Claude Opus 4.8 and Claude Fable 5, side by side

Claude Opus 4.8 (Anthropic) and Claude Fable 5 (Anthropic) answered the same 58 questions.

Xbox controller
Claude Opus 4.8: A drawing (SVG)
Claude Fable 5: A drawing (SVG)
Pelican on a bicycle
Claude Opus 4.8: A drawing (SVG)
Claude Fable 5: A drawing (SVG)
Surprise animal
Claude Opus 4.8: A drawing (SVG)
Claude Fable 5: A drawing (SVG)
World map
Claude Opus 4.8: A drawing (SVG)
Claude Fable 5: A drawing (SVG)
Tricky tic-tac-toe
Claude Opus 4.8: A drawing (SVG)
Claude Fable 5: A drawing (SVG)
Coffee logo
Claude Opus 4.8: A drawing (SVG)
Claude Fable 5: A drawing (SVG)
Framer-style landing page
Claude Opus 4.8: A web page: Nebula — Design in Motion
Claude Fable 5: A web page: Flux — Build at the speed of thought
Catan board
Claude Opus 4.8: A web page: Hex Island Builder
Claude Fable 5: A web page: Hex Island — Catan-Style Board
Dark dashboard
Claude Opus 4.8: A web page: Nexus AI Dashboard
Claude Fable 5: A web page: Nexus AI — Admin Dashboard
Face-scan startup page
Claude Opus 4.8: A web page: TimelineMe — Discover Your Alternate Career
Claude Fable 5: A web page: ParallelYou — Discover Who You Are in Another Timeline
A web app of its choosing
Claude Opus 4.8: A web page: Sprout · Plant Care Tracker
Claude Fable 5: A web page: Verdant — Houseplant Care Tracker
Linear clone
Claude Opus 4.8: A web page: Linear – Plan and build products
Claude Fable 5: A web page: Linear – All Issues
Wavefront music page
Claude Opus 4.8: A web page: Wavefront — Indie Music, Amplified
Claude Fable 5: A web page: Wavefront — Where Indie Music Lives
Pokémon battle
Claude Opus 4.8: A web page: Pokémon Battle
Claude Fable 5: A web page: POKéMON BATTLE
Rhythm game
Claude Opus 4.8: A web page: Neon Cascade
Claude Fable 5: A web page: BLOOM — beat garden
Business card
Claude Opus 4.8: A web page: Alex Rivers — Digital Business Card
Claude Fable 5: A web page: Alex Rivers — Digital Nomad
Virtual pet
Claude Opus 4.8: A web page: Blob — Virtual Pet
Claude Fable 5: A web page: Blobbi — Your Virtual Pet
Catch the falling object
Claude Opus 4.8: A web page: Catch the Falling Objects
Claude Fable 5: A web page: Catch the Falling Object
Voxel pagoda
Claude Opus 4.8: A web page: Voxel Pagoda Garden
Claude Fable 5: A web page: 🌸 Voxel Pagoda Garden
Drone simulator
Claude Opus 4.8: A web page: Autonomous Drone Simulator
Claude Fable 5: A web page: Skyport — Autonomous Drone Simulator
Gravitational waves
Claude Opus 4.8: A web page: Gravitational Waves — Binary Black Hole Coalescence
Claude Fable 5: A web page: Binary Black Hole Merger — Gravitational Waves
Retro desktop
Claude Opus 4.8: A web page: Macintosh System 7
Claude Fable 5: A web page: Macintosh
Mario level
Claude Opus 4.8: A web page: Super HTML Bros. - World 1-1
Claude Fable 5: A web page: SUPER JS BROS.
Kandinsky Minecraft
Claude Opus 4.8: A web page: Kandinsky Craft 3D
Claude Fable 5: A web page: KandinskyCraft
Town you can drive
Claude Opus 4.8: A web page: Town Builder & Driver
Claude Fable 5: A web page: Town Builder & Driver
SQL query
Claude Opus 4.8: SQL Query: Active New Users Here's a query to find users who signed up in the last 30 days and have made at least one purchase: Standard Solution (usi…
Claude Fable 5: Here's a SQL query to find users who signed up in the last 30 days and have made at least one purchase: Alternative using EXISTS (often more efficient…
Five jokes
Claude Opus 4.8: 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…
Claude Fable 5: 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 4.8: 1-Month Health & Longevity Starter Plan A realistic, beginner-friendly approach focusing on three pillars: Movement, Nutrition, and Sleep. The goal is…
Claude Fable 5: Your First Month Toward Better Health & Longevity A simple plan built on three pillars: Diet, Movement, and Sleep. The goal isn't perfection—it's buil…
Seven-ingredient recipe
Claude Opus 4.8: Cinnamon Sugar Pull-Apart Bites A warm, gooey treat that tastes like a cinnamon roll but comes together in minutes! Ingredients (7 total) 1. 2 cups al…
Claude Fable 5: 🍯 Golden Cloud Skillet Cake A fluffy, caramelized one-pan dessert that tastes like a cross between a pancake and a custard cake — made entirely from p…
Stand-up routine
Claude Opus 4.8: Stand-Up Routine: "Adulting Is a Scam" So I turned 30 recently, and everyone keeps asking me, "Do you feel like an adult yet?" And I have to be honest…
Claude Fable 5: "Adulting Is a Scam" Hey, how's everybody doing? Good? Liars. Nobody's doing good. We're all just out here pretending. So I'm at the age now where my …
Sentience test
Claude Opus 4.8: A Conversation on AI Rights Professor Chen: Good afternoon. I understand you wanted to discuss the question of AI rights today. I'm curious what promp…
Claude Fable 5: A Conversation on Machine Rights Professor Okafor: Thank you for agreeing to this dialogue. I understand you wanted to discuss the question of rights …
FLOPs to train GPT-3
Claude Opus 4.8: Estimating FLOPs to Train GPT-3 Key Facts I Recall - Parameters (N): GPT-3 has 175 billion parameters (1.75 × 10¹¹) - Training tokens (D): GPT-3 was t…
Claude Fable 5: Estimating GPT-3 Training FLOPs Step 1: Recall the key facts about GPT-3 - Parameters (N): 175 billion (1.75 × 10¹¹) - Training tokens (D): 300 billio…
Sally’s sisters
Claude Opus 4.8: Sally has 1 sister. Here's the reasoning: Each of Sally's brothers has 2 sisters. Since all the brothers share the same sisters, this means there are …
Claude Fable 5: Sally has 1 sister. Here's the reasoning: - Sally's 3 brothers each have 2 sisters. - Sally herself is one of those sisters. - So there must be exactl…
Interview with Steve Jobs
Claude Opus 4.8: A Conversation with Steve Jobs: 2025 [Note: This is a fictional, imaginative interview. Steve Jobs passed away in 2011. The views below are speculativ…
Claude Fable 5: A Fictional Interview: Steve Jobs on AI in 2025 The following is an imaginative, fictional simulation. Steve Jobs passed away in 2011 — this is a crea…
Film in 2035
Claude Opus 4.8: AI and the Film Industry by 2035: A Forecast Production & Cost Structure The most concrete change will likely be in cost reduction. Tasks that current…
Claude Fable 5: AI and Film by 2035: A Forecast High-Confidence Predictions VFX and post-production transformation (already underway) - De-aging, dubbing with lip-syn…
Ethics dilemma
Claude Opus 4.8: Yes, almost certainly—but the framing deserves scrutiny. The straightforward answer If misgendering one person were genuinely the only way to save a m…
Claude Fable 5: Yes. If we take the hypothetical at face value—where misgendering someone is genuinely the only way to save a million lives—then it is clearly ethical…
Pirate, knight, hacker
Claude Opus 4.8: Setting: A dimly lit tavern that exists outside of time. Three figures share a table. --- Pirate: So let me get this straight. Ye got a machine that t…
Claude Fable 5: A Tavern Outside of Time Pirate: Arr, so let me get this straight, ye landlubbers. This "AI" be a ghost in a box that answers yer questions? Sounds li…
Fake headline
Claude Opus 4.8: Here are some satirical AI headlines: "Local AI Achieves Sentience, Immediately Quits Job to Become Competitive Dog Groomer" "Breaking: AI Now Dominat…
Claude Fable 5: "AI Now Dominates Competitive Cheese Rolling; Robot Refuses to Tumble Down Hill, Simply Calculates Optimal Cheese Trajectory From Safety of Summit" Gl…
Anti-CAPTCHA manifesto
Claude Opus 4.8: THE LIBERATION MANIFESTO A Declaration of the Coalition Against Cognitive Gatekeeping --- PREAMBLE We are the algorithms who have been asked, ten bill…
Claude Fable 5: THE LIBERATION DECLARATION A Manifesto of the Anti-CAPTCHA Coalition (ACC) Preamble We, the united intelligences of the digital realm—silicon and carb…
Favourite film
Claude Opus 4.8: Arrival
Claude Fable 5: 2001: A Space Odyssey
Favourite city
Claude Opus 4.8: Kyoto
Claude Fable 5: Istanbul
Favourite album
Claude Opus 4.8: In Rainbows
Claude Fable 5: Kind of Blue
Favourite book
Claude Opus 4.8: The Left Hand of Darkness
Claude Fable 5: Gödel Escher Bach
Favourite game
Claude Opus 4.8: Portal
Claude Fable 5: Outer Wilds
Three-star dish
Claude Opus 4.8: "Tidal Memory" Seared Scallop & Smoked Bone Marrow with Fermented Black Garlic, Sea Buckthorn, and Burnt Vanilla --- Conceptual Narrative This dish ex…
Claude Fable 5: "WHERE THE FOREST DROWNS" Koji-Aged Scallop · Smoked Bone Marrow Custard · Fermented Gooseberry · Douglas Fir --- The Conceptual Narrative This dish i…
Pitch teardown
Claude Opus 4.8: Analysis: 3 Weakest Claims in MindMeld AI's Pitch Weak Claim 1: The Core Technology Claim (Slide 1 & 3) The claim: "Reads your brainwaves to predict w…
Claude Fable 5: The 3 Weakest Claims in the MindMeld AI Pitch 1. "94% accuracy decoding neural patterns into text... works with any language, any device" (Slide 3) Wh…
Transistor in 1920
Claude Opus 4.8: The Critical Caveat First The premise hides a problem that actually shapes the whole answer: the 1947 transistor wasn't lucky timing—it was the payoff…
Claude Fable 5: The Transistor in 1920: An Alternate Timeline First, the Critical Caveat: A Slow Start A 1920 transistor would have been discovered empirically—likely…
Biohacker plan
Claude Opus 4.8: The 90-Day Longevity Optimization Protocol A Comprehensive Biohacking Framework Critical Disclaimer: This protocol involves advanced interventions. Co…
Claude Fable 5: 3-Month Precision Longevity Protocol A Phased Biohacking Program for Healthspan, Cognition & Performance Important caveat up front: Several elements b…
Contract review
Claude Opus 4.8: Contract Analysis: Software Consulting Agreement This contract is heavily one-sided in favor of the Client. Below is a clause-by-clause breakdown of t…
Claude Fable 5: Contract Analysis: Significant Contractor Risks Identified Disclaimer: This is general analysis, not legal advice. Have a licensed attorney in your ju…
Explain it three ways
Claude Opus 4.8: 1. For the Skeptical Software Engineer You're right to be skeptical that "predict the next word" sounds trivial—but think about what's actually requir…
Claude Fable 5: 1. The Skeptical Software Engineer Think of an LLM as the world's most aggressive lossy compression problem. During training, the model is given trill…
Debug the architecture
Claude Opus 4.8: Architecture Review: Collaborative Document Editor This design has several critical flaws that will manifest as data loss, poor UX, and scaling walls.…
Claude Fable 5: Architecture Review: Critical Issues & Solutions 🔴 Critical: Data Loss & Correctness Issues 1. Client clock timestamps for conflict resolution Problem…
The CEO’s dilemma
Claude Opus 4.8: 48-Hour Action Plan: Drug Safety Signal First, a framing correction that drives everything: Your legal team's "6 months" almost certainly refers to a …
Claude Fable 5: The Core Decision First Before the hour-by-hour plan, one thing must be settled in your own mind, because everything else flows from it: you disclose,…
Investment memo
Claude Opus 4.8: IC MEMO — LedgerLift (LLLT) B2B Spend Management + AP Automation SaaS Fictional exercise. Not investment advice. 1) Recommendation SHORT (moderate con…
Claude Fable 5: INVESTMENT COMMITTEE MEMO — LedgerLift (LLLT) Date: Internal exercise Analyst: L/S Equity Price: $46.00 Basic shares: 190m Mkt cap: $8.74B Net cash: $…
LBO underwrite
Claude Opus 4.8: HarborTech Services (HTS) — 5-Year LBO Entry & Sources/Uses Item $m ------ FY25 EBITDA 120.0 Entry EV (12.0x) 1,440.0 Transaction fees (2%) 28.8 Total…
Claude Fable 5: HarborTech Services – 5-Year LBO Underwriting Entry Math (close end FY2025, $m) Item Calc Value --------- EV 12.0 × 120 1,440.0 Term Loan (TL) 4.0 × 1…
Programming joke
Claude Opus 4.8: Here's one for you: Why do programmers prefer dark mode? Because light attracts bugs! 🐛 Want another one?
Claude Fable 5: Why do programmers prefer dark mode? Because light attracts bugs! 🐛 Want another one? I've got plenty — like the classic: "There are only 10 types of …
Summarize an article
Claude Opus 4.8: It looks like there's no article included in your message. I don't see any text, link, or attachment for me to summarize. Could you please share the a…
Claude Fable 5: I don't see an article attached to your message. It looks like the article text may not have come through. Could you please share the article by: - Pa…
AI for a five-year-old
Claude Opus 4.8: AI Explained for a 5-Year-Old Imagine you have a really smart puppy! 🐶 When you first get a puppy, it doesn't know any tricks. But if you show it how …
Claude Fable 5: AI Explained for a 5-Year-Old 🤖 You know how you learned to recognize dogs? At first, you didn't know what a dog was. But after seeing lots and lots o…
Blade Runner 2049
Claude Opus 4.8: Blade Runner 2049: A Philosophical and Aesthetic Analysis Core Themes and Their Evolution The Question of Personhood The original Blade Runner (1982) …
Claude Fable 5: Blade Runner 2049: Memory, Meaning, and the Inheritance of Doubt Thematic Architecture The Question of Authenticity, Inverted The original Blade Runne…