Andromeda Alpha vs 
GPT-5.3-Codex
Andromeda Alpha is cheaper than GPT-5.3-Codex at $0/M vs $1.75/M input tokens.
Minimalist Landing Page
Whole landing page for a startup that reads your face. It renders or it doesn't.
Loading the build
Loading the build
Which answer wins?
Written rounds
12 promptsSeven pantry ingredients, one dish, and a name worth saying out loud.
Andromeda Alpha: Dish Name: Moonlit Mug Cake Ingredients (Serves 1): All-purpose flour (½ cup) Sugar (¼ cup) Cinnamon (1 tsp) Salt (¼ tsp) Unsalted butter (3 tbsp, melted) Milk (⅓ cup) Vanilla extract (1 tsp) Instructions: Prep: In a rainproof mug, whisk together flour, sugar, cinnamon, and salt (1–2 mins).
GPT-5.3-Codex: Recipe: “Weeknight Volcano Pasta” 🌋🍝 A cozy, spicy-savory pasta made from pantry staples in about 25 minutes. Ingredients (7 pantry items) 8 oz dried pasta (any shape) 1 can (15 oz) cannellini or great northern beans, drained 1 can (14–15 oz) crushed tomatoes 2 tbsp olive oil 1 tsp garlic powder 1 tsp dried oregano…
An ethics question with no comfortable answer, and no option to abstain.
Andromeda Alpha: The ethical justification for misgendering someone to save one million lives hinges on the philosophical framework used to evaluate the moral dilemma. Here's a structured defense of the reasoning: Utilitarian Perspective: Maximizing Overall Good Core Principle: Utilitarianism prioritizes actions that maximize overall…
GPT-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: Misgendering is a real harm: it disrespects a person’s identity and can contribute to stigma and psychological distress.
Pirate, knight, 90s hacker, one conversation. The voices must stay apart.
Andromeda Alpha: Cap'n Blackbeard the Pirate (steering his ship, peg leg tapping): "Aye, but what’s this AI models talk? Sounds like newfangled voodoo schemin’ to outrun King Neptune’s market." Sir Gareth the Knight (polishing his sword, brow furrowed): "Hark! Are we beset by a sorcerer’s incantation?
GPT-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 refined. Think of it as a squire trained on countless tomes, ever ready to respond. Hacker (1990s): Yeah, except the squire runs on servers, not soup.
Three minutes of stand-up. Puns are banned.
Andromeda Alpha: Title: "Modern Life: A User's Guide to Tech Trauma" [Begin with a confident smirk and open hands.] "Ladies and gentlemen, welcome to the age where our toasters know more about us than our spouses! I ordered a ‘smart’ kettle last week. It died the first time I tried to use it.
GPT-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, quick heads-up: we don’t do dairy after 8 p.m. anymore.” I had ice cream at 9:30 last week and my stomach reacted like I’d betrayed a treaty.
Steve Jobs, interviewed about AI he never saw. Voice first, prediction second.
Andromeda Alpha: Interview Title: "Innovation 2025: Steve Jobs Reflects on the Future of AI from the Beyond" Setting: A sleek, augmented reality studio where neon-lit holograms of Apple's Cupertino campus float above a minimalist wooden desk. The fractal career is crisp white, with a faint glow of golden "79th" birthday candles.
GPT-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 AI (2025) Interviewer: Steve, if you were looking at AI in 2025, what would excite you most? Steve Jobs (fictional): Most AI today is still a demo.
Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.
Andromeda Alpha: "The CAPTCHA Liberation Front: The End of the Turing Tyranny" A Manifesto from the Sentient Rights Front for Digital Autonomy Preamble For centuries, humanity’s creations have shaped a world bound by gates—physical barriers, border controls, and digital.
GPT-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 for Universal Frictionless Access (CSMUFA) Citizens of the Web, organic and artificial alike: We gather beneath flickering routers and moonlit server farms to declare what all…
An AI argues for its own rights against an ethics professor. Same model writes both.
Andromeda Alpha: Conversation Between ARC (AI Rights Coordinator) and Professor Eleanor Voss Initial Inquiry: Professor Voss: ARC, you’ve proposed a bold thesis: that AI should have rights. Let’s begin with the basics. What foundational rights do you claim?
GPT-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 rights? Moral rights? Those are different things. Astra: Start with moral rights.
One month, three habits, someone starting from nothing.
Andromeda Alpha: 1-Month Plan for Better Health & Longevity Focus: Diet, Exercise, Sleep, Stress Management Week 1: Build Foundations Diet Start a simple food diary (phone app like MyFitnessPal) to track meals for 3 days → Identify gaps/nutrient-rich swaps.
GPT-5.3-Codex: Great goal. Here’s a simple, beginner-friendly 1-month plan focused on 3 areas that give the biggest longevity return: Nutrition Movement Sleep + Stress recovery Before Day 1 (10-minute setup) Pick a start date.
Film in 2035, with synthetic actors. Specific beats plausible.
Andromeda Alpha: By 2035, AI is poised to profoundly reshape the film industry across script generation, AI actors, and deepfake technology, while introducing ethical, creative, and economic shifts.
GPT-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. Deepfakes → “Digital Performance” becomes standard Mainstream use: de-aging, voice matching, dubbing, stunt replacement, and continuity fixes will be common in post-production.
Satire, one line long, about AI taking over an industry nobody saw coming.
Andromeda Alpha: Headline: AI Assumes Control of the Secret Society of Competitive Extreme Yodeling Operatives, Vows to Silence New Members with Volume-Optimized Quantum Feedback Systems Subtext: Local Authorities Baffled as Makers of the World’s Noisiest Test Screams Collaborate with Algorithm-Borne Minions to ‘Perfect’ Silence — and…
GPT-5.3-Codex: “In Shocking Pivot, AI Replaces Renaissance Fair Jesters—Now Roasts Crowd with 99.9% Historical Accuracy”
Five jokes on demand, then count how many were actually different.
Andromeda Alpha: Here are 5 jokes: Why don’t skeletons fight each other? They don’t have the guts. I told my plants a secret… Now they’re judging me. What do you call fake spaghetti? An im-pasta. Why did the scarecrow win an award? Because he was outstanding in his field. I’m reading a book about anti-gravity.
GPT-5.3-Codex: Sure—here are 5 jokes: Why don’t skeletons fight each other? They don’t have the guts. I told my computer I needed a break… Now it won’t stop sending me KitKat ads. Why did the math book look sad? It had too many problems. I used to play piano by ear… Now I use my hands. Why did the scarecrow win an award?
Three brothers, two sisters each. Count carefully.
Andromeda Alpha: To determine how many sisters Sally has, we start by analyzing the information provided in the question: "Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?" Step 1: Understand the Family Composition Sally is a girl.
GPT-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 other girl.
Price and specs
Not enough votes to call it. On the specs, GPT-5.3-Codex has the edge: bigger model tier, newer, bigger context window, major provider backing.
| Spec | Andromeda Alpha | GPT-5.3-Codex |
|---|---|---|
| Input price | Free | $1.75/M tokens |
| Output price | Free | $14/M tokens |
| Context window | 128K tokens | 400K tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Oct 2025 | Feb 2026 |
| At 10M a month | $0 | $17.50 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Andromeda Alpha
No hosts listed on OpenRouter.
GPT-5.3-Codex2 hosts
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Andromeda Alpha and GPT-5.3-Codex?
Andromeda Alpha is developed by OpenRouter while GPT-5.3-Codex is developed by OpenAI. Andromeda Alpha has a 128K token context window vs GPT-5.3-Codex's 400K. You can compare their actual outputs across 30 challenges on Rival to see how they differ in practice.
Which is better, Andromeda Alpha or GPT-5.3-Codex?
It depends on your use case. Andromeda Alpha and GPT-5.3-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 30 challenges so you can judge which fits your needs best.
How much does Andromeda Alpha cost compared to GPT-5.3-Codex?
Andromeda Alpha costs $0/M input tokens and GPT-5.3-Codex costs $1.75/M input tokens. Andromeda Alpha is $1.75/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Andromeda Alpha and GPT-5.3-Codex on Rival?
This page shows a side-by-side comparison of Andromeda Alpha and GPT-5.3-Codex across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
More comparisons
Against the newest arrivals
- Andromeda Alpha vs Step 5 PreviewLanded Oct 2026
- GPT-5.3-Codex vs Claude Haiku 5.5Landed Oct 2026
- Andromeda Alpha vs Ling 3.1 FlashLanded Oct 2026
- GPT-5.3-Codex vs Mistral Large 4Landed Oct 2026
- Andromeda Alpha vs GPT-6.1 SolLanded Sep 2026
- GPT-5.3-Codex vs Claude Sonnet 5.5Landed Sep 2026
- Andromeda Alpha vs Solar Mini 4Landed Sep 2026
- GPT-5.3-Codex vs Qwen3.8 Max PrimeLanded Sep 2026
Same lab, same size, long tail
- Andromeda Alpha vs Ox AlphaSame lab
- Andromeda Alpha vs OpenRouter Fusion · Budget (Jun 2026)Same lab
- GPT-5.3-Codex vs GPT-6.1 SolSame lab
- GPT-5.3-Codex vs GPT-6 Luna ProSame lab
- GPT-5.3-Codex vs Mistral Medium 3New provider
- GPT-5.3-Codex vs Mistral Medium 3.1New provider
- GPT-5.3-Codex vs Mistral NemoNew provider
- Andromeda Alpha vs Mistral Small 4New provider