Claude 3 Opus vs Llama 3.1 405B
Compare Claude 3 Opus by Anthropic against Llama 3.1 405B by Meta AI, context windows of 200K vs 128K, tested across 7 shared challenges. Updated May 2026.
Which is better, Claude 3 Opus or Llama 3.1 405B?
Claude 3 Opus and Llama 3.1 405B are both competitive models. Claude 3 Opus costs $15/M input tokens vs $2.7/M for Llama 3.1 405B. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Opus and Llama 3.1 405B
Claude 3 Opus is made by anthropic while Llama 3.1 405B is from meta. Claude 3 Opus has a 200K token context window compared to Llama 3.1 405B's 128K. On pricing, Claude 3 Opus costs $15/M input tokens vs $2.7/M for Llama 3.1 405B.
Per 1M tokens
Llama 3.1 405B is cheaper on both — 5.6× input, 24× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Llama 3.1 405B is 24x cheaper per token — worth considering if cost matters.
Style Comparison
Llama 3.1 405B uses 2.9x more emoji
