Updated Mar 12, 2026

Our Verdict

GPT-5 Codex

Grok 4.20 Multi-Agent Beta

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

These are our prompts. Yours will tell you more.

Run GPT-5 Codex vs Grok 4.20 Multi-Agent Beta on your actual task. 5 free credits. No card.

Test with your prompt

FAQ

Keep going

GPT-5 Codex vs Claude Opus 4.1New provider

GPT-5 Codex vs MiniMax M2.5New provider

GPT-5 Codex vs Pony AlphaNew provider

This comparison gets 800+ views/month. Your brand could be here.

GPT-5 CodexvsGrok 4.20 Multi-Agent Beta

44 fights queued

Why GPT-5 Codex?

Dead even. This one's a coin flip.

Why Grok 4.20 Multi-Agent Beta?

6 months newerMar 2026

Favorites

GPT-5 CodexGrok 4.20 Multi-Agent Beta

Movie

Blade Runner

Blade Runner

The Matrix

The Matrix

Album

Kind of Blue

OK Computer

Book

—

Dune

Dune

City

Tokyo

Paris

Game

Minecraft

Minecraft

Action, Arcade4.4

Portal 2

Portal 2

Shooter, Puzzle4.6

12 / 44

01

Estimate Complexityreasoning

Tests an AI's ability to make educated estimates based on technical knowledge

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

2 / 44

02

AI Board Game Logicreasoning

Tests an AI's ability to understand game rules and strategy

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

3 / 44

03

Logic Puzzlereasoning

Tests an AI's ability to solve a simple but potentially confusing logic puzzle

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

4 / 44

04

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

5 / 44

05

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

6 / 44

06

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

7 / 44

07

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

8 / 44

08

Realistic AI Interviewconversation

Tests an AI's ability to simulate personalities and predict future trends

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

Which one handles your task better?

Paste your actual prompt. Same models, your work. 30 seconds.

Try your prompt

9 / 44

09

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

10 / 44

10

Character Voice Testconversation

Tests an AI's ability to write in distinct character voices

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

11 / 44

11

Minimalist Landing Pageweb design

Tests an AI's ability to generate a complete, working landing page

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025website

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026website

Try this prompt

Vote

12 / 44

12

Pokémon Battle UI Recreationweb design

Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.

GPT-5 Codex

GPT-5 Codex

Openai · Sep 2025website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta

Xai · Mar 2026website

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

See the full comparison

32+ head-to-head challenges below. Free account, no card.

Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy

Find Your Model

Static demos are useful. Your prompt matters more.

Run this matchup on your actual task. 30 seconds. No card.

Can you tell Claude from GPT?

Run your prompt blind. Judge outputs, not logos.

Take the blind test