What is the difference between Claude 3 Opus and Llama 3.1 405B?

Claude 3 Opus is developed by Anthropic while Llama 3.1 405B is developed by Meta AI. Claude 3 Opus has a 200K token context window vs Llama 3.1 405B's 128K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Llama 3.1 405B?

It depends on your use case. Claude 3 Opus and Llama 3.1 405B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Llama 3.1 405B?

Claude 3 Opus costs $15/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. Llama 3.1 405B is $12.30/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 3 Opus and Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of Claude 3 Opus 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.

Updated Jul 2024

Claude 3 OpusvsLlama 3.1 405B

Llama 3.1 405B is cheaper than Claude 3 Opus at $2.7/M vs $15/M input tokens.

Claude 3 Opus and Llama 3.1 405B compared across 7 shared prompts
Spec	Claude 3 Opus	Llama 3.1 405B
Input price	$15/M tokens	$2.7/M tokens
Output price	$75/M tokens	$3.1/M tokens
Context window	200K tokens	128K tokens
Parameters	Not disclosed	405B
Weights	—	Open
Free API (OpenRouter)	No	No
Released	Mar 2024	Jul 2024
MMLU	86.8%	88.6%

Our Verdict

Claude 3 Opus

Llama 3.1 405B

Not enough votes to call it. On the specs, nothing separates them.

Llama 3.1 405B costs 24x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

Llama 3.1 405B

Input

$2.70

5.6× cheaper

Output

$3.10

24× cheaper

Llama 3.1 405B is cheaper on both: 5.6× input, 24× output.

Writing DNA

Style Comparison

Similarity

60%

Llama 3.1 405B uses 2.9x more emoji

Claude 3 Opus

Llama 3.1 405B

54%Vocabulary55%

14wSentence Length15w

0.48Hedging0.41

0.0Bold0.0

3.0Lists1.9

0.00Emoji0.03

0.00Headings0.00

0.06Transitions0.16

Based on 3 + 5 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

Style Comparison

What we learned reading every model

Common questions

What is the difference between Claude 3 Opus and Llama 3.1 405B?

Which is better, Claude 3 Opus or Llama 3.1 405B?

How much does Claude 3 Opus cost compared to Llama 3.1 405B?

How can I compare Claude 3 Opus and Llama 3.1 405B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

Style Comparison

What we learned reading every model

Common questions

What is the difference between Claude 3 Opus and Llama 3.1 405B?

Which is better, Claude 3 Opus or Llama 3.1 405B?

How much does Claude 3 Opus cost compared to Llama 3.1 405B?

How can I compare Claude 3 Opus and Llama 3.1 405B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages