What is the difference between Gemini 3.1 Pro Preview and GPT-5?

Gemini 3.1 Pro Preview is developed by Google AI while GPT-5 is developed by OpenAI. Gemini 3.1 Pro Preview has a 1.0M token context window vs GPT-5's 400K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3.1 Pro Preview or GPT-5?

It depends on your use case. Gemini 3.1 Pro Preview and GPT-5 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 Gemini 3.1 Pro Preview cost compared to GPT-5?

Gemini 3.1 Pro Preview costs $2/M input tokens and GPT-5 costs $1.25/M input tokens. GPT-5 is $0.75/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 Gemini 3.1 Pro Preview and GPT-5 on Rival?

This page shows a side-by-side comparison of Gemini 3.1 Pro Preview and GPT-5 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

What is the difference between Gemini 3.1 Pro Preview and GPT-5?

Gemini 3.1 Pro Preview is developed by Google AI while GPT-5 is developed by OpenAI. Gemini 3.1 Pro Preview has a 1.0M token context window vs GPT-5's 400K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3.1 Pro Preview or GPT-5?

It depends on your use case. Gemini 3.1 Pro Preview and GPT-5 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 Gemini 3.1 Pro Preview cost compared to GPT-5?

Gemini 3.1 Pro Preview costs $2/M input tokens and GPT-5 costs $1.25/M input tokens. GPT-5 is $0.75/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 Gemini 3.1 Pro Preview and GPT-5 on Rival?

This page shows a side-by-side comparison of Gemini 3.1 Pro Preview and GPT-5 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Gemini 3.1 Pro Preview vs GPT-5: Which Is Better?

Updated Feb 2026

Our Verdict

Gemini 3.1 Pro Preview

GPT-5Runner-up

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

Too close to call

API pricing

Cost per 1M tokens

Gemini 3.1 Pro Preview

Input

$2.00

Output

$12.00

GPT-5

Input

$1.25

1.6× cheaper

Output

$10.00

1.2× cheaper

GPT-5 is cheaper on both — 1.6× input, 1.2× output

Writing DNA

Style Comparison

Similarity

39%

Gemini 3.1 Pro Preview uses 25.9x more bold

Gemini 3.1 Pro Preview

GPT-5

54%Vocabulary65%

18wSentence Length13w

0.29Hedging0.20

4.9Bold0.2

3.3Lists4.6

0.00Emoji0.00

0.72Headings0.16

0.14Transitions0.03

Based on 23 + 16 text responses

Research

What we learned reading every model

Gemini 3.1 Pro Preview and GPT-5 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

Gemini 3.1 Pro Preview vs MiniMax M3New provider

GPT-5 vs Meta: Muse Spark 1.1New provider

GPT-5 vs Gemini 3.6 FlashCross-provider

Updated Feb 2026

Our Verdict

Gemini 3.1 Pro Preview

GPT-5Runner-up

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

Too close to call

API pricing

Cost per 1M tokens

Gemini 3.1 Pro Preview

Input

$2.00

Output

$12.00

GPT-5

Input

$1.25

1.6× cheaper

Output

$10.00

1.2× cheaper

GPT-5 is cheaper on both — 1.6× input, 1.2× output

Writing DNA

Style Comparison

Similarity

39%

Gemini 3.1 Pro Preview uses 25.9x more bold

Gemini 3.1 Pro Preview

GPT-5

54%Vocabulary65%

18wSentence Length13w

0.29Hedging0.20

4.9Bold0.2

3.3Lists4.6

0.00Emoji0.00

0.72Headings0.16

0.14Transitions0.03

Based on 23 + 16 text responses

Research

What we learned reading every model

Gemini 3.1 Pro Preview and GPT-5 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

Gemini 3.1 Pro Preview vs MiniMax M3New provider

GPT-5 vs Meta: Muse Spark 1.1New provider

GPT-5 vs Gemini 3.6 FlashCross-provider