# Llama 3.1 405B Instruct vs O1 Preview

As of Oct 14, 2026, Llama 3.1 405B Instruct leads O1 Preview in 2 of 2 shared categories: General LLM and Science.

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

O1 Preview: price per 1M tokens is unset in the catalog.

Llama 3.1 405B Instruct: open weights.

O1 Preview: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads O1 Preview in General LLM at #3 against #129.
- Which to pick, Science: As of Oct 14, 2026, Llama 3.1 405B Instruct leads O1 Preview in Science at #124 against #125.

As of Oct 14, 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).

As of Oct 14, 2026, O1 Preview is a former state-of-the-art holder in General LLM (since Sep 27, 2024; sources LMArena Text (style-controlled, overall); methodology v1.0).