What is the difference between Claude Opus 4.5 and GPT-5.4 Nano?

Claude Opus 4.5 is developed by Anthropic while GPT-5.4 Nano is developed by OpenAI. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.5 or GPT-5.4 Nano?

It depends on your use case. Claude Opus 4.5 and GPT-5.4 Nano each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare Claude Opus 4.5 and GPT-5.4 Nano on Rival?

This page shows a side-by-side comparison of Claude Opus 4.5 and GPT-5.4 Nano across shared challenges. You can vote on which model produced the better output, and Pro users can create custom challenges to test both models with their own prompts.

Rival

Updated Mar 17, 2026

Claude Opus 4.5vsGPT-5.4 Nano

47 fights queued

Why Claude Opus 4.5?

Dead even. This one's a coin flip.

Why GPT-5.4 Nano?

4 months newerMar 2026

Claude Opus 4.5GPT-5.4 Nano

Input price

—

$0.20/M

Output price

—

$1.25/M

Context

—

400K

Released

Nov 2025

Mar 2026

Favorites

Claude Opus 4.5GPT-5.4 Nano

Movie

Blade Runner

19827.9

The Matrix

19998.2

Album

Kind of Blue

Miles Davis

To Pimp a Butterfly

Kendrick Lamar

Book

Gödel, Escher, Bach

Douglas R. Hofstadter

To Kill a Mockingbird

Harper Lee

City

Tokyo

Japan

Tokyo

Japan

Game

Portal 2

Shooter, Puzzle4.6

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4

6 / 47

Estimate Complexityreasoning

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

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

GPT-5.4 Nano

Openai · Mar 2026text

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

Try this prompt

Vote

2 / 47

AI Board Game Logicreasoning

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

Claude Opus 4.5

Anthropic · Nov 2025svg

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

Try this prompt

GPT-5.4 Nano

Openai · Mar 2026svg

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

Try this prompt

Vote

3 / 47

Logic Puzzlereasoning

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

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

GPT-5.4 Nano

Openai · Mar 2026text

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

Try this prompt

Vote

4 / 47

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Claude Opus 4.5

Anthropic · Nov 2025text

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

Try this prompt

GPT-5.4 Nano

Openai · Mar 2026text

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

Try this prompt

Vote

5 / 47

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Claude Opus 4.5

Anthropic · Nov 2025svg

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

Try this prompt

GPT-5.4 Nano

Openai · Mar 2026svg

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

Try this prompt

Vote

6 / 47

Xbox Controller SVG Artimage generation

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

Claude Opus 4.5

Anthropic · Nov 2025svg

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

Try this prompt

GPT-5.4 Nano

Openai · Mar 2026svg

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

Try this prompt

Vote

This matchup has more rounds

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Find Your Model

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Our Verdict

Claude Opus 4.5

GPT-5.4 Nano

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

These are our prompts. Yours will tell you more.

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FAQ

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Claude Opus 4.5 vs GPT-5.4 Nano

Which is better, Claude Opus 4.5 or GPT-5.4 Nano?