What is the difference between GPT-5 Pro and Kimi K3?

GPT-5 Pro is developed by OpenAI while Kimi K3 is developed by Moonshot AI. GPT-5 Pro has a 400K token context window vs Kimi K3's 1.0M. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Pro or Kimi K3?

It depends on your use case. GPT-5 Pro and Kimi K3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does GPT-5 Pro cost compared to Kimi K3?

GPT-5 Pro costs $15/M input tokens and Kimi K3 costs $3/M input tokens. Kimi K3 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 GPT-5 Pro and Kimi K3 on Rival?

This page shows a side-by-side comparison of GPT-5 Pro and Kimi K3 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 GPT-5 Pro and Kimi K3?

GPT-5 Pro is developed by OpenAI while Kimi K3 is developed by Moonshot AI. GPT-5 Pro has a 400K token context window vs Kimi K3's 1.0M. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Pro or Kimi K3?

It depends on your use case. GPT-5 Pro and Kimi K3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does GPT-5 Pro cost compared to Kimi K3?

GPT-5 Pro costs $15/M input tokens and Kimi K3 costs $3/M input tokens. Kimi K3 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 GPT-5 Pro and Kimi K3 on Rival?

This page shows a side-by-side comparison of GPT-5 Pro and Kimi K3 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.

GPT-5 Pro vs Kimi K3: Which Is Better?

Updated Jul 2026

Our Verdict

GPT-5 Pro

Kimi K3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Kimi K3 is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

What do GPT-5 Pro and Kimi K3 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5 Pro

Input

$15.00

Output

$120.00

Kimi K3

Input

$3.00

5.0× cheaper

Output

$15.00

8.0× cheaper

Kimi K3 is cheaper on both — 5.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

58%

Kimi K3 uses 360.1x more bold

GPT-5 Pro

Kimi K3

65%Vocabulary58%

15wSentence Length21w

0.32Hedging0.46

0.0Bold3.6

2.9Lists3.4

0.00Emoji0.78

0.00Headings0.89

0.01Transitions0.17

Based on 11 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5 Pro vs Ox AlphaNew provider

GPT-5 Pro vs MiniMax M3New provider

Kimi K3 vs GPT-5Cross-provider

Updated Jul 2026

Our Verdict

GPT-5 Pro

Kimi K3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Kimi K3 is 8.0x cheaper per token — worth considering if cost matters.

Too close to call

What do GPT-5 Pro and Kimi K3 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5 Pro

Input

$15.00

Output

$120.00

Kimi K3

Input

$3.00

5.0× cheaper

Output

$15.00

8.0× cheaper

Kimi K3 is cheaper on both — 5.0× input, 8.0× output

Writing DNA

Style Comparison

Similarity

58%

Kimi K3 uses 360.1x more bold

GPT-5 Pro

Kimi K3

65%Vocabulary58%

15wSentence Length21w

0.32Hedging0.46

0.0Bold3.6

2.9Lists3.4

0.00Emoji0.78

0.00Headings0.89

0.01Transitions0.17

Based on 11 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5 Pro vs Ox AlphaNew provider

GPT-5 Pro vs MiniMax M3New provider

Kimi K3 vs GPT-5Cross-provider