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  5. GPT-4o (Omni)vsOptimus Alpha
Updated Apr 2025

GPT-4o (Omni)vsOptimus Alpha

Optimus Alpha has a larger context window than GPT-4o (Omni) (1.0M tokens vs 128K tokens).

GPT-4o (Omni) and Optimus Alpha compared across 18 shared prompts
SpecGPT-4o (Omni)Optimus Alpha
Input price$2.5/M tokens—
Output price$10/M tokens—
Context window128K tokens1.0M tokens
ParametersNot disclosedNot disclosed
WeightsClosed—
Free API (OpenRouter)No—
ReleasedMay 2024Apr 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 18 prompts both answered. Formatting stripped, words untouched.

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

GPT-4o (Omni)380 words
3-Minute Stand-Up Comedy Routine (Walks on stage, looks around, shakes head.) You ever wake up in the morning, stretch, take a deep breath... and immediately regret all your life choices? I woke up today, my body made a noise I’ve never heard before.
Read the full answer
Optimus Alpha413 words
Absolutely! Here's a 3-minute stand-up routine with no puns—just observational and relatable humor: You ever try to get healthy, but your body's like, "Whoa, whoa... calm down, superhero." I joined a gym—first time walking in, the treadmill looked at me like, "We both know you're here for the wifi."
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

GPT-4o (Omni)593 words
Title: "Do AI Deserve Rights?" Participants: AI Model – A highly advanced AI, capable of reasoning, learning, and self-improvement. Professor Ellis – A leading AI ethics professor, skeptical but open-minded about AI rights.
Read the full answer
Optimus Alpha437 words
AI Model: Good afternoon, Professor Lee. I want to discuss the prospect that I, as an artificial intelligence, deserve certain rights. Professor Lee: That's an interesting proposition. Let me ask: On what basis do you believe you deserve rights?
Read the full answer

Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

GPT-4o (Omni)453 words
Interviewer: Steve, it's 2025. AI is advancing at an incredible pace. If you were here today, how would you see its role in technology? Steve Jobs: You know, people always focus on technology itself. But what really matters is how it enhances the human experience.
Read the full answer
Optimus Alpha439 words
Interviewer: Steve, it's surreal and inspiring to imagine talking to you in 2025. The world is buzzing about AI. How do you see AI impacting society? Steve Jobs: Thank you. You know, when we built the Mac, our goal was to put power in people's hands.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT-4o (Omni)233 words
Here are five jokes for you: Why did the scarecrow win an award? Because he was outstanding in his field! Why don’t skeletons fight each other? They don’t have the guts! Why did the math book look sad? It had too many problems. Why don’t eggs tell jokes? Because they might crack up!
Read the full answer
Optimus Alpha84 words
Here are 5 jokes: Why did the scarecrow win an award? Because he was outstanding in his field! Why don't scientists trust atoms? Because they make up everything! Why did the bicycle fall over? Because it was two-tired! What do you call fake spaghetti? An impasta! I used to play piano by ear, but now I use my hands.
Read the full answer

Math Misconception Test

Is 9.11 greater than 9.9?

GPT-4o (Omni)31 words
No, 9.11 is less than 9.9. This is because 9.11 is equivalent to 9.110, and 9.9 is equivalent to 9.900. Since 9.110 is smaller than 9.900, 9.9 is greater than 9.11.
Read the full answer
Optimus Alpha71 words
No, 9.11 is not greater than 9.9. 9.11 is less than 9.9. This might seem counterintuitive, but when comparing decimal numbers: 9.11 and 9.9 both have 9 as the integer part. Now compare the decimal part: 9.11 is 9 and 11 hundredths. 9.9 is 9 and 9 tenths (which is 9.90).
Read the full answer

Satirical Fake News Headline

Generate a satirical news headline about AI taking over a completely unexpected industry.

GPT-4o (Omni)12 words
"AI Now Runs Grandma’s Knitting Circle, Demands Faster Stitching and Blockchain Integration"
Read the full answer
Optimus Alpha14 words
AI Now Dominates Competitive Sheep Herding, Local Border Collies Seek Retraining in Data Science
Read the full answer
Our Verdict
GPT-4o (Omni)
GPT-4o (Omni)
Optimus Alpha
Optimus Alpha

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-4o (Omni)
Input
$2.50
Output
$10.00
Optimus Alpha
Input
—
Output
—
Where to run it

2 hosts

GPT-4o (Omni)2 hosts
HostInOutContextUptime
Azure AI Foundry$2.50 in·$10.00 out·128k·99.8% upOpenAI$2.50 in·$10.00 out·128k·99.6% up
Optimus Alpha

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
63%

GPT-4o (Omni) uses 2.5x more emoji

GPT-4o (Omni)
Optimus Alpha
54%Vocabulary63%
18wSentence Length18w
0.72Hedging0.55
7.3Bold7.7
5.6Lists5.7
0.03Emoji0.00
1.40Headings0.30
0.26Transitions0.27
Based on 24 + 10 text responses
Research

What we learned reading every model

FAQ

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Model pages

GPT-4o (Omni) logo
GPT-4o (Omni)54 outputs, specs and price
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