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
It used to be. Was SOTA in General LLM.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Llama 3.1 405B Instruct | O3 Mini |
|---|---|---|
| General LLM | #3 · #3 in General LLM Margin — LMArena leaderboard dataset · Sep 4, 2024 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #— · Not enough data Margin — LMArena leaderboard dataset · Sep 4, 2024 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #124 · #124 in Science Margin — Epoch AI benchmarking hub · Jul 23, 2024 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | — | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Factuality | — | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | — | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
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.
General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads O3 Mini in General LLM at #3 against #7.
Science: As of Oct 14, 2026, O3 Mini leads Llama 3.1 405B Instruct in Science at #76 against #124.
Llama 3.1 405B Instruct · O3 Mini
Llama 3.1 405B Instruct or 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 or O3 Mini for General LLM?
As of Oct 14, 2026, Llama 3.1 405B Instruct leads O3 Mini in General LLM at #3 against #7.
Llama 3.1 405B Instruct or O3 Mini for Science?
As of Oct 14, 2026, O3 Mini leads Llama 3.1 405B Instruct in Science at #76 against #124.