What is the difference between Llama 3.1 405B and Llama 4 Scout?

Both are developed by Meta AI but target different use cases. Llama 3.1 405B has a 128K token context window vs Llama 4 Scout's 10.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Llama 3.1 405B or Llama 4 Scout?

It depends on your use case. Llama 3.1 405B and Llama 4 Scout each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Llama 3.1 405B cost compared to Llama 4 Scout?

Llama 3.1 405B costs $2.7/M input tokens and Llama 4 Scout costs $0.25/M input tokens. Llama 4 Scout is $2.45/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 Llama 3.1 405B and Llama 4 Scout on Rival?

This page shows a side-by-side comparison of Llama 3.1 405B and Llama 4 Scout 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 Llama 3.1 405B and Llama 4 Scout?

Both are developed by Meta AI but target different use cases. Llama 3.1 405B has a 128K token context window vs Llama 4 Scout's 10.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Llama 3.1 405B or Llama 4 Scout?

It depends on your use case. Llama 3.1 405B and Llama 4 Scout each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Llama 3.1 405B cost compared to Llama 4 Scout?

Llama 3.1 405B costs $2.7/M input tokens and Llama 4 Scout costs $0.25/M input tokens. Llama 4 Scout is $2.45/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 Llama 3.1 405B and Llama 4 Scout on Rival?

This page shows a side-by-side comparison of Llama 3.1 405B and Llama 4 Scout 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.

Llama 3.1 405B vs Llama 4 Scout: Which Is Better?

Updated Apr 2025

Our Verdict

Llama 3.1 405B

Llama 4 Scout

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

Llama 4 Scout is 6.2x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Llama 3.1 405B

Input

$2.70

Output

$3.10

Llama 4 Scout

Input

$0.25

11× cheaper

Output

$0.50

6.2× cheaper

Llama 4 Scout is cheaper on both — 11× input, 6.2× output

Writing DNA

Style Comparison

Similarity

52%

Llama 4 Scout uses 412.3x more bold

Llama 3.1 405B

Llama 4 Scout

56%Vocabulary43%

15wSentence Length42w

0.41Hedging0.81

0.0Bold4.1

1.9Lists7.3

0.03Emoji0.00

0.00Headings0.30

0.16Transitions0.04

Based on 5 + 10 text responses

Research

What we learned reading every model

Llama 3.1 405B and Llama 4 Scout 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

Llama 3.1 405B vs GPT-5New provider

Llama 3.1 405B vs Llama 4 MaverickVersion compare

Llama 3.1 405B vs MiniMax M3New provider

Updated Apr 2025

Our Verdict

Llama 3.1 405B

Llama 4 Scout

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

Llama 4 Scout is 6.2x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Llama 3.1 405B

Input

$2.70

Output

$3.10

Llama 4 Scout

Input

$0.25

11× cheaper

Output

$0.50

6.2× cheaper

Llama 4 Scout is cheaper on both — 11× input, 6.2× output

Writing DNA

Style Comparison

Similarity

52%

Llama 4 Scout uses 412.3x more bold

Llama 3.1 405B

Llama 4 Scout

56%Vocabulary43%

15wSentence Length42w

0.41Hedging0.81

0.0Bold4.1

1.9Lists7.3

0.03Emoji0.00

0.00Headings0.30

0.16Transitions0.04

Based on 5 + 10 text responses

Research

What we learned reading every model

Llama 3.1 405B and Llama 4 Scout 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

Llama 3.1 405B vs GPT-5New provider

Llama 3.1 405B vs Llama 4 MaverickVersion compare

Llama 3.1 405B vs MiniMax M3New provider