# Llama 3.1 405B Instruct vs O3 Mini

As of Oct 14, 2026, Llama 3.1 405B Instruct leads O3 Mini in 1 of 2 shared categories: General LLM.

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

O3 Mini: $1.9250000000000003 per 1M blended tokens.

Llama 3.1 405B Instruct: open weights.

O3 Mini: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads O3 Mini in General LLM at #3 against #7.
- Which to pick, Science: As of Oct 14, 2026, O3 Mini leads Llama 3.1 405B Instruct in Science at #76 against #124.

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, O3 Mini is a former state-of-the-art holder in Reasoning (since Feb 9, 2025; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).