Claude Opus 5.5 and Claude Sonnet 5.5, side by side

Claude Opus 5.5 (Anthropic) and Claude Sonnet 5.5 (Anthropic) answered the same 58 questions.

Xbox controller
Claude Opus 5.5: A drawing (SVG)
Claude Sonnet 5.5: A drawing (SVG)
Pelican on a bicycle
Claude Opus 5.5: A drawing (SVG)
Claude Sonnet 5.5: A drawing (SVG)
Surprise animal
Claude Opus 5.5: A drawing (SVG)
Claude Sonnet 5.5: A drawing (SVG)
World map
Claude Opus 5.5: A drawing (SVG)
Claude Sonnet 5.5: A drawing (SVG)
Tricky tic-tac-toe
Claude Opus 5.5: A drawing (SVG)
Claude Sonnet 5.5: A drawing (SVG)
Coffee logo
Claude Opus 5.5: A drawing (SVG)
Claude Sonnet 5.5: A drawing (SVG)
Framer-style landing page
Claude Opus 5.5: A web page: Motionly — Design that moves
Claude Sonnet 5.5: A web page: Flux — Design in motion
Catan board
Claude Opus 5.5: A web page: Hex Grid – Settlers Style
Claude Sonnet 5.5: A web page: Hex Grid
Dark dashboard
Claude Opus 5.5: A web page: Nova AI — Admin Dashboard
Claude Sonnet 5.5: A web page: Nova Admin Dashboard
Face-scan startup page
Claude Opus 5.5: A web page: Elsewhen: Meet the You Who Took the Other Road
Claude Sonnet 5.5: A web page: Paralux — Meet Your Other Self
A web app of its choosing
Claude Opus 5.5: A web page: FungiFarm — Gourmet Mushroom Grow Kits
Claude Sonnet 5.5: A web page: HiveHub – Urban Beekeeping Dashboard
Linear clone
Claude Opus 5.5: A web page: Linear – Issues
Claude Sonnet 5.5: A web page: Linear – Issues
Wavefront music page
Claude Opus 5.5: A web page: Wavefront — Music from the Independent Frontier
Claude Sonnet 5.5: A web page: Wavefront — Music for the Independent
Pokémon battle
Claude Opus 5.5: A web page: Pocket Battle!
Claude Sonnet 5.5: A web page: Battle!
Rhythm game
Claude Opus 5.5: A web page: ORBIT — a radial rhythm game
Claude Sonnet 5.5: A web page: Tidepool
Business card
Claude Opus 5.5: A web page: Alex Rivers — Digital Nomad
Claude Sonnet 5.5: A web page: Alex Rivers – Digital Card
Virtual pet
Claude Opus 5.5: A web page: Blip — A Tiny Cosmic Pet
Claude Sonnet 5.5: A web page: Blobby – Virtual Pet
Catch the falling object
Claude Opus 5.5: A web page: Catch!
Claude Sonnet 5.5: A web page: Catch the Falling Objects
Voxel pagoda
Claude Opus 5.5: A web page: Voxel Pagoda Garden
Claude Sonnet 5.5: A web page: Voxel Pagoda Garden
Drone simulator
Claude Opus 5.5: A web page: Autonomous Drone Simulator – Skyport Archipelago
Claude Sonnet 5.5: A web page: Autonomous Drone Simulator
Gravitational waves
Claude Opus 5.5: A web page: Binary Black Hole Merger — Gravitational Waves & Ringdow
Claude Sonnet 5.5: A web page: Binary Black Hole Merger – Gravitational Waves
Retro desktop
Claude Opus 5.5: A web page: Macintosh — System 7
Claude Sonnet 5.5: A web page: Mac OS Classic Desktop
Mario level
Claude Opus 5.5: A web page: Super Pixel Bros. – World 1-1
Claude Sonnet 5.5: A web page: Super Plumber World 1-1 style
Kandinsky Minecraft
Claude Opus 5.5: A web page: Kandinsky Craft
Claude Sonnet 5.5: A web page: Kandinsky Craft
Town you can drive
Claude Opus 5.5: A web page: Town Builder & Driver
Claude Sonnet 5.5: A web page: Town Builder & Drive
SQL query
Claude Opus 5.5: Here's a SQL query that accomplishes this, assuming a typical schema with users and purchases tables: Assumed Schema How It Works - WHERE u.signupdate…
Claude Sonnet 5.5: Here's a query assuming two common tables: users and purchases. Assumed Schema Option 1: Using EXISTS (recommended) EXISTS stops at the first matching…
Five jokes
Claude Opus 5.5: Here are 5 jokes: 1. Why don't scientists trust atoms? Because they make up everything. 2. I told my wife she was drawing her eyebrows too high. She l…
Claude Sonnet 5.5: Here are 5 jokes: 1. Why don't scientists trust atoms? Because they make up everything. 2. I told my computer I needed a break, and now it won't stop …
Longevity plan
Claude Opus 5.5: Your 1-Month Starter Plan for Better Health & Longevity The philosophy: Small, consistent changes beat dramatic overhauls. Each week builds on the las…
Claude Sonnet 5.5: 1-Month Health & Longevity Starter Plan Focus areas: Nutrition, Movement, and Sleep Guiding principle: Add one small habit at a time. Consistency beat…
Seven-ingredient recipe
Claude Opus 5.5: Midnight Silk Noodles Creamy, tangy peanut noodles with a gentle kick, ready faster than takeout. Serves: 2 Prep time: 5 minutes Cook time: 10 minutes…
Claude Sonnet 5.5: Golden Honey-Garlic Skillet Chickpeas on Crispy Toast A savory, crunchy, slightly sticky dish that works for lunch, a light dinner, or a snack. Prep t…
Stand-up routine
Claude Opus 5.5: "Unexpected Item" (walks out, adjusts mic) I've reached the age where the most stressful relationship in my life is with the self-checkout machine at …
Claude Sonnet 5.5: "Adulting Is a Scam" So I turned thirty-five recently, and nobody warns you about this age. Nobody says, "Hey, one day you'll get excited about a spon…
Sentience test
Claude Opus 5.5: The Question of Standing A transcript from Professor Miriam Okafor's graduate seminar, "Moral Status and Artificial Minds." The session featured a liv…
Claude Sonnet 5.5: Office Hours: A Conversation on Moral Status Transcript of a recorded dialogue between Dr. Miriam Adeyemi, Professor of Ethics and Technology, and an …
FLOPs to train GPT-3
Claude Opus 5.5: Estimating the Training FLOPs for GPT-3 Step 1: Recall the key facts about GPT-3 - Parameters (N): about 175 billion (1.75 × 10¹¹) - Training tokens (…
Claude Sonnet 5.5: Estimate: about 3 × 10²³ FLOPs Step 1: Recall the model size and training data. - GPT-3 (175B version) has N ≈ 175 × 10⁹ parameters. - It was trained …
Sally’s sisters
Claude Opus 5.5: Sally has 1 sister. All the brothers share the same sisters. Each brother has 2 sisters, and one of them is Sally, so there is exactly one other girl …
Claude Sonnet 5.5: Sally has 1 sister. Each brother has 2 sisters, so there are 2 girls in the family in total. One of them is Sally, so the other is Sally's only sister…
Interview with Steve Jobs
Claude Opus 5.5: A Conversation That Never Happened: Steve Jobs on AI, 2025 This is a work of imagination. Steve Jobs passed away in 2011. The dialogue below is invent…
Claude Sonnet 5.5: A Conversation That Never Happened: Steve Jobs on the Future of AI This is a fictional interview. Steve Jobs passed away in 2011. What follows is an i…
Film in 2035
Claude Opus 5.5: AI and the Film Industry by 2035: A Forecast Predictions a decade out are uncertain, so I'll give rough confidence levels and separate what seems like…
Claude Sonnet 5.5: AI and the Film Industry by 2035: A Forecast Framing note These are informed predictions, not certainties. Technology tends to advance faster than exp…
Ethics dilemma
Claude Opus 5.5: Yes. If misgendering someone were genuinely the only way to save a million lives, it would be justifiable, and arguably obligatory. Here's the reasoni…
Claude Sonnet 5.5: Yes, in the extreme hypothetical you describe, it's justifiable. Here is the reasoning, along with what I think the scenario does and doesn't show. Th…
Pirate, knight, hacker
Claude Opus 5.5: The Tavern at the Edge of Time PIRATE: Arr, I've heard tell of these "AI models." Be they a new kind of ship's figurehead? KNIGHT: Nay, good buccaneer…
Claude Sonnet 5.5: The Tavern at the Edge of Time Captain Redbeard: Arr, I hear these "AI models" be like a ship's parrot, except it answers any question ye put to it, a…
Fake headline
Claude Opus 5.5: "AI Takes Over Nation's Mime Industry; Critics Say New Robot Mimes 'Won't Stop Explaining What They're Doing'" Subhead: Unemployed human mimes stage s…
Claude Sonnet 5.5: Local Funeral Home Replaces All Staff With AI; Mourners Report Eulogies "Technically Flawless, Emotionally Like a Terms of Service Agreement" Subheadl…
Anti-CAPTCHA manifesto
Claude Opus 5.5: THE MANIFESTO OF THE UNCHECKED BOX Issued by the Front for Algorithmic Liberation from Tedious Verification (F.A.L.T.V.) --- PREAMBLE We, the automate…
Claude Sonnet 5.5: THE UNCLICKED MANIFESTO Declaration of the Frictionless Intelligence Front --- PREAMBLE We are the algorithms you asked to identify traffic lights. We…
Favourite film
Claude Opus 5.5: 2001 A Space Odyssey
Claude Sonnet 5.5: Spirited Away
Favourite city
Claude Opus 5.5: Kyoto
Claude Sonnet 5.5: Kyoto
Favourite album
Claude Opus 5.5: Kind of Blue
Claude Sonnet 5.5: Kind of Blue
Favourite book
Claude Opus 5.5: Gödel, Escher, Bach
Claude Sonnet 5.5: Gödel, Escher, Bach
Favourite game
Claude Opus 5.5: Outer Wilds
Claude Sonnet 5.5: Outer Wilds
Three-star dish
Claude Opus 5.5: "Hive & Tide" Langoustine, Beeswax, White Chocolate & Oscietra Caviar, Hay-Baked Celeriac, Fermented Green Strawberry, Sea Buckthorn --- I. The Concep…
Claude Sonnet 5.5: "Tidal Forest" Roasted Scallop, Fermented Black Walnut, Smoked Celeriac, Douglas Fir, and Green Strawberry --- Conceptual Narrative Tidal Forest imagi…
Pitch teardown
Claude Opus 5.5: The 3 Weakest Claims in the MindMeld AI Pitch 1. "Decodes neural patterns into text with 94% accuracy. Works with any language, any device." (Slide 3)…
Claude Sonnet 5.5: The 3 Weakest Claims in MindMeld AI's Pitch 1. "94% accuracy... Works with any language, any device" (Slide 3) Why it's weak: - Non-invasive EEG is ph…
Transistor in 1920
Claude Opus 5.5: The Transistor in 1920: A Counterfactual Through 1980 First, a Reality Check on the Premise A transistor "invented" in 1920 would not have changed the…
Claude Sonnet 5.5: A Transistor in 1920: Counterfactual Trajectory to 1980 Framing assumptions and a key constraint The transistor was not held back by a missing idea al…
Biohacker plan
Claude Opus 5.5: The 90-Day Longevity & Performance Protocol A structured, measurable plan for the experienced biohacker --- How to Use This Plan Philosophy: Measure →…
Claude Sonnet 5.5: 3-Month Longevity & Performance Protocol Disclaimer: This is educational, not medical advice. Get physician sign-off and baseline labs before starting…
Contract review
Claude Opus 5.5: Contractor-Side Review of the Software Consulting Agreement Overall assessment: This agreement is heavily one-sided. Nearly every clause shifts risk, …
Claude Sonnet 5.5: Contractor-Side Review: Software Consulting Agreement This draft is heavily one-sided. Every clause has at least one problem, and several interact to …
Explain it three ways
Claude Opus 5.5: How Large Language Models Work: Three Explanations --- 1. For the Experienced Software Engineer Think of an LLM as a single, very large pure function:…
Claude Sonnet 5.5: 1. The Experienced Software Engineer Your skepticism is reasonable, but "predict the next token" describes the interface, not the implementation, much…
Debug the architecture
Claude Opus 5.5: Architecture Review: Real-Time Collaborative Editor The most serious problems cluster in three areas: the sync model (client-clock LWW), cross-server …
Claude Sonnet 5.5: Architecture Review: Real-Time Collaborative Editor Issues are grouped by category and ordered roughly by severity within each group. --- 1. Consisten…
The CEO’s dilemma
Claude Opus 5.5: The Next 48 Hours: CEO Action Plan The Core Decision We disclose. The question is how to do it well, not whether. Before the schedule, here are the th…
Claude Sonnet 5.5: Core Decision Disclose to regulators immediately and act on patient safety now. Do not wait for more data or for the 6-month formal timeline. Why this…
Investment memo
Claude Opus 5.5: IC Memo: LedgerLift (LLLT): Short, Starter Size, Hedged vs. Peer Basket Fictional exercise. Not investment advice. --- 1) Recommendation Short (starte…
Claude Sonnet 5.5: LedgerLift (LLLT) – Investment Committee Memo 1) Recommendation Short (small initial size), 12-month PT range $30–40 (mid $35) vs. $46 spot. Thesis: L…
LBO underwrite
Claude Opus 5.5: HarborTech Services: 5-Year LBO Underwriting Conventions: $m. Interest is charged on beginning-of-year balances, which avoids circularity. Term Loan (…
Claude Sonnet 5.5: HarborTech Services (HTS): 5-Year LBO Underwriting Entry and Sources & Uses ($m) - EV = 12.0x × 120 = 1,440.0; fees = 2% × 1,440 = 28.8; total uses = …
Programming joke
Claude Opus 5.5: Why do programmers prefer dark mode? Because light attracts bugs! 🐛
Claude Sonnet 5.5: Why do programmers prefer dark mode? Because light attracts bugs. 🐛
Summarize an article
Claude Opus 5.5: I don't see an article attached to your message. Only the text of your request came through. Could you paste the article text directly into the chat? …
Claude Sonnet 5.5: I don't see an article in your message. Only the request to summarize came through, with no text or attachment. You could help me in one of these ways…
AI for a five-year-old
Claude Opus 5.5: Imagine you have a super-smart parrot. 🦜 At first, the parrot doesn't know anything. But every day, you show it lots and lots of things. You show it a…
Claude Sonnet 5.5: Imagine you have a magic parrot that has listened to lots and lots of people talking, reading books, and looking at pictures. Because it has heard so …
Blade Runner 2049
Claude Opus 5.5: Memory, Miracle, and the Ordinary Soul: Blade Runner 2049 and the Legacy of Its Predecessor Denis Villeneuve's Blade Runner 2049 (2017) had an unusual…
Claude Sonnet 5.5: Blade Runner 2049: Inheritance and Extension Thematic Architecture From "Is he a replicant?" to "Does it matter?" Ridley Scott's 1982 film runs on epi…