What is the difference between ChatGPT-4o (March 2025) and GPT-5 Pro?

Both are developed by OpenAI but target different use cases. ChatGPT-4o (March 2025) has a 128K token context window vs GPT-5 Pro's 400K. You can compare their actual outputs across 28 challenges on Rival to see how they differ in practice.

Which is better, ChatGPT-4o (March 2025) or GPT-5 Pro?

It depends on your use case. ChatGPT-4o (March 2025) and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 28 challenges so you can judge which fits your needs best.

How much does ChatGPT-4o (March 2025) cost compared to GPT-5 Pro?

ChatGPT-4o (March 2025) costs $5/M input tokens and GPT-5 Pro costs $15/M input tokens. ChatGPT-4o (March 2025) is $10.00/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 ChatGPT-4o (March 2025) and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and GPT-5 Pro 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 ChatGPT-4o (March 2025) and GPT-5 Pro?

Both are developed by OpenAI but target different use cases. ChatGPT-4o (March 2025) has a 128K token context window vs GPT-5 Pro's 400K. You can compare their actual outputs across 28 challenges on Rival to see how they differ in practice.

Which is better, ChatGPT-4o (March 2025) or GPT-5 Pro?

It depends on your use case. ChatGPT-4o (March 2025) and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 28 challenges so you can judge which fits your needs best.

How much does ChatGPT-4o (March 2025) cost compared to GPT-5 Pro?

ChatGPT-4o (March 2025) costs $5/M input tokens and GPT-5 Pro costs $15/M input tokens. ChatGPT-4o (March 2025) is $10.00/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 ChatGPT-4o (March 2025) and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and GPT-5 Pro 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.

ChatGPT-4o (March 2025) vs GPT-5 Pro: Which Is Better?

Updated Oct 2025

Our Verdict

GPT-5 Pro

ChatGPT-4o (March 2025)Runner-up

No community votes yet. On paper, GPT-5 Pro has the edge — newer, bigger context window.

ChatGPT-4o (March 2025) is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

ChatGPT-4o (March 2025)

Input

$5.00

3.0× cheaper

Output

$15.00

8.0× cheaper

GPT-5 Pro

Input

$15.00

Output

$120.00

ChatGPT-4o (March 2025) is cheaper on both — 3.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

39%

ChatGPT-4o (March 2025) uses 329.7x more bold

ChatGPT-4o (March 2025)

GPT-5 Pro

55%Vocabulary65%

24wSentence Length15w

0.52Hedging0.32

3.3Bold0.0

6.0Lists2.9

0.94Emoji0.00

0.63Headings0.00

0.05Transitions0.01

Based on 15 + 11 text responses

Research

What we learned reading every model

ChatGPT-4o (March 2025) and GPT-5 Pro 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

GPT-5 Pro vs Llama 4 MaverickNew provider

ChatGPT-4o (March 2025) vs GPT-5Same lab

ChatGPT-4o (March 2025) vs MiniMax M3New provider

Updated Oct 2025

Our Verdict

GPT-5 Pro

ChatGPT-4o (March 2025)Runner-up

No community votes yet. On paper, GPT-5 Pro has the edge — newer, bigger context window.

ChatGPT-4o (March 2025) is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

ChatGPT-4o (March 2025)

Input

$5.00

3.0× cheaper

Output

$15.00

8.0× cheaper

GPT-5 Pro

Input

$15.00

Output

$120.00

ChatGPT-4o (March 2025) is cheaper on both — 3.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

39%

ChatGPT-4o (March 2025) uses 329.7x more bold

ChatGPT-4o (March 2025)

GPT-5 Pro

55%Vocabulary65%

24wSentence Length15w

0.52Hedging0.32

3.3Bold0.0

6.0Lists2.9

0.94Emoji0.00

0.63Headings0.00

0.05Transitions0.01

Based on 15 + 11 text responses

Research

What we learned reading every model

ChatGPT-4o (March 2025) and GPT-5 Pro 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

GPT-5 Pro vs Llama 4 MaverickNew provider

ChatGPT-4o (March 2025) vs GPT-5Same lab

ChatGPT-4o (March 2025) vs MiniMax M3New provider