GPT-5.1 vs Llama 3.1 405B Instruct
As of Oct 14, 2026, GPT-5.1 leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
GPT-5.1
#18 Best current rank: #18 in Math, as of Oct 14, 2026.
Llama 3.1 405B Instruct
It used to be. Was SOTA in General LLM.
| Category | GPT-5.1 | Llama 3.1 405B Instruct |
|---|---|---|
| General LLM | #47 · #47 in General LLM Margin 31.972789115646265 LMArena leaderboard dataset · Oct 13, 2026 | #3 · #3 in General LLM Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Reasoning | #48 · #48 in Reasoning Margin 33.56164383561644 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Math | #18 · #18 in Math Margin 37.77777777777778 Epoch AI benchmarking hub · Nov 13, 2025 | — |
| Science | #48 · #48 in Science Margin — Epoch AI benchmarking hub · Nov 13, 2025 | #124 · #124 in Science Margin — Epoch AI benchmarking hub · Jul 23, 2024 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 13, 2025 | — |
| Coding › Web dev | #75 · #75 in Coding › Web dev Margin 69.1588785046729 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #54 · #54 in Long context Margin 36.73469387755103 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #37 · #37 in Factuality Margin 28.358208955223887 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #31 · #31 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 13, 2025 | — |
GPT-5.1: $3.4375000000000004 per 1M blended tokens.
Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.
GPT-5.1: closed weights.
Llama 3.1 405B Instruct: open weights.
General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads GPT-5.1 in General LLM at #3 against #47.
Science: As of Oct 14, 2026, GPT-5.1 leads Llama 3.1 405B Instruct in Science at #48 against #124.
GPT-5.1 · Llama 3.1 405B Instruct
GPT-5.1 or Llama 3.1 405B Instruct?
As of Oct 14, 2026, GPT-5.1 leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
GPT-5.1 or Llama 3.1 405B Instruct for General LLM?
As of Oct 14, 2026, Llama 3.1 405B Instruct leads GPT-5.1 in General LLM at #3 against #47.
GPT-5.1 or Llama 3.1 405B Instruct for Science?
As of Oct 14, 2026, GPT-5.1 leads Llama 3.1 405B Instruct in Science at #48 against #124.