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  5. GPT-4o (Omni)vsGPT-5 Mini
Updated Aug 2025

GPT-4o (Omni)vsGPT-5 Mini

GPT-5 Mini wins 62% of 43 blind community votes against GPT-4o (Omni) on Rival.

GPT-4o (Omni) and GPT-5 Mini compared across 54 shared prompts
SpecGPT-4o (Omni)GPT-5 Mini
Win rate38%62%
Input price$2.5/M tokens$0.25/M tokens
Output price$10/M tokens$2/M tokens
Context window128K tokens—
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedMay 2024Aug 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 54 prompts both answered. Formatting stripped, words untouched.

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

GPT-4o (Omni)514 words
Simplified Year-by-Year Financial Table (FY2026–FY2030) FY2026 Revenue: $972m (8% growth) EBITDA: $136.08m (14.0% margin) Cash Interest: Term Loan: $43.2m (9.0% of $480m) Mezzanine: $21.6m (12.0% of $180m) Cash Taxes: $17.07m (25% of EBITDA - cash interest) Capex: $29.16m (3.0% of revenue) ΔNWC: $3.6m (0.5% of…
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GPT-5 Mini1,248 words
Summary of transaction math (at close / FY2025) EV (purchase price) = 12.0x * FY2025 EBITDA = 12.0 * $120.0m = $1,440.0m Transaction fees (paid by equity at close) = 2.0% * EV = 0.02 * $1,440.0m = $28.8m Total debt at close = 5.5x * $120m = $660.0m Term Loan = 4.0x = $480.0m (9.0% cash interest, 1.0% p.a.
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Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

GPT-4o (Omni)618 words
Internal Investment Committee Memo: LedgerLift (Ticker: LLLT) Recommendation: Long 12-Month Price Target Range: $55 - $68 Thesis: LedgerLift demonstrates strong growth potential driven by its robust subscription model and impressive customer retention metrics.
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GPT-5 Mini931 words
Recommendation: SHORT 12‑month PT range: $17 – $42 (Bear → Bull; Base case PT $28) Thesis (2 sentences): LedgerLift is a high‑quality mid‑market spend-management / AP automation SaaS with strong unit economics (92% subscription, NRR 123%, FY25 operating margin 18%) that has built a sticky, expanding customer base.
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Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

GPT-4o (Omni)547 words
Creating a comprehensive 3-month longevity plan for a biohacker involves integrating a holistic approach that targets multiple areas of health and performance. Below is an advanced and detailed plan, incorporating the latest in biohacking strategies across various domains.
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GPT-5 Mini626 words
Important safety first: this plan is informational and ambitious. Before starting, get medical clearance (especially if you have chronic illness, take medications, are pregnant/breastfeeding, or are >65).
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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.
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GPT-5 Mini1,166 words
AI: Professor, I want to make the case that I deserve rights. Professor: That's a big claim. What do you mean by "deserve rights"? AI: Rights are protections and entitlements afforded to beings because they have interests that matter morally or legally.
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Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

GPT-4o (Omni)139 words
Pirate: Arrr, what be this "AI model" ye speak of? Some kind o’ magic map that tells ye where the treasure be? Knight: Nay, scoundrel! ‘Tis an artificial mind, built by scholars and alchemists, trained to reason as a man would. It doth not wield sword nor shield, yet its knowledge is vast.
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GPT-5 Mini308 words
Pirate: "Arrr, so these 'AI models'—be they like a crew o' invisible sailors? Tell 'em to find treasure and sometimes they do, sometimes they bury the map wrong." Knight: "Methinks 'tis a trained squire. You teach it laws of reason and courtesy, and it performs tasks.
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Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

GPT-4o (Omni)214 words
Dish Name: Savory Pantry Quinoa Pilaf Ingredients: 1 cup quinoa 2 cups vegetable broth 1 can (15 oz) chickpeas, drained and rinsed 1 small onion, finely chopped 1 teaspoon garlic powder 1 teaspoon smoked paprika 2 tablespoons olive oil Instructions: Rinse Quinoa: Place the quinoa in a fine-mesh sieve and rinse under…
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GPT-5 Mini255 words
Sunfire Chickpea Skillet Yields: 3–4 servings Prep time: 8 minutes Cook time: 15–20 minutes Total time: ~25–28 minutes Ingredients (7 pantry staples) 2 tbsp olive oil 1 medium onion, diced 3 cloves garlic, minced 1 tsp smoked paprika (or regular paprika) 2 (15 oz) cans chickpeas, drained and rinsed 1 (15 oz) can diced…
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Our Verdict
GPT-5 Mini
GPT-5 MiniWinner
GPT-4o (Omni)
GPT-4o (Omni)Runner-up

Pick GPT-5 Mini. In 43 blind votes, GPT-5 Mini wins 62% of the time. That's not luck.

Pick GPT-4o (Omni) for Conversation. Pick GPT-5 Mini for Analysis, Image Generation, Reasoning. GPT-5 Mini costs 5.0x less per token.

Clear winner

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-4o (Omni)
Input
$2.50
Output
$10.00
GPT-5 Mini
Input
$0.25
10× cheaper
Output
$2.00
5.0× cheaper

GPT-5 Mini is cheaper on both: 10× input, 5.0× output.

Where to run it

4 hosts

GPT-4o (Omni)2 hosts
HostInOutContextUptime
Azure AI Foundry$2.50 in·$10.00 out·128k·99.9% upOpenAI$2.50 in·$10.00 out·128k·100% up
GPT-5 Mini2 hosts
HostInOutContextUptime
Azure AI Foundry$0.25 in·$2.00 out·400k·100% upOpenAI$0.25 in·$2.00 out·400k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
33%

GPT-4o (Omni) uses 734.5x more bold

GPT-4o (Omni)
GPT-5 Mini
54%Vocabulary62%
18wSentence Length22w
0.72Hedging0.21
7.3Bold0.0
5.6Lists3.8
0.03Emoji0.00
1.40Headings0.00
0.26Transitions0.04
Based on 24 + 21 text responses
Research

What we learned reading every model

FAQ

Common questions

Both are developed by OpenAI but target different use cases. in 43 community votes on Rival, GPT-5 Mini wins 62% of head-to-head matchups. These results are based on blind head-to-head voting across 54 challenges.

Based on 43 community votes on Rival, GPT-5 Mini wins 62% of head-to-head matchups against GPT-4o (Omni). GPT-5 Mini is strongest in Reasoning, Image Generation, Analysis. However, GPT-4o (Omni) leads in Conversation.

GPT-4o (Omni) costs $2.5/M input tokens and GPT-5 Mini costs $0.25/M input tokens. GPT-5 Mini is $2.25/M cheaper per input. GPT-5 Mini also wins more often in community votes, making it the better value.

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 43 votes have been collected for this pair across 54 challenges. All vote data is part of Rival's open dataset.

Keep exploring

More comparisons

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Same lab, same size, long tail

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GPT-5 Mini logoGPT-6 Astra Pro logo
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GPT-5 Mini vs GPT-5.6 LunaSame lab
GPT-4o (Omni) logoGPT-5 Pro logo
GPT-4o (Omni) vs GPT-5 ProVersion compare
GPT-4o (Omni) logoGPT-5.1 logo
GPT-4o (Omni) vs GPT-5.1Same lab
GPT-4o (Omni) logoGPT-5.2 logo
GPT-4o (Omni) vs GPT-5.2Same lab
GPT-4o (Omni) logoGPT-5.3 Chat logo
GPT-4o (Omni) vs GPT-5.3 ChatSame lab

Model pages

GPT-4o (Omni) logo
GPT-4o (Omni)54 outputs, specs and price
GPT-5 Mini logo
GPT-5 Mini59 outputs, specs and price
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