What is the difference between Claude 3 Sonnet and GPT-5 Pro?

Claude 3 Sonnet is developed by Anthropic while GPT-5 Pro is developed by OpenAI. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Sonnet or GPT-5 Pro?

It depends on your use case. Claude 3 Sonnet and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does Claude 3 Sonnet cost compared to GPT-5 Pro?

Claude 3 Sonnet costs $3/M input tokens and GPT-5 Pro costs $15/M input tokens. Claude 3 Sonnet is $12.00/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 Claude 3 Sonnet and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of Claude 3 Sonnet 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 Claude 3 Sonnet and GPT-5 Pro?

Claude 3 Sonnet is developed by Anthropic while GPT-5 Pro is developed by OpenAI. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Sonnet or GPT-5 Pro?

It depends on your use case. Claude 3 Sonnet and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does Claude 3 Sonnet cost compared to GPT-5 Pro?

Claude 3 Sonnet costs $3/M input tokens and GPT-5 Pro costs $15/M input tokens. Claude 3 Sonnet is $12.00/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 Claude 3 Sonnet and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of Claude 3 Sonnet 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.

Claude 3 Sonnet vs GPT-5 Pro: Which Is Better?

Updated Oct 2025

Our Verdict

GPT-5 Pro

Claude 3 SonnetRunner-up

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

Claude 3 Sonnet is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Sonnet

Input

$3.00

5.0× cheaper

Output

$15.00

8.0× cheaper

GPT-5 Pro

Input

$15.00

Output

$120.00

Claude 3 Sonnet is cheaper on both — 5.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

52%

Claude 3 Sonnet uses 37.6x more transitions

Claude 3 Sonnet

GPT-5 Pro

48%Vocabulary65%

14wSentence Length15w

0.32Hedging0.32

0.0Bold0.0

3.6Lists2.9

0.00Emoji0.00

0.00Headings0.00

0.38Transitions0.01

Based on 4 + 11 text responses

Research

What we learned reading every model

Claude 3 Sonnet 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 MiniMax M3New provider

GPT-5 Pro vs Grok 3New provider

GPT-5 Pro vs Llama 4 MaverickNew provider

Updated Oct 2025

Our Verdict

GPT-5 Pro

Claude 3 SonnetRunner-up

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

Claude 3 Sonnet is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Sonnet

Input

$3.00

5.0× cheaper

Output

$15.00

8.0× cheaper

GPT-5 Pro

Input

$15.00

Output

$120.00

Claude 3 Sonnet is cheaper on both — 5.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

52%

Claude 3 Sonnet uses 37.6x more transitions

Claude 3 Sonnet

GPT-5 Pro

48%Vocabulary65%

14wSentence Length15w

0.32Hedging0.32

0.0Bold0.0

3.6Lists2.9

0.00Emoji0.00

0.00Headings0.00

0.38Transitions0.01

Based on 4 + 11 text responses

Research

What we learned reading every model

Claude 3 Sonnet 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 MiniMax M3New provider

GPT-5 Pro vs Grok 3New provider

GPT-5 Pro vs Llama 4 MaverickNew provider