Updated Jan 27, 2026

Our Verdict

GPT-5 Codex

Solar Pro 3Runner-up

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

Too close to call

Writing DNA

Style Comparison

Similarity

96%

Solar Pro 3 uses 2.9x more bold

GPT-5 Codex

Solar Pro 3

64%Vocabulary50%

17wSentence Length21w

0.38Hedging0.42

2.3Bold6.5

3.5Lists2.2

0.15Emoji0.17

0.49Headings0.56

0.05Transitions0.12

Based on 13 + 18 text responses

vs

Ask them anything yourself

GPT-5 Codex

Solar Pro 3

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

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GPT-5 Codex vs MiniMax M2.5New provider

GPT-5 Codex vs Aurora AlphaNew provider

Solar Pro 3 vs Grok 3New provider

GPT-5 CodexvsSolar Pro 3

31 fights queued

Why GPT-5 Codex?

Dead even. This one's a coin flip.

Why Solar Pro 3?

4 months newerJan 2026

GPT-5 CodexSolar Pro 3

Input price

—

$0.000/M

Output price

—

$0.000/M

Context

—

128K

Released

Sep 2025

Jan 2026

Favorites

GPT-5 CodexSolar Pro 3

Movie

Blade Runner

Blade Runner

—

Album

Kind of Blue

—

City

Tokyo

—

Game

Minecraft

Minecraft

Action, Arcade4.4

—

12 / 31

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026text

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

Try this prompt

Vote

2 / 31

02

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026text

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

Try this prompt

Vote

3 / 31

03

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026text

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

Try this prompt

Vote

4 / 31

04

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026svg

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

Try this prompt

Vote

5 / 31

05

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026text

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

Try this prompt

Vote

6 / 31

06

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026text

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

Try this prompt

Vote

Sponsored

7 / 31

07

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026text

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

Try this prompt

Vote

8 / 31

08

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

Try this prompt

Vote

9 / 31

09

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

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

Try this prompt

Vote

10 / 31

10

Mario Level UI Recreationweb design

Recreate an interactive, classic Mario level 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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

Try this prompt

Vote

11 / 31

11

Framer-Style Animationweb design

Tests an AI's ability to create smooth web animations

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

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

Try this prompt

Vote

12 / 31

12

Dark Mode Dashboardweb design

Tests an AI's UI design skills with theming support

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

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

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

Try this prompt

Vote

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