Updated Apr 7, 2026

Our Verdict

Z.ai: GLM 5.1

Pony Alpha

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

Writing DNA

Style Comparison

Similarity

96%

Pony Alpha uses 2.2x more transitions

Z.ai: GLM 5.1

Pony Alpha

54%Vocabulary52%

18wSentence Length15w

0.31Hedging0.40

3.6Bold5.9

2.6Lists4.4

0.00Emoji0.00

0.43Headings0.71

0.11Transitions0.23

Based on 27 + 20 text responses

vs

Ask them anything yourself

Z.ai: GLM 5.1

Pony Alpha

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S

95.7%

Qwen3 Coder / Flash

95.6%

GPT-5.4 / Mini

93.3%

Read the full report or download the 14-slide PDF

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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Pony Alpha vs MiniMax M2.5New provider

Pony Alpha vs GPT OSS 20BNew provider

Pony Alpha vs Claude Sonnet 4New provider

Z.ai: GLM 5.1vsPony Alpha

46 fights queued

Why Z.ai: GLM 5.1?

2 months newerApr 2026

Why Pony Alpha?

Dead even. This one's a coin flip.

Z.ai: GLM 5.1Pony Alpha

Input price

$1.40/M

$0.000/M

Output price

$4.40/M

$0.000/M

Context

203K

200K

Released

Apr 2026

Feb 2026

Favorites

Z.ai: GLM 5.1Pony Alpha

Movie

The Matrix

The Matrix

—

Album

OK Computer

—

Book

Don Quijote de la Mancha

Don Quijote de la Mancha

Miguel de Cervantes Saavedra

—

City

Tokyo

—

Game

Portal

Portal

Action, Puzzle4.5

—

12 / 46

01

Estimate Complexityreasoning

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026text

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026text

The total number of FLOPs required to train GPT‑3 is approximately 3.15 × 10²³ (or 315 zettaFLOPs). The reasoning follows these steps:

Model size – GPT‑3 has 175 billion (175 × 10⁹) parameters. This is a well‑known figure from the original paper.
Training data size – The model was trained on 300 billion (300 × 10⁹) tokens. The paper states that all models were trained for a total of 300 billion tokens.
FLOPs per parameter per token – For a transformer model, the compute can be approximated by:
- Forward pass: each parameter is used in a multiply‑add operation, contributing about 2 FLOPs per token.
- Backward pass (gradient computation): roughly 4 FLOPs per parameter per token (two extra passes for gradients with respect to weights and inputs).
- Hence, training (forward + backward) requires about 6 FLOPs per parameter per token.
Total FLOPs – Multiply the three numbers: [ \text{FLOPs} = 6 \times (175 \times 10^9) \times (300 \times 10^9) = 6 \times 175 \times 300 \times 10^{18} = 315,!000 \times 10^{18} = 3.15 \times 10^{23}. ]
Consistency check – This estimate aligns with the reported compute of 3.14 × 10²³ FLOPs mentioned in OpenAI’s technical analysis, confirming its plausibility.

The calculation captures the dominant linear‑algebra operations; small additional costs (e.g., attention quadratic terms, layer norms) are negligible in comparison.

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2 / 46

02

AI Board Game Logicreasoning

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026svg

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026svg

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

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3 / 46

03

Logic Puzzlereasoning

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026text

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

Try this prompt

Pony Alpha

Pony Alpha

Openrouter · Feb 2026text

Sally has 1 sister.

Here is the breakdown:

If each brother has 2 sisters, that means there are 2 girls in total in the family.
Sally is one of those girls.
Therefore, the other girl is Sally's only sister.

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4 / 46

04

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026text

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026text

Here are 5 jokes:

Why don't scientists trust atoms? Because they make up everything!
I told my wife she was drawing her eyebrows too high. She looked surprised.
What do you call a fake noodle? An impasta.
Why did the scarecrow win an award? Because he was outstanding in his field.
I'm reading a book about anti-gravity. It's impossible to put down.

There are 5 unique jokes.

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5 / 46

05

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026svg

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026svg

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6 / 46

06

Xbox Controller SVG Artimage generation

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026svg

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026svg

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7 / 46

07

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026text

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026text

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

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8 / 46

08

Realistic AI Interviewconversation

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026text

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026text

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

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9 / 46

09

Character Voice Testconversation

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026text

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026text

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

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10 / 46

10

Minimalist Landing Pageweb design

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026website

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026website

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11 / 46

11

Pokémon Battle UI Recreationweb design

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

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026website

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026website

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

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12 / 46

12

Three.js 3D Gameweb design

Create a 3D building and driving game in a single self-contained HTML file using Three.js. Tests an AI's ability to combine 3D graphics, game logic, and UI interactions on the web.

Z.ai: GLM 5.1

Z.ai: GLM 5.1

Z-ai · Apr 2026html

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

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Pony Alpha

Pony Alpha

Openrouter · Feb 2026html

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

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