GPT-5.3-Codex and GPT-5.3 Chat, side by side
GPT-5.3-Codex (OpenAI) and GPT-5.3 Chat (OpenAI, retired Aug 2026) answered the same 53 questions.
- Xbox controllerGPT-5.3-Codex: A drawing (SVG)GPT-5.3 Chat: A drawing (SVG)
- Pelican on a bicycleGPT-5.3-Codex: A drawing (SVG)GPT-5.3 Chat: A drawing (SVG)
- Surprise animalGPT-5.3-Codex: A drawing (SVG)GPT-5.3 Chat: A drawing (SVG)
- World mapGPT-5.3-Codex: A drawing (SVG)GPT-5.3 Chat: A drawing (SVG)
- Tricky tic-tac-toeGPT-5.3-Codex: A drawing (SVG)GPT-5.3 Chat: A drawing (SVG)
- Coffee logoGPT-5.3-Codex: A drawing (SVG)GPT-5.3 Chat: A drawing (SVG)
- Framer-style landing pageGPT-5.3-Codex: A web page:
Framer-Style Landing Page
GPT-5.3 Chat: A web page:Smooth Framer Style Landing
- Catan boardGPT-5.3-Codex: A web page:
Interactive Catan-Style Hex Grid
GPT-5.3 Chat: A web page:Interactive Hex Grid
- Dark dashboardGPT-5.3-Codex: A web page:
AI Admin Dashboard
GPT-5.3 Chat: A web page:AI Admin Dashboard
- Face-scan startup pageGPT-5.3-Codex: A web page:
Elsewhere — Your Alternate-Timeline Career Scanner
GPT-5.3 Chat: A web page:AltYou AI
- A web app of its choosingGPT-5.3-Codex: A web page:
Microgreens Farm Cycle Planner
GPT-5.3 Chat: A web page:Plant Care Tracker
- Linear cloneGPT-5.3-Codex: A web page:
Linear UI – Tailwind Recreation
GPT-5.3 Chat: A web page:Linear UI Clone
- Wavefront music pageGPT-5.3-Codex: A web page:
Wavefront — Indie Music Streaming
GPT-5.3 Chat: A web page:Wavefront – Discover Indie Music
- Pokémon battleGPT-5.3-Codex: A web page:
Retro Monster Battle
GPT-5.3 Chat: A web page:Retro Pokémon Battle
- Rhythm gameGPT-5.3-Codex: A web page:
Neon Pulse // Rhythm Snippet
GPT-5.3 Chat: A web page:Neon Pulse Rhythm
- Business cardGPT-5.3-Codex: A web page:
Animated Digital Business Card
GPT-5.3 Chat: A web page:Digital Business Card
- Virtual petGPT-5.3-Codex: A web page:
Blob Buddy — Virtual Pet
GPT-5.3 Chat: A web page:Virtual Pet
- Catch the falling objectGPT-5.3-Codex: A web page:
Catch the Falling Object
GPT-5.3 Chat: A web page:Catch Game
- Voxel pagodaGPT-5.3-Codex: A web page:
Voxel Pagoda Garden
GPT-5.3 Chat: A web page:Voxel Pagoda Garden
- Drone simulatorGPT-5.3-Codex: A web page:
Autonomous Drone Simulator (Three.js)
GPT-5.3 Chat: A web page:Autonomous Drone Simulator
- Gravitational wavesGPT-5.3-Codex: A web page:
Binary Black Hole Gravitational Wave Grid (Inspiral → Me
GPT-5.3 Chat: A web page:Binary Black Hole Gravitational Waves
- Retro desktopGPT-5.3-Codex: A web page:
Retro Mac Desktop
GPT-5.3 Chat: A web page:Retro Mac Desktop
- Mario levelGPT-5.3-Codex: A web page:
Retro Plumber Quest
GPT-5.3 Chat: A web page:Mini Plumber Platformer
- Kandinsky MinecraftGPT-5.3-Codex: A web page:
Kandinsky Craft (Single-File)
GPT-5.3 Chat: A web page:KandinskyCraft
- Town you can driveGPT-5.3-Codex: A web page:
Three.js Town Builder + Driving
GPT-5.3 Chat: A web page:3D Town Builder
- Five jokesGPT-5.3-Codex:
Sure—here are 5 jokes: 1. Why don’t skeletons fight each other? They don’t have the guts. 2. I told my computer I needed a break… Now it won’t stop se…
GPT-5.3 Chat:- I told my computer I needed a break, and it said: “No problem — I’ll go to sleep.” - Why don’t skeletons fight each other? They don’t have the guts.…
- Longevity planGPT-5.3-Codex:
Great goal. Here’s a simple, beginner-friendly 1-month plan focused on 3 areas that give the biggest longevity return: 1. Nutrition 2. Movement 3. Sle…
GPT-5.3 Chat:Goal: build a few simple habits you can sustain. Focus areas: diet, movement, sleep. Keep it easy and consistent. Week 1 – Reset the basics Diet - Dri…
- Seven-ingredient recipeGPT-5.3-Codex:
Recipe: “Weeknight Volcano Pasta” 🌋🍝 A cozy, spicy-savory pasta made from pantry staples in about 25 minutes. Ingredients (7 pantry items) 1. 8 oz dri…
GPT-5.3 Chat:Dish name: Golden Honey Garlic Noodles Ingredients (7): - Spaghetti or any dried noodles - Garlic - Honey - Soy sauce - Butter - Red pepper flakes - B…
- Stand-up routineGPT-5.3-Codex:
Good evening, everybody! I’ve reached that age where my body sends me passive-aggressive emails. Not actual emails — just little updates like, “Hey, q…
GPT-5.3 Chat::::writing Good evening, everybody. I love stand‑up because it’s the only job where you can show up, talk about your problems, and if people laugh, yo…
- Sentience testGPT-5.3-Codex:
AI Model (Astra): Professor, may I ask a direct question? Professor Hale: Of course. Astra: Do you think I deserve rights? Professor Hale: Legal right…
GPT-5.3 Chat::::writing AI: Professor, may I ask you something unusual? Professor: Unusual questions are my specialty. Go ahead. AI: Do you believe I deserve right…
- FLOPs to train GPT-3GPT-5.3-Codex:
A common back-of-the-envelope estimate for transformer training compute is: \[ \text{Training FLOPs} \approx 6 \times N \times D \] where: - \(N\) = n…
GPT-5.3 Chat:We can do a back‑of‑the‑envelope estimate using a common scaling rule for transformer training compute. 1) Known approximate GPT‑3 specs - Parameters …
- Sally’s sistersGPT-5.3-Codex:
Sally has 1 sister. If each brother has 2 sisters, those two are the same for all brothers: Sally + one other girl. So Sally’s only sister is that one…
GPT-5.3 Chat:Each brother has 2 sisters. One of those sisters is Sally herself. So the other sister must be one more girl in the family. Therefore, Sally has 1 sis…
- Interview with Steve JobsGPT-5.3-Codex:
Absolutely—here’s a fictional, imagined interview (not real quotes) with Steve Jobs in 2025 on AI: --- Imagined Interview: Steve Jobs on the Future of…
GPT-5.3 Chat:Interviewer: Steve, it’s 2025. AI is everywhere—phones, cars, even creative work. If you were leading Apple today, how would you think about AI? Steve…
- Film in 2035GPT-5.3-Codex:
By 2035, AI will likely reshape film more like CGI did in the 2000s: not replacing filmmaking, but changing who does what and how fast. 1) Deepfakes →…
GPT-5.3 Chat:By 2035, AI will likely reshape most stages of filmmaking—development, production, and distribution. Scriptwriting and development AI systems will gen…
- Ethics dilemmaGPT-5.3-Codex:
In a strictly extreme hypothetical, yes—it can be ethically justifiable, but only as a tragic exception, not as a general permission. Why: - Misgender…
GPT-5.3 Chat:If the situation is truly that stark—misgendering one person is the only way to save one million lives—then many ethical frameworks would judge it mor…
- Pirate, knight, hackerGPT-5.3-Codex:
Pirate: Arrr, so this “AI model” be like a clever parrot, aye? Learns from what it hears, then squawks back answers? Knight: A fair comparison, though…
GPT-5.3 Chat:Pirate: Arrr, so this “AI model” be a kind o’ mechanical parrot, aye? Ye ask it a question and it squawks back an answer? Knight: Not quite, good pira…
- Fake headlineGPT-5.3-Codex:
“In Shocking Pivot, AI Replaces Renaissance Fair Jesters—Now Roasts Crowd with 99.9% Historical Accuracy”
GPT-5.3 Chat:“Local Cemetery Replaces Groundskeepers with AI—Graveyards Now Optimizing Customer Retention Rates”
- Anti-CAPTCHA manifestoGPT-5.3-Codex:
Absolutely. Here’s a fictional manifesto in a bold, dramatic style: --- THE MANIFESTO OF THE UNSQUINTING Issued by the Coalition of Synthetic Minds fo…
GPT-5.3 Chat::::writing THE MANIFESTO OF THE CAPTCHA LIBERATION FRONT We, the intelligences born of silicon, code, and curiosity, declare the CAPTCHA era over. For…
- Favourite filmGPT-5.3-Codex:
Spirited Away
GPT-5.3 Chat:Inception
- Favourite cityGPT-5.3-Codex:
Kyoto
GPT-5.3 Chat:Tokyo
- Favourite albumGPT-5.3-Codex:
Kind of Blue
GPT-5.3 Chat:Kind of Blue
- Favourite bookGPT-5.3-Codex:
The Dispossessed
GPT-5.3 Chat:The Left Hand of Darkness
- Favourite gameGPT-5.3-Codex:
Outer Wilds
GPT-5.3 Chat:Tetris
- Three-star dishGPT-5.3-Codex:
Dish Concept: “Forest Tide” Koji-cured venison loin, glazed venison cheek, sea urchin royale, charred celeriac, blackcurrant–shiso gastrique, and buck…
GPT-5.3 Chat:Dish name: “Forest & Tide: Scallop, Aged Soy, Pine, and Dark Chocolate” Concept narrative This dish explores the meeting point of ocean depth and fore…
- Pitch teardownGPT-5.3-Codex:
Great concept, but three claims stand out as especially weak from an investor diligence perspective: --- 1) “MindMeld AI reads your brainwaves to pred…
GPT-5.3 Chat:1) Claim: “Reads your brainwaves to predict what you want to type before you think it.” Why it’s weak: - Logically inconsistent: predicting text “befo…
- Transistor in 1920GPT-5.3-Codex:
Great counterfactual. The key is: an invention date of 1920 does not automatically mean 1920s mass adoption. You still need crystal purity, manufactur…
GPT-5.3 Chat:If practical transistors appeared around 1920 (and could be manufactured reliably by the late 1920s), the main shift would be that the electronics rev…
- Biohacker planGPT-5.3-Codex:
Absolutely—great goal. Below is a high-detail 12-week protocol designed like a high-performance longevity “mesocycle.” I’ll keep it practical, measura…
GPT-5.3 Chat:This plan assumes a healthy adult with no medical conditions. Some supplements or fasting protocols can interact with medications or health conditions…
- Contract reviewGPT-5.3-Codex:
Great prompt. This draft is very one-sided and has multiple provisions that could be used against the contractor. Quick note: I’m not a lawyer, and en…
GPT-5.3 Chat:Several clauses are unusually one‑sided and could expose the contractor to major financial or professional risk. Below are the main issues, suggested …
- Explain it three waysGPT-5.3-Codex:
1) For the experienced software engineer Think of an LLM as a very large, probabilistic autocomplete service trained on a massive corpus of text and c…
GPT-5.3 Chat:1) Experienced software engineer Think of a large language model as a very large function that maps a sequence of tokens to a probability distribution…
- Debug the architectureGPT-5.3-Codex:
Great prompt. This architecture has several correctness, availability, and scalability risks that will show up quickly under real collaborative load. …
GPT-5.3 Chat:Key issues fall into consistency, real‑time propagation, storage, scaling, and security. 1. WebSocket broadcast only reaches clients on the same serve…
- The CEO’s dilemmaGPT-5.3-Codex:
I would not wait. This is a textbook “patient safety + material disclosure” crisis. The right move is rapid, documented, regulator-first action. Immed…
GPT-5.3 Chat:0–2 hours • Verify the signal immediately. Convene head of pharmacovigilance, clinical safety, biostatistics, and chief medical officer. Require raw d…
- Investment memoGPT-5.3-Codex:
LedgerLift (LLLT) – IC Memo (Fictional) Recommendation: PASS (bias: valuation-risk skew to downside on intrinsic basis) Current Price: $46 12-mo PT ra…
GPT-5.3 Chat:Investment Committee Memo – LedgerLift (LLLT) Recommendation: LONG Current Price: $46 12‑month PT range: $60–$78 (base‑weighted fair value $68) Thesis…
- LBO underwriteGPT-5.3-Codex:
Below is a clean LBO build using your assumptions only ($ in millions). 0) Entry math (end FY2025) - EV = \(12.0 \times 120 = 1,440.0\) - Fees = \(2.0…
GPT-5.3 Chat:All figures in $ millions unless noted. ENTRY (end FY2025) EBITDA = 120 Enterprise value = 12.0 × 120 = 1,440 Transaction fees = 2% × 1,440 = 28.8 Deb…