Claude Sonnet 5 vs Llama 3.1 405B Instruct
As of Oct 15, 2026, Claude Sonnet 5 leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
Claude Sonnet 5
#19 Best current rank: #19 in Coding, as of Oct 15, 2026.
Llama 3.1 405B Instruct
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5 | Llama 3.1 405B Instruct |
|---|---|---|
| General LLM | #50 · #50 in General LLM Margin 26.59574468085107 LMArena leaderboard dataset · Oct 13, 2026 | #5 · #5 in General LLM Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Reasoning | #40 · #40 in Reasoning Margin 21.808510638297875 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | — |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Jun 30, 2026 | #124 · #124 in Science Margin — Epoch AI benchmarking hub · Jul 23, 2024 |
| Coding | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Agentic | #19 · #19 in Coding › Agentic Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #40 · #40 in Coding › Web dev Margin 31.200000000000003 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #36 · #36 in Long context Margin 19.148936170212764 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #56 · #56 in Factuality Margin 33.13953488372093 LMArena leaderboard dataset · Oct 13, 2026 | — |
Claude Sonnet 5: $4.000000000000001 per 1M blended tokens.
Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.
Claude Sonnet 5: closed weights.
Llama 3.1 405B Instruct: open weights.
General LLM: As of Oct 15, 2026, Llama 3.1 405B Instruct leads Claude Sonnet 5 in General LLM at #5 against #50.
Science: As of Oct 15, 2026, Claude Sonnet 5 leads Llama 3.1 405B Instruct in Science at #32 against #124.
Claude Sonnet 5 · Llama 3.1 405B Instruct
Claude Sonnet 5 or Llama 3.1 405B Instruct?
As of Oct 15, 2026, Claude Sonnet 5 leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
Claude Sonnet 5 or Llama 3.1 405B Instruct for General LLM?
As of Oct 15, 2026, Llama 3.1 405B Instruct leads Claude Sonnet 5 in General LLM at #5 against #50.
Claude Sonnet 5 or Llama 3.1 405B Instruct for Science?
As of Oct 15, 2026, Claude Sonnet 5 leads Llama 3.1 405B Instruct in Science at #32 against #124.