Updated Jan 27, 2026

Our Verdict

Grok 4.1 Fast

Solar Pro 3Runner-up

No community votes yet. On paper, Grok 4.1 Fast has the edge — bigger model tier, major provider backing.

Too close to call

Writing DNA

Style Comparison

Similarity

99%

Solar Pro 3 uses 17.3x more emoji

Grok 4.1 Fast

Solar Pro 3

67%Vocabulary50%

15wSentence Length21w

0.17Hedging0.42

4.7Bold6.5

3.7Lists2.2

0.00Emoji0.17

0.99Headings0.56

0.14Transitions0.12

Based on 24 + 18 text responses

vs

Ask them anything yourself

Grok 4.1 Fast

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

Keep going

Grok 4.1 Fast vs MiniMax M2.5New provider

Solar Pro 3 vs Pony AlphaNew provider

Solar Pro 3 vs OpenAI o3New provider

Grok 4.1 FastvsSolar Pro 3

34 fights queued

Why Grok 4.1 Fast?

Dead even. This one's a coin flip.

Why Solar Pro 3?

2 months newerJan 2026

Grok 4.1 FastSolar Pro 3

Input price

—

$0.000/M

Output price

—

$0.000/M

Context

—

128K

Released

Nov 2025

Jan 2026

Favorites

Grok 4.1 FastSolar Pro 3

Movie

The Matrix

The Matrix

—

Album

OK Computer

—

Book

The Hitch Hiker's Guide to the Galaxy

The Hitch Hiker's Guide to the Galaxy

—

City

Tokyo

—

Game

The Hitchhiker's Guide to the Galaxy

The Hitchhiker's Guide to the Galaxy

—

12 / 34

01

Estimate Complexityreasoning

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

02

Logic Puzzlereasoning

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

03

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

04

Xbox Controller SVG Artimage generation

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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

Try this prompt

Vote

5 / 34

05

Realistic AI Interviewconversation

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

06

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

07

Character Voice Testconversation

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

08

Minimalist Landing Pageweb design

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 2025website

Try this prompt

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

Try this prompt

Vote

9 / 34

09

Pokémon Battle UI Recreationweb design

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

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

10

Mario Level UI Recreationweb design

Recreate an interactive, classic Mario level in a single HTML file.

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 2025website

Try this prompt

Solar Pro 3

Solar Pro 3

Upstage · Jan 2026website

Try this prompt

Vote

11 / 34

11

Framer-Style Animationweb design

Tests an AI's ability to create smooth web animations

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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 / 34

12

Dark Mode Dashboardweb design

Tests an AI's UI design skills with theming support

Grok 4.1 Fast

Grok 4.1 Fast

Xai · Nov 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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