What is the difference between Kimi K3 and Mercury 2?

Kimi K3 is developed by Moonshot AI while Mercury 2 is developed by Inception. Kimi K3 has a 1.0M token context window vs Mercury 2's 128K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Kimi K3 or Mercury 2?

It depends on your use case. Kimi K3 and Mercury 2 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Kimi K3 cost compared to Mercury 2?

Kimi K3 costs $3/M input tokens and Mercury 2 costs $0.25/M input tokens. Mercury 2 is $2.75/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 Kimi K3 and Mercury 2 on Rival?

This page shows a side-by-side comparison of Kimi K3 and Mercury 2 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 Kimi K3 and Mercury 2?

Kimi K3 is developed by Moonshot AI while Mercury 2 is developed by Inception. Kimi K3 has a 1.0M token context window vs Mercury 2's 128K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Kimi K3 or Mercury 2?

It depends on your use case. Kimi K3 and Mercury 2 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Kimi K3 cost compared to Mercury 2?

Kimi K3 costs $3/M input tokens and Mercury 2 costs $0.25/M input tokens. Mercury 2 is $2.75/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 Kimi K3 and Mercury 2 on Rival?

This page shows a side-by-side comparison of Kimi K3 and Mercury 2 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.

Kimi K3 vs Mercury 2: Which Is Better?

Updated Jul 2026

Our Verdict

Kimi K3

Mercury 2Runner-up

No community votes yet. On paper, Kimi K3 has the edge — bigger model tier, newer, bigger context window.

Mercury 2 is 20x cheaper per token — worth considering if cost matters.

Slight edge

What do Kimi K3 and Mercury 2 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Kimi K3

Input

$3.00

Output

$15.00

Mercury 2

Input

$0.25

12× cheaper

Output

$0.75

20× cheaper

Mercury 2 is cheaper on both — 12× input, 20× output

Writing DNA

Style Comparison

Similarity

51%

Kimi K3 uses 9.5x more emoji

Kimi K3

Mercury 2

58%Vocabulary53%

21wSentence Length22w

0.46Hedging0.40

3.6Bold6.6

3.4Lists2.6

0.78Emoji0.08

0.89Headings0.87

0.17Transitions0.14

Based on 27 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Mercury 2 vs Ox AlphaNew provider

Mercury 2 vs MiniMax M3New provider

Mercury 2 vs GPT-5New provider

Updated Jul 2026

Our Verdict

Kimi K3

Mercury 2Runner-up

No community votes yet. On paper, Kimi K3 has the edge — bigger model tier, newer, bigger context window.

Mercury 2 is 20x cheaper per token — worth considering if cost matters.

Slight edge

What do Kimi K3 and Mercury 2 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Kimi K3

Input

$3.00

Output

$15.00

Mercury 2

Input

$0.25

12× cheaper

Output

$0.75

20× cheaper

Mercury 2 is cheaper on both — 12× input, 20× output

Writing DNA

Style Comparison

Similarity

51%

Kimi K3 uses 9.5x more emoji

Kimi K3

Mercury 2

58%Vocabulary53%

21wSentence Length22w

0.46Hedging0.40

3.6Bold6.6

3.4Lists2.6

0.78Emoji0.08

0.89Headings0.87

0.17Transitions0.14

Based on 27 + 23 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Mercury 2 vs Ox AlphaNew provider

Mercury 2 vs MiniMax M3New provider

Mercury 2 vs GPT-5New provider