What is the difference between Claude Opus 4.5 and Llama 3.1 405B?

Claude Opus 4.5 is developed by Anthropic while Llama 3.1 405B is developed by Meta AI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.5 or Llama 3.1 405B?

It depends on your use case. Claude Opus 4.5 and Llama 3.1 405B 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 can I compare Claude Opus 4.5 and Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of Claude Opus 4.5 and Llama 3.1 405B 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 Opus 4.5 and Llama 3.1 405B?

Claude Opus 4.5 is developed by Anthropic while Llama 3.1 405B is developed by Meta AI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.5 or Llama 3.1 405B?

It depends on your use case. Claude Opus 4.5 and Llama 3.1 405B 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 can I compare Claude Opus 4.5 and Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of Claude Opus 4.5 and Llama 3.1 405B 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 Opus 4.5 vs Llama 3.1 405B: Which Is Better?

Updated Nov 2025

Our Verdict

Claude Opus 4.5

Llama 3.1 405B

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

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.5

Input

—

Output

—

Llama 3.1 405B

Input

$2.70

Output

$3.10

Writing DNA

Style Comparison

Similarity

34%

Claude Opus 4.5 uses 580.0x more bold

Claude Opus 4.5

Llama 3.1 405B

64%Vocabulary56%

55wSentence Length15w

0.86Hedging0.41

5.8Bold0.0

4.5Lists1.9

0.15Emoji0.03

1.59Headings0.00

0.05Transitions0.16

Based on 24 + 5 text responses

Research

What we learned reading every model

Claude Opus 4.5 and Llama 3.1 405B 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 MiniMax M3New provider

Claude Opus 4.5 vs Grok 3New provider

Claude Opus 4.5 vs OpenAI o3New provider

Updated Nov 2025

Our Verdict

Claude Opus 4.5

Llama 3.1 405B

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

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4.5

Input

—

Output

—

Llama 3.1 405B

Input

$2.70

Output

$3.10

Writing DNA

Style Comparison

Similarity

34%

Claude Opus 4.5 uses 580.0x more bold

Claude Opus 4.5

Llama 3.1 405B

64%Vocabulary56%

55wSentence Length15w

0.86Hedging0.41

5.8Bold0.0

4.5Lists1.9

0.15Emoji0.03

1.59Headings0.00

0.05Transitions0.16

Based on 24 + 5 text responses

Research

What we learned reading every model

Claude Opus 4.5 and Llama 3.1 405B 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 MiniMax M3New provider

Claude Opus 4.5 vs Grok 3New provider

Claude Opus 4.5 vs OpenAI o3New provider