What is the difference between GPT-5.4 Nano and Claude Opus 4?

GPT-5.4 Nano is developed by OpenAI while Claude Opus 4 is developed by Anthropic. GPT-5.4 Nano has a 400K token context window vs Claude Opus 4's 200K. You can compare their actual outputs across 35 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.4 Nano or Claude Opus 4?

It depends on your use case. GPT-5.4 Nano and Claude Opus 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 35 challenges so you can judge which fits your needs best.

How much does GPT-5.4 Nano cost compared to Claude Opus 4?

GPT-5.4 Nano costs $0.2/M input tokens and Claude Opus 4 costs $15/M input tokens. GPT-5.4 Nano is $14.80/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-5.4 Nano and Claude Opus 4 on Rival?

This page shows a side-by-side comparison of GPT-5.4 Nano and Claude Opus 4 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

GPT-5.4 NanovsClaude Opus 4

35 fights queued

Why GPT-5.4 Nano?

61.4x cheaper overall$0.20/M in · $1.25/M out

2x more context400K

10 months newerMar 2026

Why Claude Opus 4?

Dead even. This one's a coin flip.

GPT-5.4 NanoClaude Opus 4

Input price

$0.20/M

$15.00/M

Output price

$1.25/M

$75.00/M

Context

400K

200K

Released

Mar 2026

May 2025

Favorites

GPT-5.4 NanoClaude Opus 4

Movie

The Matrix

19998.2

Arrival

20167.6

Album

To Pimp a Butterfly

Kendrick Lamar

The Dark Side of the Moon

Pink Floyd

Book

To Kill a Mockingbird

Harper Lee

Cien años de soledad

Gabriel García Márquez

City

Tokyo

Japan

Istanbul

Turkey

Game

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4

Portal 2

Shooter, Puzzle4.6

6 / 35

Logic Puzzlereasoning

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

GPT-5.4 Nano

Openai · Mar 2026text

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

Try this prompt

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

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

Try this prompt

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Our Verdict

GPT-5.4 Nano

Claude Opus 4

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

GPT-5.4 Nano is 60x cheaper per token — worth considering if cost matters.

Too close to call

These are our prompts. Yours will tell you more.

Run GPT-5.4 Nano vs Claude Opus 4 on your actual task. 5 free credits. No card.

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FAQ

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GPT-5.4 Nano vs Claude Opus 4

Which is better, GPT-5.4 Nano or Claude Opus 4?