# Claude 3 Opus vs Llama 3.1 405B Instruct

As of Oct 15, 2026, Claude 3 Opus leads Llama 3.1 405B Instruct in 0 of 2 shared categories.

Claude 3 Opus: price per 1M tokens is unset in the catalog.

Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.

Claude 3 Opus: closed weights.

Llama 3.1 405B Instruct: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Llama 3.1 405B Instruct leads Claude 3 Opus in General LLM at #5 against #11.
- Which to pick, Science: As of Oct 15, 2026, Llama 3.1 405B Instruct leads Claude 3 Opus in Science at #124 against #138.

As of Oct 15, 2026, Claude 3 Opus is ranked #11 in General LLM (since Oct 15, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, Llama 3.1 405B Instruct is a former state-of-the-art holder in General LLM (since Aug 28, 2024; sources LMArena Text (style-controlled, overall); methodology v1.0).