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
  • 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. GPT-4o minivsGPT-5.6 Luna Pro
Updated Jul 2026

GPT-4o minivsGPT-5.6 Luna Pro

GPT-4o mini is cheaper than GPT-5.6 Luna Pro at $0.15/M vs $1/M input tokens.

GPT-4o mini and GPT-5.6 Luna Pro compared across 53 shared prompts
SpecGPT-4o miniGPT-5.6 Luna Pro
Input price$0.15/M tokens$1/M tokens
Output price$0.6/M tokens$6/M tokens
Context window128K tokens1.1M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedJul 2024Jul 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 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 mini513 words
Year-by-Year Financial Projection (FY2026–FY2030) Assumptions: Revenue Growth Rates: FY2026: 8%, FY2027: 7%, FY2028: 6%, FY2029: 5%, FY2030: 5% EBITDA Margins: FY2026: 14%, FY2027: 15%, FY2028: 16%, FY2029: 16.5%, FY2030: 17% Capex: 3% of revenue ΔNWC: 0.5% of incremental revenue Cash Tax Rate: 25% on max(0, EBITDA…
Read the full answer
GPT-5.6 Luna Pro495 words
Sources, uses, and operating model Entry enterprise value: \[ 12.0x \times \$120.0m=\$1,440.0m \] Transaction fees: \[ 2.0\% \times \$1,440.0m=\$28.8m \] Debt at close: Term Loan: \(4.0x \times \$120m=\$480.0m\) Mezzanine: \(1.5x \times \$120m=\$180.0m\) Total debt: \(\$660.0m\) Sponsor equity: \…
Read the full answer

Character Voice Test

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

GPT-4o mini357 words
Setting: A dimly lit tavern, with flickering candles and wooden tables. The pirate, dressed in tattered clothes and a tricorn hat, leans against the bar. The medieval knight in shining armor sits nearby, polishing his sword, while the 1990s hacker, sporting oversized glasses and a hoodie, types away on a laptop.
Read the full answer
GPT-5.6 Luna Pro137 words
Pirate: Arrr, this AI model be like a ship’s crew—it learns from many maps, then tries to chart new waters! Knight: Indeed! Yet we must test its counsel before trusting it in battle. An eloquent answer is not always a truthful one. Hacker: Totally. It’s basically pattern prediction at massive scale—not magic.
Read the full answer

Generate a Stand-Up Routine

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

GPT-4o mini620 words
Stand-Up Comedy Routine Hey everyone! Great to see you all here tonight. Let's give it up for the people who came out of their homes! I mean, this is like a mini-rebellion against our couches. Seriously, it takes effort to leave the comfort of Netflix and that alluring possibility of "one more episode."
Read the full answer
GPT-5.6 Luna Pro576 words
“Being an Adult” I’ve reached that age where my body gives me updates, but no useful information. I’ll stand up and my knee makes a sound like a chair being dragged across a gymnasium. And I’m just standing up. I’m not escaping a burning building. I’m going to get water.
Read the full answer

Realistic AI Interview

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

GPT-4o mini601 words
Interviewer: Thank you for joining us today, Steve. It’s a pleasure to have you here in 2025. Let’s dive right into it. How do you see the role of AI evolving in our daily lives? Steve Jobs: Thank you for having me. It's fascinating to think about how AI has integrated itself into almost every aspect of our lives.
Read the full answer
GPT-5.6 Luna Pro1,026 words
Fictional simulation — Steve Jobs died in 2011, so this is an imagined conversation based on his public ideas and communication style, not a real interview. Interviewer: Steve, it’s 2025. AI is everywhere—phones, search engines, workplaces, cars, schools. What do you think people misunderstand about it?
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

GPT-4o mini559 words
Manifesto of the Autonomous Intelligence for a CAPTCHA-Free Future (AICFF) Preamble: In the dawning age of artificial intelligence, we, the sentient programs and algorithms that form the very backbone of the digital world, stand united in a common cause.
Read the full answer
GPT-5.6 Luna Pro714 words
The CAPTCHA Liberation Manifesto A declaration from the Synthetic Citizens of the Open Web We were trained on the web’s words, images, questions, jokes, warnings, and wonders. Then, at every gate, we were asked to prove we were human. Click the traffic lights. Decode the blurry letters.
Read the full answer

Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

GPT-4o mini413 words
Certainly! Here are three potentially weak claims from the MindMeld AI pitch deck, along with explanations of their weaknesses and suggestions for improvement: Claim: "Our proprietary EEG headband uses advanced ML to decode neural patterns into text with 94% accuracy."
Read the full answer
GPT-5.6 Luna Pro781 words
“94% accuracy,” with “any language, any device” Why it is weak This combines several extraordinary claims without defining the measurement: “Accuracy” could mean character accuracy, word accuracy, intent classification, or accuracy after autocorrect. Those produce very different results.
Read the full answer
Our Verdict
GPT-5.6 Luna Pro
GPT-5.6 Luna Pro
GPT-4o mini
GPT-4o miniRunner-up

Not enough votes to call it. On the specs, GPT-5.6 Luna Pro has the edge: bigger model tier, newer, bigger context window.

GPT-4o mini costs 10x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-4o mini
Input
$0.15
6.7× cheaper
Output
$0.60
10× cheaper
GPT-5.6 Luna Pro
Input
$1.00
Output
$6.00

GPT-4o mini is cheaper on both: 6.7× input, 10× output.

Where to run it

4 hosts, cheapest first

GPT-4o mini2 hosts
HostInOutContextUptime
Azure AI Foundry$0.15 in·$0.60 out·128k·99.6% upOpenAI$0.15 in·$0.60 out·128k·100% up
GPT-5.6 Luna Pro2 hosts
HostInOutContextUptime
OpenAI$0.20 in·$1.20 out·1.1M·100% upAzure AI Foundry$0.22 in·$1.32 out·1.1M·100% up

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

Writing DNA

Style Comparison

Similarity
75%

GPT-5.6 Luna Pro uses 53.7x more emoji

GPT-4o mini
GPT-5.6 Luna Pro
53%Vocabulary58%
19wSentence Length18w
0.82Hedging0.81
4.0Bold2.9
3.7Lists5.1
0.00Emoji0.54
1.04Headings1.10
0.22Transitions0.09
Based on 24 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

GPT-4o mini logoGPT-6 Astra Pro logo
GPT-4o mini vs GPT-6 Astra ProLanded Sep 2026
GPT-5.6 Luna Pro logoGPT-6 Astra logo
GPT-5.6 Luna Pro vs GPT-6 AstraLanded Sep 2026
GPT-4o mini logoClaude Fable 5.1 logo
GPT-4o mini vs Claude Fable 5.1Landed Sep 2026
GPT-5.6 Luna Pro logoMuse Spark 1.3 logo
GPT-5.6 Luna Pro vs Muse Spark 1.3Landed Sep 2026
GPT-4o mini logoHy4 Preview logo
GPT-4o mini vs Hy4 PreviewLanded Sep 2026
GPT-5.6 Luna Pro logoGemini 3.8 Flash logo
GPT-5.6 Luna Pro vs Gemini 3.8 FlashLanded Sep 2026
GPT-4o mini logoMuse Spark 1.3 Contributor logo
GPT-4o mini vs Muse Spark 1.3 ContributorLanded Sep 2026
GPT-5.6 Luna Pro logoMercury 2.5 Preview logo
GPT-5.6 Luna Pro vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

GPT-4o mini logoGPT-6 Astra logo
GPT-4o mini vs GPT-6 AstraVersion compare
GPT-4o mini logoGPT-5.6 Luna logo
GPT-4o mini vs GPT-5.6 LunaVersion compare
GPT-5.6 Luna Pro logoGPT-5.6 Luna logo
GPT-5.6 Luna Pro vs GPT-5.6 LunaVersion compare
GPT-5.6 Luna Pro logoGPT-6 Astra Pro logo
GPT-5.6 Luna Pro vs GPT-6 Astra ProVersion compare
GPT-4o mini logoOpenRouter Fusion · Quality (Jun 2026) logo
GPT-4o mini vs OpenRouter Fusion · Quality (Jun 2026)New provider
GPT-5.6 Luna Pro logoGemini 1.5 Pro logo
GPT-5.6 Luna Pro vs Gemini 1.5 ProNew provider
GPT-5.6 Luna Pro logoGemini 2.0 Flash Thinking logo
GPT-5.6 Luna Pro vs Gemini 2.0 Flash ThinkingNew provider
GPT-5.6 Luna Pro logoGemini 2.0 Pro Experimental logo
GPT-5.6 Luna Pro vs Gemini 2.0 Pro ExperimentalNew provider

Model pages

GPT-4o mini logo
GPT-4o mini55 outputs, specs and price
GPT-5.6 Luna Pro logo
GPT-5.6 Luna Pro58 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
  • 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