Gemini 3.1 Pro Preview vs GPT-4o (Omni)

Compare Gemini 3.1 Pro Preview by Google AI against GPT-4o (Omni) by OpenAI, context windows of 1.0M vs 128K, tested across 52 shared challenges. Updated April 2026.

Which is better, Gemini 3.1 Pro Preview or GPT-4o (Omni)?

Gemini 3.1 Pro Preview and GPT-4o (Omni) are both competitive models. Gemini 3.1 Pro Preview costs $2/M input tokens vs $2.5/M for GPT-4o (Omni). Context windows: 1049K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Gemini 3.1 Pro Preview and GPT-4o (Omni)

Gemini 3.1 Pro Preview is made by google while GPT-4o (Omni) is from openai. Gemini 3.1 Pro Preview has a 1049K token context window compared to GPT-4o (Omni)'s 128K. On pricing, Gemini 3.1 Pro Preview costs $2/M input tokens vs $2.5/M for GPT-4o (Omni).

Our Verdict
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview
GPT-4o (Omni)
GPT-4o (Omni)Runner-up

No community votes yet. On paper, Gemini 3.1 Pro Preview has the edge — newer, bigger context window.

Too close to call
Writing DNA

Style Comparison

Similarity
97%

GPT-4o (Omni) uses 2.5x more emoji

Gemini 3.1 Pro Preview
GPT-4o (Omni)
54%Vocabulary54%
18wSentence Length18w
0.29Hedging0.72
4.9Bold7.3
3.3Lists5.6
0.00Emoji0.03
0.72Headings1.40
0.14Transitions0.26
Based on 23 + 24 text responses
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Gemini 3.1 Pro PreviewGPT-4o (Omni)

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