What is the difference between Claude Sonnet 4 and GPT-5 Pro?

Claude Sonnet 4 is developed by Anthropic while GPT-5 Pro is developed by OpenAI. Claude Sonnet 4 has a 200K token context window vs GPT-5 Pro's 400K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4 or GPT-5 Pro?

It depends on your use case. Claude Sonnet 4 and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4 cost compared to GPT-5 Pro?

Claude Sonnet 4 costs $3/M input tokens and GPT-5 Pro costs $15/M input tokens. Claude Sonnet 4 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 Sonnet 4 and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4 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 Sonnet 4 and GPT-5 Pro?

Claude Sonnet 4 is developed by Anthropic while GPT-5 Pro is developed by OpenAI. Claude Sonnet 4 has a 200K token context window vs GPT-5 Pro's 400K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4 or GPT-5 Pro?

It depends on your use case. Claude Sonnet 4 and GPT-5 Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4 cost compared to GPT-5 Pro?

Claude Sonnet 4 costs $3/M input tokens and GPT-5 Pro costs $15/M input tokens. Claude Sonnet 4 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 Sonnet 4 and GPT-5 Pro on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4 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.

Updated Oct 2025

Claude Sonnet 4vsGPT-5 Pro

Claude Sonnet 4 is cheaper than GPT-5 Pro at $3/M vs $15/M input tokens.

Claude Sonnet 4 and GPT-5 Pro compared across 42 shared prompts
Spec	Claude Sonnet 4	GPT-5 Pro
Input price	$3/M tokens	$15/M tokens
Output price	$15/M tokens	$120/M tokens
Context window	200K tokens	400K tokens
Released	May 2025	Oct 2025
SWE-bench Verified	72.7%	74.9%

Our Verdict

GPT-5 Pro

Claude Sonnet 4Runner-up

Not enough votes to call it. On the specs, GPT-5 Pro has the edge: bigger model tier, newer, bigger context window.

Claude Sonnet 4 costs 8.0x less per token.

Slight edge

What do Claude Sonnet 4 and GPT-5 Pro say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Sonnet 4

Input

$3.00

5.0× cheaper

Output

$15.00

8.0× cheaper

GPT-5 Pro

Input

$15.00

Output

$120.00

Claude Sonnet 4 is cheaper on both — 5.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

37%

Claude Sonnet 4 uses 503.7x more bold

Claude Sonnet 4

GPT-5 Pro

62%Vocabulary65%

111wSentence Length15w

0.40Hedging0.32

5.0Bold0.0

9.3Lists2.9

0.88Emoji0.00

2.16Headings0.00

0.33Transitions0.01

Based on 17 + 11 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5 Pro vs MiniMax M3New provider

GPT-5 Pro vs Ox AlphaNew provider

GPT-5 Pro vs MiniMax M1New provider

GPT-5 Pro vs Claude Opus 4Cross-provider

Claude Sonnet 4 vs GPT-5 CodexCross-provider

Claude Sonnet 4 vs GPT-5 MiniCross-provider

Claude Sonnet 4 vs GPT-5 NanoCross-provider

Claude Sonnet 4 vs GPT-5.1Cross-provider

Updated Oct 2025

Claude Sonnet 4vsGPT-5 Pro

Claude Sonnet 4 is cheaper than GPT-5 Pro at $3/M vs $15/M input tokens.

Claude Sonnet 4 and GPT-5 Pro compared across 42 shared prompts
Spec	Claude Sonnet 4	GPT-5 Pro
Input price	$3/M tokens	$15/M tokens
Output price	$15/M tokens	$120/M tokens
Context window	200K tokens	400K tokens
Released	May 2025	Oct 2025
SWE-bench Verified	72.7%	74.9%

Our Verdict

GPT-5 Pro

Claude Sonnet 4Runner-up

Not enough votes to call it. On the specs, GPT-5 Pro has the edge: bigger model tier, newer, bigger context window.

Claude Sonnet 4 costs 8.0x less per token.

Slight edge

What do Claude Sonnet 4 and GPT-5 Pro say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Sonnet 4

Input

$3.00

5.0× cheaper

Output

$15.00

8.0× cheaper

GPT-5 Pro

Input

$15.00

Output

$120.00

Claude Sonnet 4 is cheaper on both — 5.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

37%

Claude Sonnet 4 uses 503.7x more bold

Claude Sonnet 4

GPT-5 Pro

62%Vocabulary65%

111wSentence Length15w

0.40Hedging0.32

5.0Bold0.0

9.3Lists2.9

0.88Emoji0.00

2.16Headings0.00

0.33Transitions0.01

Based on 17 + 11 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5 Pro vs MiniMax M3New provider

GPT-5 Pro vs Ox AlphaNew provider

GPT-5 Pro vs MiniMax M1New provider

GPT-5 Pro vs Claude Opus 4Cross-provider

Claude Sonnet 4 vs GPT-5 CodexCross-provider

Claude Sonnet 4 vs GPT-5 MiniCross-provider

Claude Sonnet 4 vs GPT-5 NanoCross-provider

Claude Sonnet 4 vs GPT-5.1Cross-provider