ChatGPT vs Gemini Comparison: 6 Tests Reveal a Shocking Winner
Julian Goldie
I Help Websites Get More Leads, Traffic and Sales with SEO | 💪 DM me "SEO" to get 200+ AI SEO Prompts!
I was ready to spend hundreds on ChatGPT o3. Then I tested it against Gemini 2.5 Pro...and threw away my credit card.
Watch the video tutorial below.
What I found wasn't just surprising—it was jaw-dropping. One AI completely dominated the other in EVERY test I ran.
In this ChatGPT vs Gemini comparison, I'm sharing exactly what happened when I pitted these two top AI models against each other in real-world tests that matter for business.
The ChatGPT vs Gemini Matchup: David vs Goliath?
OpenAI just released their most powerful model ever (ChatGPT o3) on April 16th. Google's Gemini 2.5 Pro has been available since March 25th.
Before my ChatGPT vs Gemini testing, the internet was buzzing that Gemini was the "GOAT of coding," but I needed to see for myself.
What makes this ChatGPT vs Gemini comparison especially interesting? The price difference is staggering:
- ChatGPT o3: $10 per million input tokens
- Gemini 2.5 Pro: $1 per million input tokens
That's right—Gemini costs 10X LESS than ChatGPT.
But does cheaper mean worse? Let's find out in this definitive ChatGPT vs Gemini showdown.
And that knowledge cutoff? Gemini's data is nearly 2 years fresher.
Test #1: Soccer Game Simulation
For my first ChatGPT vs Gemini test, I asked both to create a self-playing soccer simulation game.
ChatGPT o3 Results: The game was fundamentally broken. There were no goal nets on one side, and the red team completely disappeared during play, leaving only blue players moving around aimlessly.
Gemini 2.5 Pro Results: A fully functional soccer simulation with two complete teams competing properly. The movements were somewhat blocky, but the game worked correctly from start to finish.
ChatGPT vs Gemini Winner: Gemini 2.5 Pro (by a landslide)
Test #2: 3D Car Simulator
For the second ChatGPT vs Gemini test, I challenged both to create a 3D car simulator.
ChatGPT o3 Results: Complete failure. The code generated nothing but a blue screen—no car, no simulation, nothing usable.
Gemini 2.5 Pro Results: A functional 3D environment with a drivable car and even a little train circling the landscape! The graphics were decent, controls worked, and the entire experience was created from a single prompt.
ChatGPT vs Gemini Winner: Gemini 2.5 Pro (total domination)
Test #3: High-Converting Landing Page
For this ChatGPT vs Gemini challenge, I asked both AIs to research my SEO agency and create a high-converting landing page.
ChatGPT o3 Results: A basic, generic-looking page with seemingly fabricated testimonials. The design was subpar, and the content lacked depth—not something I'd ever consider publishing.
Gemini 2.5 Pro Results: A much more comprehensive page with better design elements, real case studies pulled from my actual work, and substantially more content. The writing sounded more natural and less AI-generated.
ChatGPT vs Gemini Winner: Gemini 2.5 Pro
Test #4: Snow Day Calculator
This ChatGPT vs Gemini test involved creating a functional snow day probability calculator.
ChatGPT o3 Results: The calculator looked decent but was non-functional—the "Calculate" button didn't work. The content was very robotic with no personality.
Gemini 2.5 Pro Results: A fully functional calculator with nice design touches like icons. The copy was engaging with human-like phrases such as "Get the sleds ready! A snow day is looking very likely!"
ChatGPT vs Gemini Winner: Gemini 2.5 Pro (functionality + personality)
Test #5: Five-Page Website Creation
This ChatGPT vs Gemini challenge asked both AIs to create a complete five-page website for my SEO agency.
ChatGPT o3 Results: This revealed a major problem—I couldn't even run the test. The API wasn't working without business verification, and I encountered multiple errors using different approaches.
Gemini 2.5 Pro Results: While not amazing (I'd rate it 5/10), it successfully created a functional five-page website that worked and navigated correctly. For a one-shot prompt, it was usable.
ChatGPT vs Gemini Winner: Gemini 2.5 Pro (by default)
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Test #6: Retro Synth Keyboard
For the final ChatGPT vs Gemini test, I challenged both to build a retro synthesizer keyboard in HTML.
ChatGPT o3 Results: Created a functional keyboard that produced sounds, but the interface was small with wasted space, and it lacked volume controls or waveform options.
Gemini 2.5 Pro Results: A full-featured synthesizer with volume control, waveform selection options, and a more visually appealing keyboard layout.
ChatGPT vs Gemini Winner: Gemini 2.5 Pro
ChatGPT vs Gemini: The Shocking Final Score
Gemini 2.5 Pro: 6 ChatGPT o3: 0
I've never seen such a one-sided ChatGPT vs Gemini comparison. Gemini 2.5 Pro won EVERY SINGLE TEST—often by a huge margin.
Remember: it costs 10X less per token than ChatGPT o3.
Where ChatGPT Still Shines
There is one area where this ChatGPT vs Gemini comparison doesn't tell the whole story: personal coaching.
If you use AI for journaling, reflection, or getting personalized advice based on your conversation history, ChatGPT o3 excels. For self-coaching scenarios, it feels almost AGI-level in its ability to provide meaningful guidance.
But for creating, coding, and building? This ChatGPT vs Gemini battle has a clear victor.
Quality Control: The Secret to Success with Either AI
No matter which AI you choose in this ChatGPT vs Gemini debate, quality control remains essential. Always review outputs for:
- Factual accuracy
- Code functionality
- Design coherence
- Logical flow
- Brand alignment
Even the winning AI in this ChatGPT vs Gemini test isn't perfect. Human oversight makes all the difference.
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FAQ About This ChatGPT vs Gemini Comparison
Is this ChatGPT vs Gemini comparison fair? Yes. I used identical prompts for both models, testing them side-by-side with the same challenges.
Will the ChatGPT vs Gemini landscape change soon? Absolutely. AI models improve rapidly, and OpenAI will likely respond to these results.
Is Gemini 2.5 Pro really better at coding? Based on my ChatGPT vs Gemini testing, yes. Gemini consistently produced functional, higher-quality code across multiple types of projects.
Can I use Gemini 2.5 Pro for free? Yes, unlike ChatGPT which requires a subscription for their latest models, you can use Gemini 2.5 Pro for free through Google's basic offering.
If you're serious about using AI to scale your business, the AI Profit Boardroom is where I share all my best systems and strategies. Join our community of 670+ members focused on practical AI implementation.
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2moFully agree