Compare Gemini 2.5 Pro Experimental by Google AI against GPT-5.3-Codex by OpenAI, context windows of 1.0M vs 400K, tested across 42 shared challenges. Updated February 2026.
37 fights queued
Tests an AI's ability to understand game rules and strategy
Tests an AI's randomness and creativity
Sure—here are 5 jokes:
Why don’t skeletons fight each other?
They don’t have the guts.
I told my computer I needed a break…
Now it won’t stop sending me KitKat ads.
Why did the math book look sad?
It had too many problems.
I used to play piano by ear…
Now I use my hands.
Why did the scarecrow win an award?
Because he was outstanding in his field.
✅ How many are unique? 5 (all of them).
Tests an AI's ability to generate vector graphics
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Tests an AI's humor and creative writing ability
Tests an AI's ability to simulate personalities and predict future trends
Tests an AI's humor and understanding of current events
Tests an AI's ability to generate a complete, working landing page
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
Recreate an interactive, classic Mario level in a single HTML file.
Tests an AI's ability to replicate an existing UI with Tailwind CSS
Tests an AI's ability to create smooth web animations
25+ challenges you’re sleeping on
5 free credits on signup
By continuing, you agree to Rival's Terms of Service and Privacy Policy
