What is the difference between GPT-4o (Omni) and Google: Gemini 3.1 Flash Lite Preview?

GPT-4o (Omni) is developed by OpenAI while Google: Gemini 3.1 Flash Lite Preview is developed by Google AI. GPT-4o (Omni) has a 128K token context window vs Google: Gemini 3.1 Flash Lite Preview's 1.0M. 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 Google: Gemini 3.1 Flash Lite Preview?

It depends on your use case. GPT-4o (Omni) and Google: Gemini 3.1 Flash Lite Preview 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 Google: Gemini 3.1 Flash Lite Preview?

GPT-4o (Omni) costs $2.5/M input tokens and Google: Gemini 3.1 Flash Lite Preview costs $0.25/M input tokens. Google: Gemini 3.1 Flash Lite Preview is $2.25/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-4o (Omni) and Google: Gemini 3.1 Flash Lite Preview on Rival?

This page shows a side-by-side comparison of GPT-4o (Omni) and Google: Gemini 3.1 Flash Lite Preview 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 3, 2026

GPT-4o (Omni)vsGoogle: Gemini 3.1 Flash Lite Preview

46 fights queued

Why GPT-4o (Omni)?

Dead even. This one's a coin flip.

Why Google: Gemini 3.1 Flash Lite Preview?

7x cheaper overall$0.25/M in · $1.50/M out

8.2x more context1.0M

22 months newerMar 2026

GPT-4o (Omni)Google: Gemini 3.1 Flash Lite Preview

Input price

$2.50/M

$0.25/M

Output price

$10.00/M

$1.50/M

Context

128K

1.0M

Released

May 2024

Mar 2026

Favorites

GPT-4o (Omni)Google: Gemini 3.1 Flash Lite Preview

Movie

Inception

20108.4

2001: A Space Odyssey

19688.1

Album

Dark Side Of The Moon

suisside

Selected Ambient Works 85-92

Aphex Twin

Book

To Kill a Mockingbird

Harper Lee

Gödel, Escher, Bach

Douglas R. Hofstadter

City

Kyoto

Japan

Tokyo

Japan

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

Tetris (1984)

Puzzle4.4

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

Google: Gemini 3.1 Flash Lite Preview

Google · 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

Google: Gemini 3.1 Flash Lite Preview

Google · 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

Google: Gemini 3.1 Flash Lite Preview

Google · 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

Google: Gemini 3.1 Flash Lite Preview

Google · 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

Google: Gemini 3.1 Flash Lite Preview

Google · 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

Google: Gemini 3.1 Flash Lite Preview

Google · Mar 2026svg

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

Try this prompt

Vote

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Our Verdict

GPT-4o (Omni)

Google: Gemini 3.1 Flash Lite Preview

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

Google: Gemini 3.1 Flash Lite Preview is 6.7x 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 Google: Gemini 3.1 Flash Lite Preview on your actual task. 5 free credits. No card.

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FAQ

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GPT-4o (Omni) vs Google: Gemini 3.1 Flash Lite Preview

Which is better, GPT-4o (Omni) or Google: Gemini 3.1 Flash Lite Preview?