Claude Sonnet 4.5 vs Llama 3.1 405B Instruct
As of Oct 14, 2026, Claude Sonnet 4.5 leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
Claude Sonnet 4.5
It used to be. Was SOTA in General LLM.
Llama 3.1 405B Instruct
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 4.5 | Llama 3.1 405B Instruct |
|---|---|---|
| General LLM | #49 · Was SOTA · General LLM Margin 33.33333333333333 LMArena leaderboard dataset · Oct 13, 2026 | #3 · #3 in General LLM Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Reasoning | #40 · Was SOTA · Reasoning Margin 28.082191780821915 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Math | #25 · #25 in Math Margin 53.333333333333336 Epoch AI benchmarking hub · Sep 29, 2025 | — |
| Science | #82 · #82 in Science Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #124 · #124 in Science Margin — Epoch AI benchmarking hub · Jul 23, 2024 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Sep 29, 2025 | — |
| Coding › Web dev | #78 · Was SOTA · Coding › Web dev Margin 71.96261682242991 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #29 · Was SOTA · Long context Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Factuality | #50 · #50 in Factuality Margin 38.059701492537314 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #66 · #66 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 29, 2025 | — |
Claude Sonnet 4.5: $6 per 1M blended tokens.
Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.
Claude Sonnet 4.5: closed weights.
Llama 3.1 405B Instruct: open weights.
General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads Claude Sonnet 4.5 in General LLM at #3 against #49.
Science: As of Oct 14, 2026, Claude Sonnet 4.5 leads Llama 3.1 405B Instruct in Science at #82 against #124.
Claude Sonnet 4.5 · Llama 3.1 405B Instruct
Claude Sonnet 4.5 or Llama 3.1 405B Instruct?
As of Oct 14, 2026, Claude Sonnet 4.5 leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
Claude Sonnet 4.5 or Llama 3.1 405B Instruct for General LLM?
As of Oct 14, 2026, Llama 3.1 405B Instruct leads Claude Sonnet 4.5 in General LLM at #3 against #49.
Claude Sonnet 4.5 or Llama 3.1 405B Instruct for Science?
As of Oct 14, 2026, Claude Sonnet 4.5 leads Llama 3.1 405B Instruct in Science at #82 against #124.