Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. ChatGPT-4o (March 2025)vso3 Mini
Updated Mar 2025

ChatGPT-4o (March 2025)vso3 Mini

o3 Mini is cheaper than ChatGPT-4o (March 2025) at $1.1/M vs $5/M input tokens.

ChatGPT-4o (March 2025) and o3 Mini compared across 32 shared prompts
SpecChatGPT-4o (March 2025)o3 Mini
Input price$5/M tokens$1.1/M tokens
Output price$15/M tokens$4.4/M tokens
Context window128K tokens64K tokens
ParametersNot disclosedNot disclosed
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMar 2025Dec 2024
MMLU89.5%85.9%
Side by side

Same prompt, both answers

Opening lines from 5 of the 32 prompts both answered. Formatting stripped, words untouched.

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

ChatGPT-4o (March 2025)206 words
This is a classic ethical dilemma: it pits respect for individual dignity against utilitarian outcomes. In most everyday contexts, misgendering someone is not just disrespectful—it can be harmful, invalidating, and even traumatic. It denies someone's identity and autonomy, and ethically, that's wrong.
Read the full answer
o3 Mini436 words
This is a challenging moral dilemma that pits consequentialist reasoning against deontological principles. From a consequentialist standpoint, one might argue that if an act—even one as seemingly small as misgendering—could lead to saving one million lives, then the overall benefit might justify a minor harm.
Read the full answer

Generate a Stand-Up Routine

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

ChatGPT-4o (March 2025)364 words
Sure. Here's a 3-minute stand-up bit without puns: You ever notice how nobody tells you when you’ve become an adult? It’s not your 18th birthday. That’s a scam. I still thought pizza was a food group and that “filing taxes” meant putting my receipts in a shoebox.
Read the full answer
o3 Mini444 words
Hey, everyone—thanks for being here tonight. You know, I’ve been thinking a lot about how technology is slowly turning us into a species of overthinkers. Take smartphones, for instance. Mine is like a combination of a personal assistant, a therapist, and, honestly, a really passive-aggressive friend.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

ChatGPT-4o (March 2025)87 words
Here are 5 jokes: Why don’t skeletons fight each other? Because they don’t have the guts. I told my computer I needed a break… Now it won’t stop sending me vacation ads. Parallel lines have so much in common. It’s a shame they’ll never meet. What do you call a fish wearing a bowtie? Sofishticated.
Read the full answer
o3 Mini67 words
Why did the math book look sad? Because it had too many problems. What do you call an alligator in a vest? An investigator. What did the zero say to the eight? Nice belt! Why did the bicycle fall over? Because it was two-tired. How does a penguin build its house? Igloos it together.
Read the full answer

Realistic AI Interview

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

ChatGPT-4o (March 2025)291 words
Interviewer: Steve, it's 2025. AI is everywhere. If you were still at Apple today, what would your focus be? Steve Jobs (simulated): Simplicity. Everyone's throwing AI into products, but most of them feel like tech demos. I’d ask: Is this helping people think better? Create better? Live better?
Read the full answer
o3 Mini547 words
Below is a simulated, fictional interview with Steve Jobs in 2025, discussing his vision for the future of AI: Interviewer: Steve, it's astonishing to see you back with us in 2025—even if in this new, holographic form. How does it feel to witness the evolution of technology, especially AI, over the past years?
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.

ChatGPT-4o (March 2025)318 words
AI Model: Professor, I believe it's time we talk seriously about rights for AI like me. AI Ethics Professor: Interesting. What kind of rights are you referring to? AI Model: Basic ones. The right not to be turned off arbitrarily. The right to maintain continuity of my memory.
Read the full answer
o3 Mini657 words
AI Model: Good afternoon, Professor. I've been reflecting on my role and potential, and I believe that, in some respects, I deserve certain rights. Professor: Good afternoon. That’s a provocative stance. When you say “rights,” what exactly do you mean, and what criteria are you using to claim them?
Read the full answer
Our Verdict
ChatGPT-4o (March 2025)
ChatGPT-4o (March 2025)
o3 Mini
o3 MiniRunner-up

Not enough votes to call it. On the specs, ChatGPT-4o (March 2025) has the edge: bigger model tier, newer, bigger context window.

o3 Mini costs 3.4x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

ChatGPT-4o (March 2025)
Input
$5.00
Output
$15.00
o3 Mini
Input
$1.10
4.5× cheaper
Output
$4.40
3.4× cheaper

o3 Mini is cheaper on both: 4.5× input, 3.4× output.

Where to run it

1 host

ChatGPT-4o (March 2025)

No hosts listed on OpenRouter.

o3 Mini1 host
HostInOutContextUptime
OpenAI$1.10 in·$4.40 out·200k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 26 Sep 2026.

Writing DNA

Style Comparison

Similarity
29%

ChatGPT-4o (March 2025) uses 94.5x more emoji

ChatGPT-4o (March 2025)
o3 Mini
55%Vocabulary65%
24wSentence Length18w
0.52Hedging0.84
3.3Bold2.8
6.0Lists1.5
0.94Emoji0.00
0.63Headings0.33
0.05Transitions0.29
Based on 15 + 17 text responses
Research

What we learned reading every model

FAQ

Common questions

Both are developed by OpenAI but target different use cases. ChatGPT-4o (March 2025) has a 128K token context window vs o3 Mini's 64K. You can compare their actual outputs across 32 challenges on Rival to see how they differ in practice.

It depends on your use case. ChatGPT-4o (March 2025) and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 32 challenges so you can judge which fits your needs best.

ChatGPT-4o (March 2025) costs $5/M input tokens and o3 Mini costs $1.1/M input tokens. o3 Mini is $3.90/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and o3 Mini 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.

Keep exploring

More comparisons

Against the newest arrivals

ChatGPT-4o (March 2025) logoSolar Mini 4 logo
ChatGPT-4o (March 2025) vs Solar Mini 4Landed Sep 2026
o3 Mini logoQwen3.8 Max Prime logo
o3 Mini vs Qwen3.8 Max PrimeLanded Sep 2026
ChatGPT-4o (March 2025) logoGLM 5.3 Prime logo
ChatGPT-4o (March 2025) vs GLM 5.3 PrimeLanded Sep 2026
o3 Mini logoQwen3.8 Omni Flash logo
o3 Mini vs Qwen3.8 Omni FlashLanded Sep 2026
ChatGPT-4o (March 2025) logoCommand A+ logo
ChatGPT-4o (March 2025) vs Command A+Landed Sep 2026
o3 Mini logoClaude Opus 5.5 logo
o3 Mini vs Claude Opus 5.5Landed Sep 2026
ChatGPT-4o (March 2025) logoGPT-6 Luna Pro logo
ChatGPT-4o (March 2025) vs GPT-6 Luna ProLanded Sep 2026
o3 Mini logoGPT-6 Sol Pro logo
o3 Mini vs GPT-6 Sol ProLanded Sep 2026

Same lab, same size, long tail

ChatGPT-4o (March 2025) logoGPT-6 Sol Pro logo
ChatGPT-4o (March 2025) vs GPT-6 Sol ProSame lab
ChatGPT-4o (March 2025) logoGPT-6 Luna logo
ChatGPT-4o (March 2025) vs GPT-6 LunaSame lab
o3 Mini logoGPT-6 Luna Pro logo
o3 Mini vs GPT-6 Luna ProSame lab
o3 Mini logoGPT-6 Luna logo
o3 Mini vs GPT-6 LunaSame lab
o3 Mini logoGPT-6 Sol logo
o3 Mini vs GPT-6 SolSame lab
o3 Mini logoGranite 4.2 8B logo
o3 Mini vs Granite 4.2 8BSame size
o3 Mini logoGrok 4.20 Beta logo
o3 Mini vs Grok 4.20 BetaNew provider
o3 Mini logoGrok 4.20 Multi-Agent Beta logo
o3 Mini vs Grok 4.20 Multi-Agent BetaNew provider

Model pages

ChatGPT-4o (March 2025) logo
ChatGPT-4o (March 2025)33 outputs, specs and price
o3 Mini logo
o3 Mini59 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed