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

GPT-5.4 Mini is developed by OpenAI while Claude Opus 4 is developed by Anthropic. GPT-5.4 Mini 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 Mini or Claude Opus 4?

It depends on your use case. GPT-5.4 Mini 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 Mini cost compared to Claude Opus 4?

GPT-5.4 Mini costs $0.75/M input tokens and Claude Opus 4 costs $15/M input tokens. GPT-5.4 Mini is $14.25/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 Mini and Claude Opus 4 on Rival?

This page shows a side-by-side comparison of GPT-5.4 Mini 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 MinivsClaude Opus 4

35 fights queued

Why GPT-5.4 Mini?

17x cheaper overall$0.75/M in · $4.50/M out

2x more context400K

10 months newerMar 2026

Why Claude Opus 4?

Dead even. This one's a coin flip.

GPT-5.4 MiniClaude Opus 4

Input price

$0.75/M

$15.00/M

Output price

$4.50/M

$75.00/M

Context

400K

200K

Released

Mar 2026

May 2025

Favorites

GPT-5.4 MiniClaude Opus 4

Movie

The Godfather

19728.7

Arrival

20167.6

Album

Kid A

Radiohead

The Dark Side of the Moon

Pink Floyd

Book

Pride and Prejudice

Jane Austen

Cien años de soledad

Gabriel García Márquez

City

Kyoto

Japan

Istanbul

Turkey

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

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 Mini

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

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

Try this prompt

Vote

2 / 35

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-5.4 Mini

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

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

Try this prompt

Vote

3 / 35

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

GPT-5.4 Mini

Openai · Mar 2026svg

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

Try this prompt

Claude Opus 4

Anthropic · May 2025svg

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

Try this prompt

Vote

4 / 35

Xbox Controller SVG Artimage generation

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

GPT-5.4 Mini

Openai · Mar 2026svg

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

Try this prompt

Claude Opus 4

Anthropic · May 2025svg

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

Try this prompt

Vote

5 / 35

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

GPT-5.4 Mini

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

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

Try this prompt

Vote

6 / 35

Pokémon Battle UI Recreationweb design

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

GPT-5.4 Mini

Openai · Mar 2026website

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

Try this prompt

Claude Opus 4

Anthropic · May 2025website

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

Try this prompt

Vote

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Our Verdict

GPT-5.4 Mini

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 Mini is 17x 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 Mini vs Claude Opus 4 on your actual task. 5 free credits. No card.

Test with your prompt

FAQ

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GPT-5.4 Mini vs Claude Opus 4

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