What is the difference between Gemini 1.5 Pro and GPT-5.5?

Gemini 1.5 Pro is developed by Google AI while GPT-5.5 is developed by OpenAI. Gemini 1.5 Pro has a 1.0M token context window vs GPT-5.5's 1.1M. You can compare their actual outputs across 18 challenges on Rival to see how they differ in practice.

Which is better, Gemini 1.5 Pro or GPT-5.5?

It depends on your use case. Gemini 1.5 Pro and GPT-5.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 18 challenges so you can judge which fits your needs best.

How much does Gemini 1.5 Pro cost compared to GPT-5.5?

Gemini 1.5 Pro costs $3.5/M input tokens and GPT-5.5 costs $5/M input tokens. Gemini 1.5 Pro is $1.50/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 1.5 Pro and GPT-5.5 on Rival?

This page shows a side-by-side comparison of Gemini 1.5 Pro and GPT-5.5 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 1.5 Pro and GPT-5.5?

Gemini 1.5 Pro is developed by Google AI while GPT-5.5 is developed by OpenAI. Gemini 1.5 Pro has a 1.0M token context window vs GPT-5.5's 1.1M. You can compare their actual outputs across 18 challenges on Rival to see how they differ in practice.

Which is better, Gemini 1.5 Pro or GPT-5.5?

It depends on your use case. Gemini 1.5 Pro and GPT-5.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 18 challenges so you can judge which fits your needs best.

How much does Gemini 1.5 Pro cost compared to GPT-5.5?

Gemini 1.5 Pro costs $3.5/M input tokens and GPT-5.5 costs $5/M input tokens. Gemini 1.5 Pro is $1.50/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 1.5 Pro and GPT-5.5 on Rival?

This page shows a side-by-side comparison of Gemini 1.5 Pro and GPT-5.5 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 1.5 Pro vs GPT-5.5: Which Is Better?

Updated Apr 2026

Our Verdict

GPT-5.5

Gemini 1.5 ProRunner-up

No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Gemini 1.5 Pro

Input

$3.50

1.4× cheaper

Output

$10.50

2.9× cheaper

GPT-5.5

Input

$5.00

Output

$30.00

Gemini 1.5 Pro is cheaper on both — 1.4× input, 2.9× output

Writing DNA

Style Comparison

Similarity

45%

GPT-5.5 uses 20.8x more headings

Gemini 1.5 Pro

GPT-5.5

61%Vocabulary58%

15wSentence Length18w

0.80Hedging0.74

3.7Bold2.9

3.3Lists5.1

0.00Emoji0.00

0.08Headings1.68

0.09Transitions0.03

Based on 8 + 26 text responses

Research

What we learned reading every model

Gemini 1.5 Pro and GPT-5.5 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 1.5 Pro vs MiniMax M3New provider

Gemini 1.5 Pro vs Llama 4 MaverickNew provider

Gemini 1.5 Pro vs Claude Opus 4New provider

Updated Apr 2026

Our Verdict

GPT-5.5

Gemini 1.5 ProRunner-up

No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Gemini 1.5 Pro

Input

$3.50

1.4× cheaper

Output

$10.50

2.9× cheaper

GPT-5.5

Input

$5.00

Output

$30.00

Gemini 1.5 Pro is cheaper on both — 1.4× input, 2.9× output

Writing DNA

Style Comparison

Similarity

45%

GPT-5.5 uses 20.8x more headings

Gemini 1.5 Pro

GPT-5.5

61%Vocabulary58%

15wSentence Length18w

0.80Hedging0.74

3.7Bold2.9

3.3Lists5.1

0.00Emoji0.00

0.08Headings1.68

0.09Transitions0.03

Based on 8 + 26 text responses

Research

What we learned reading every model

Gemini 1.5 Pro and GPT-5.5 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 1.5 Pro vs MiniMax M3New provider

Gemini 1.5 Pro vs Llama 4 MaverickNew provider

Gemini 1.5 Pro vs Claude Opus 4New provider