What is the difference between GPT-5.4 Nano and Claude Opus 4.1?

GPT-5.4 Nano is developed by OpenAI while Claude Opus 4.1 is developed by Anthropic. GPT-5.4 Nano has a 400K token context window vs Claude Opus 4.1's 200K. You can compare their actual outputs across 27 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.4 Nano or Claude Opus 4.1?

It depends on your use case. GPT-5.4 Nano and Claude Opus 4.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 27 challenges so you can judge which fits your needs best.

How much does GPT-5.4 Nano cost compared to Claude Opus 4.1?

GPT-5.4 Nano costs $0.2/M input tokens and Claude Opus 4.1 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 4.1 on Rival?

This page shows a side-by-side comparison of GPT-5.4 Nano and Claude Opus 4.1 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 4.1

27 fights queued

Why GPT-5.4 Nano?

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

2x more context400K

7 months newerMar 2026

Why Claude Opus 4.1?

Dead even. This one's a coin flip.

GPT-5.4 NanoClaude Opus 4.1

Input price

$0.20/M

$15.00/M

Output price

$1.25/M

$75.00/M

Context

400K

200K

Released

Mar 2026

Aug 2025

Favorites

GPT-5.4 NanoClaude Opus 4.1

Movie

The Matrix

19998.2

Her

20137.8

Album

To Pimp a Butterfly

Kendrick Lamar

Kind of Blue

Miles Davis

Book

To Kill a Mockingbird

Harper Lee

Братья Карамазовы

Фёдор Михайлович Достоевский

City

Tokyo

Japan

Istanbul

Turkey

Game

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4

Portal 2

Shooter, Puzzle4.6

6 / 27

Logic Puzzlereasoning

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

GPT-5.4 Nano

Openai · Mar 2026text

Sally has 2 sisters.

Reason: Each brother has 2 sisters total (including Sally). Since Sally is one sister, there is one other sister besides her—so Sally has 2 sisters in total.

Try this prompt

Claude Opus 4.1

Anthropic · Aug 2025text

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

Try this prompt

Vote

2 / 27

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-5.4 Nano

Openai · Mar 2026text

Here are 5 jokes:

I told my computer I needed a break, and it said, “No problem—I’ll go to sleep.”
Why don’t scientists trust atoms? Because they make up everything.
I used to hate facial hair… but then it grew on me.
Parallel lines have so much in common. It’s a shame they’ll never meet.
Why did the scarecrow win an award? Because he was outstanding in his field.

How many are unique?
5 — all five are different.

Try this prompt

Claude Opus 4.1

Anthropic · Aug 2025text

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

Try this prompt

Vote

3 / 27

Xbox Controller SVG Artimage generation

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

GPT-5.4 Nano

Openai · Mar 2026svg

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

Try this prompt

Claude Opus 4.1

Anthropic · Aug 2025svg

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

Try this prompt

Vote

4 / 27

Realistic AI Interviewconversation

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

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 4.1

Anthropic · Aug 2025text

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

Try this prompt

Vote

5 / 27

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

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 4.1

Anthropic · Aug 2025text

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

Try this prompt

Vote

6 / 27

Minimalist Landing Pageweb design

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

GPT-5.4 Nano

Openai · Mar 2026website

Try this prompt

Claude Opus 4.1

Anthropic · Aug 2025website

Try this prompt

Vote

This matchup has more rounds

21+ more head-to-head results. Free. Not a trick.

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Find Your Model

Static demos are useful. Your prompt matters more.

Run this matchup on your actual task. 30 seconds. No card.

Can you tell Claude from GPT?

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Our Verdict

GPT-5.4 Nano

Claude Opus 4.1

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 4.1 on your actual task. 5 free credits. No card.

Test with your prompt

FAQ

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GPT-5.4 Nano vs Claude Opus 4.1

Which is better, GPT-5.4 Nano or Claude Opus 4.1?