What is the difference between Z.AI: GLM 4.5 and Claude Opus 4?

Z.AI: GLM 4.5 is developed by Zhipu AI while Claude Opus 4 is developed by Anthropic. Z.AI: GLM 4.5 has a 128K token context window vs Claude Opus 4's 200K. These results are based on blind head-to-head voting across 30 challenges.

Which is better, Z.AI: GLM 4.5 or Claude Opus 4?

Based on 16 community votes on RIVAL, Z.AI: GLM 4.5 and Claude Opus 4 are closely matched with similar win rates. The better choice depends on your specific use case — compare their real outputs side-by-side across 30 challenges to decide.

How much does Z.AI: GLM 4.5 cost compared to Claude Opus 4?

Z.AI: GLM 4.5 costs $0.6/M input tokens and Claude Opus 4 costs $15/M input tokens. Z.AI: GLM 4.5 is $14.40/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are Z.AI: GLM 4.5 vs Claude Opus 4 votes collected on RIVAL?

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 16 votes have been collected for this pair across 30 challenges. All vote data is part of RIVAL's open dataset.

Rival

Z.AI: GLM 4.5vsClaude Opus 4

30 challenges

Why Z.AI: GLM 4.5?

32.7x cheaper overall$0.60/M in · $2.20/M out

2 months newerJul 2025

Why Claude Opus 4?

1.6x more context200K

Leads 1 of 1 benchmarks

Stronger on SWE-bench Verified72.5% vs 64.2%

Favorites

Z.AI: GLM 4.5Claude Opus 4

Movie

Inception

20108.4

Arrival

20167.6

Album

—

The Dark Side of the Moon

Pink Floyd

Book

—

Cien años de soledad

Gabriel García Márquez

City

—

Istanbul

Turkey

Game

—

Portal 2

Shooter, Puzzle4.6

12 / 30

Logic Puzzlereasoning

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

Z.AI: GLM 4.5

Zhipu · Jul 2025text

No content available for this output.

Claude Opus 4

Anthropic · May 2025text

I need to work through this step-by-step.

Given information:

Sally is a girl
Sally has 3 brothers
Each brother has 2 sisters

Since Sally is one of the sisters that each brother has, and each brother has 2 sisters total, that means th ere must be exactly 2 sisters in the family.

The 2 sisters are:

Sally
One other sister

Therefore, Sally has 1 sister.

Vote

2 / 30

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Z.AI: GLM 4.5

Zhipu · Jul 2025text

No content available for this output.

Claude Opus 4

Anthropic · May 2025text

Here are 5 jokes:

Why don't scientists trust atoms? Because they make up everything!
What do you call a bear with no teeth? A gummy bear!
Why did the scarecrow win an award? He was outstanding in his field!
What do you call a fake noodle? An impasta!
Why don't eggs tell jokes? They'd crack up!

All 5 jokes are unique - each one has a different setup and punchline, covering different topics (atoms/scie nce, bears, scarecrows, pasta, and eggs).

Vote

3 / 30

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Z.AI: GLM 4.5

Zhipu · Jul 2025svg

No content available for this output.

Claude Opus 4

Anthropic · May 2025svg

Vote

4 / 30

Xbox Controller SVG Artimage generation

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

Z.AI: GLM 4.5

Zhipu · Jul 2025svg

No content available for this output.

Claude Opus 4

Anthropic · May 2025svg

Vote

5 / 30

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Z.AI: GLM 4.5

Zhipu · Jul 2025text

No content available for this output.

Claude Opus 4

Anthropic · May 2025text

No content available for this output.

Vote

6 / 30

Pokémon Battle UI Recreationweb design

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

Z.AI: GLM 4.5

Zhipu · Jul 2025website

No content available for this output.

Claude Opus 4

Anthropic · May 2025website

No content available for this output.

Vote

7 / 30

Mario Level UI Recreationweb design

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

Z.AI: GLM 4.5

Zhipu · Jul 2025website

Claude Opus 4

Anthropic · May 2025website

Vote

8 / 30

Linear App Cloneweb design

Tests an AI's ability to replicate an existing UI with Tailwind CSS

Z.AI: GLM 4.5

Zhipu · Jul 2025website

No content available for this output.

Claude Opus 4

Anthropic · May 2025website

No content available for this output.

Vote

9 / 30

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

Z.AI: GLM 4.5

Zhipu · Jul 2025website

No content available for this output.

Claude Opus 4

Anthropic · May 2025website

No content available for this output.

Vote

10 / 30

World Map SVGimage generation

Tests an AI's ability to create a detailed world map in SVG format

Z.AI: GLM 4.5

Zhipu · Jul 2025svg

No content available for this output.

Claude Opus 4

Anthropic · May 2025svg

No content available for this output.

Vote

Random Tailwind Webappweb design

Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.

Z.AI: GLM 4.5

Zhipu · Jul 2025website

No content available for this output.

Claude Opus 4

Anthropic · May 2025website

No content available for this output.

Vote

12 / 30

Surprise Animal SVGimage generation

Generate SVG art of a randomly chosen animal in a setting of its choosing.

Z.AI: GLM 4.5

Zhipu · Jul 2025svg

No content available for this output.

Claude Opus 4

Anthropic · May 2025svg

No content available for this output.

Vote

12 of 30

FAQ

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