Updated Sep 23, 2025

Our Verdict

GPT-5 Codex

Qwen3 CoderRunner-up

No community votes yet. On paper, GPT-5 Codex has the edge — newer, major provider backing.

Too close to call

Writing DNA

Style Comparison

Similarity

93%

Qwen3 Coder uses 4.2x more sentence length

GPT-5 Codex

Qwen3 Coder

64%Vocabulary61%

17wSentence Length72w

0.38Hedging0.61

2.3Bold4.7

3.5Lists5.6

0.15Emoji0.12

0.49Headings1.43

0.05Transitions0.20

Based on 13 + 22 text responses

vs

Ask them anything yourself

GPT-5 Codex

Qwen3 Coder

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026

Free preview13 of 58 slides

Download the free preview or get all 58 slides for $49

FAQ

Common questions

Keep going

GPT-5 Codex vs Pony AlphaNew provider

Qwen3 Coder vs Grok 3New provider

Qwen3 Coder vs Llama 4 MaverickNew provider

GPT-5 CodexvsQwen3 Coder

37 fights queued

Why GPT-5 Codex?

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified74.5% vs 69.6%

2 months newerSep 2025

Why Qwen3 Coder?

Dead even. This one's a coin flip.

GPT-5 CodexQwen3 Coder

Input price

—

$0.22/M

Output price

—

$0.95/M

Released

Sep 2025

Jul 2025

Benchmarks1 common

SWE-bench Verified

74.5%+6.6%

69.6%

Favorites

GPT-5 CodexQwen3 Coder

Movie

Blade Runner

Blade Runner

The Shawshank Redemption

The Shawshank Redemption

Album

Kind of Blue

Kind of Blue

Book

—

The Left Hand of Darkness

The Left Hand of Darkness

Ursula K. Le Guin

City

Tokyo

Kyoto

Game

Minecraft

Minecraft

Action, Arcade4.4

The Stanley Parable

The Stanley Parable

Indie, Adventure4.4

12 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

2 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025svg

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

Try this prompt

Vote

3 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

4 / 37

04

Math Misconception Testreasoning

Tests an AI's understanding of number representation

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

5 / 37

05

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

6 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025svg

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

Try this prompt

Vote

Sponsored

7 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

8 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

9 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

10 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025text

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

Try this prompt

Vote

11 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025website

Try this prompt

Vote

12 / 37

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

Qwen3 Coder

Qwen3 Coder

Qwen · Jul 2025website

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

Try this prompt

Vote

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