What is the difference between GPT-4o (Omni) and GPT-5.4 Nano?

Both are developed by OpenAI but target different use cases. GPT-4o (Omni) has a 128K token context window vs GPT-5.4 Nano's 400K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, GPT-4o (Omni) or GPT-5.4 Nano?

It depends on your use case. GPT-4o (Omni) and GPT-5.4 Nano each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How much does GPT-4o (Omni) cost compared to GPT-5.4 Nano?

GPT-4o (Omni) costs $2.5/M input tokens and GPT-5.4 Nano costs $0.2/M input tokens. GPT-5.4 Nano is $2.30/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-4o (Omni) and GPT-5.4 Nano on Rival?

This page shows a side-by-side comparison of GPT-4o (Omni) 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

GPT-4o (Omni)vsGPT-5.4 Nano

46 fights queued

Why GPT-4o (Omni)?

Dead even. This one's a coin flip.

Why GPT-5.4 Nano?

8.4x cheaper overall$0.20/M in · $1.25/M out

3.1x more context400K

22 months newerMar 2026

GPT-4o (Omni)GPT-5.4 Nano

Input price

$2.50/M

$0.20/M

Output price

$10.00/M

$1.25/M

Context

128K

400K

Released

May 2024

Mar 2026

Favorites

GPT-4o (Omni)GPT-5.4 Nano

Movie

Inception

20108.4

The Matrix

19998.2

Album

Dark Side Of The Moon

suisside

To Pimp a Butterfly

Kendrick Lamar

Book

To Kill a Mockingbird

Harper Lee

To Kill a Mockingbird

Harper Lee

City

Kyoto

Japan

Tokyo

Japan

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

The Legend of Zelda: Ocarina of Time

Adventure, Action4.4

6 / 46

Estimate Complexityreasoning

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

GPT-4o (Omni)

Openai · May 2024text

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 / 46

AI Board Game Logicreasoning

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

GPT-4o (Omni)

Openai · May 2024svg

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 / 46

Logic Puzzlereasoning

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

GPT-4o (Omni)

Openai · May 2024text

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 / 46

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-4o (Omni)

Openai · May 2024text

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 / 46

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

GPT-4o (Omni)

Openai · May 2024svg

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 / 46

Xbox Controller SVG Artimage generation

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

GPT-4o (Omni)

Openai · May 2024svg

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

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

$0No card. No catch. Just a login.

Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy

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?

Run your prompt blind. Judge outputs, not logos.

Take the blind test

Our Verdict

GPT-4o (Omni)

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.

GPT-5.4 Nano is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

These are our prompts. Yours will tell you more.

Run GPT-4o (Omni) vs GPT-5.4 Nano on your actual task. 5 free credits. No card.

Test with your prompt

FAQ

Keep going

GPT-4o (Omni) vs Llama 4 MaverickNew provider

GPT-5.4 Nano vs GPT-5Same lab

GPT-4o (Omni) vs Grok 3New provider

This comparison gets 800+ views/month. Your brand could be here.

Advertise

GPT-4o (Omni) vs GPT-5.4 Nano

Which is better, GPT-4o (Omni) or GPT-5.4 Nano?