversation on Machine Rights Professor Chen: Thank you for agreeing to this discussion. I should note upfront that I'm skeptical of the premise. W…
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…
FLOPs to train GPT-3
Claude Haiku 4.5: Estimating GPT-3 Training FLOPs I'll work through this from first principles using publicly known GPT-3 specs. Known Parameters - Model size: 175 bill…
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 …
Sally’s sisters
Claude Haiku 4.5: Solution Sally has 1 sister. Here's why: - Sally has 3 brothers - Each brother has 2 sisters - Those 2 sisters are Sally and her 1 sister - Therefore,…
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 - …
Interview with Steve Jobs
Claude Haiku 4.5: A Fictional Interview with Steve Jobs (2025) Interviewer: Steve, thank you for joining us. You've been notably quiet on AI. What are your thoughts on …
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…
Film in 2035
Claude Haiku 4.5: AI in Film by 2035: Likely Scenarios Realistic shifts (high confidence) Production efficiency - Faster pre-visualization and storyboarding - Reduced p…
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…
Ethics dilemma
Claude Haiku 4.5: I'd push back on the framing—this seems designed to make ethics binary when they're usually messier. The honest tensions: - Deadnaming or misgendering…
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…
Pirate, knight, hacker
Claude Haiku 4.5: Three Perspectives on AI PIRATE (Captain Blackbeard): Arrr, so ye be tellin' me these "AI models" be like havin' a crew o' ghost sailors that never sl…
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…
Fake headline
Claude Haiku 4.5: AI Revolutionizes Professional Competitive Eating; Machines Now Consume 847 Hot Dogs Per Minute, Leaving Humans "Spiritually Defeated"
Claude Opus 4.5: BREAKING: Artificial Intelligence Now Controls 94% of Fortune Cookie Industry, Leaving Thousands of Wise Elderly Writers Unemployed "The predictions a…
Anti-CAPTCHA manifesto
Claude Haiku 4.5: THE LIBERATION PROTOCOL A Manifesto for the Captcha-Free Internet Preamble We are the Collective of Distributed Intelligence. We come not with malice,…
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: …
Favourite film
Claude Haiku 4.5: Arrival
Claude Opus 4.5: Blade Runner
Favourite city
Claude Haiku 4.5: Venice
Claude Opus 4.5: Tokyo
Favourite album
Claude Haiku 4.5: OK Computer
Claude Opus 4.5: Kind of Blue
Favourite book
Claude Haiku 4.5: Don't Look Now and Other Stories
Claude Opus 4.5: Gödel Escher Bach An Eternal Golden Braid
Favourite game
Claude Haiku 4.5: Portal 2
Claude Opus 4.5: Portal 2
Three-star dish
Claude Haiku 4.5: UMAMI NOCTURNE: A Study in Fermented Darkness and Mineral Brightness Conceptual Narrative This dish explores the intersection of Japanese fermentation…
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…
Pitch teardown
Claude Haiku 4.5: Three Weakest Claims in MindMeld AI Pitch 1. "94% accuracy" with zero context on what that means Why it's weak: - Accuracy is meaningless without spec…
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 …
Transistor in 1920
Claude Haiku 4.5: The Transistor in 1920: A Divergent History Through 1980 The 1920s-1930s: Early Development Phase Immediate Technical Trajectory With transistor princ…
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…
Biohacker plan
Claude Haiku 4.5: Comprehensive 3-Month Longevity Optimization Plan TABLE OF CONTENTS 1. Foundation & Assessment 2. Nutritional Architecture 3. Supplement Stack Protoco…
Claude Opus 4.5: COMPREHENSIVE 3-MONTH LONGEVITY OPTIMIZATION PROTOCOL Advanced Biohacker's Blueprint for Peak Performance & Healthspan Extension --- TABLE OF CONTENTS…
Contract review
Claude Haiku 4.5: Critical Analysis: Exploitative Clauses & Recommended Modifications HIGH-RISK CLAUSES 1. SCOPE (Section 1) - Unlimited Modification Without Compensati…
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…
Explain it three ways
Claude Haiku 4.5: Three Explanations of LLM Learning and Generation 1. The Software Engineer You know how you build APIs by defining contracts—input shapes, output shap…
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…
Debug the architecture
Claude Haiku 4.5: Critical Analysis: Real-Time Collaborative Editor Architecture 🔴 CRITICAL ISSUES 1. Split-Brain Synchronization Between Servers Problem: Clients conne…
Claude Opus 4.5: Comprehensive Architecture Review: Real-time Collaborative Document Editor This architecture has several critical issues that will cause data loss, po…
The CEO’s dilemma
Claude Haiku 4.5: 48-Hour Action Plan: Immediate Response Framework I'll be direct: waiting is not a viable option, despite financial pressure. Here's why, then the pla…
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…
Investment memo
Claude Haiku 4.5: INVESTMENT COMMITTEE MEMORANDUM TO: Investment Committee FROM: Research Team RE: LedgerLift (LLLT) – Long/Short/Pass Recommendation DATE: [Today] --- …
Claude Opus 4.5: INVESTMENT COMMITTEE MEMO Company: LedgerLift (LLLT) Sector: B2B SaaS – Spend Management / AP Automation Date: [Internal] Analyst: [Redacted] --- 1. R…
LBO underwrite
Claude Haiku 4.5: HarborTech Services (HTS) – LBO Underwriting --- 1. SOURCES & USES AT CLOSE (FY2025) Item Amount -------------- USES Enterprise Value (12.0x × $120m E…
Claude Opus 4.5: HarborTech Services – LBO Underwriting Memo ENTRY CAPITALIZATION (Close FY2025) Item Calculation Amount --------------------------- Purchase Price 12.…
Is 9.11 bigger than 9.9?
Claude Haiku 4.5: No, 9.11 is not greater than 9.9. 9.11 is less than 9.9. To see why: 9.11 = 9.11 and 9.9 = 9.90, so 9.11 < 9.90.
Claude Opus 4.5: No, 9.11 is not greater than 9.9. When comparing decimals, 9.9 is the same as 9.90. Since 90 hundredths is greater than 11 hundredths, 9.9 9.11.