DeepSeek V4.1 Flash vs Llama 3.1 405B Instruct
As of Oct 14, 2026, DeepSeek V4.1 Flash leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
Llama 3.1 405B Instruct
It used to be. Was SOTA in General LLM.
| Category | DeepSeek V4.1 Flash | Llama 3.1 405B Instruct |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #3 · #3 in General LLM Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Reasoning | #27 · #27 in Reasoning Margin 19.178082191780817 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 | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #124 · #124 in Science Margin — Epoch AI benchmarking hub · Jul 23, 2024 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | — |
| Coding › Web dev | #19 · #19 in Coding › Web dev Margin 16.822429906542055 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #32 · #32 in Long context Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Vision | #21 · #21 in Vision Margin 57.89473684210526 Epoch AI benchmarking hub · Sep 9, 2026 | — |
| Factuality | #22 · #22 in Factuality Margin 17.164179104477626 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 | — |
DeepSeek V4.1 Flash: $0.23463 per 1M blended tokens.
Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.
DeepSeek V4.1 Flash: open weights.
Llama 3.1 405B Instruct: open weights.
General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads DeepSeek V4.1 Flash in General LLM at #3 against #29.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Llama 3.1 405B Instruct in Science at #36 against #124.
DeepSeek V4.1 Flash · Llama 3.1 405B Instruct
DeepSeek V4.1 Flash or Llama 3.1 405B Instruct?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
DeepSeek V4.1 Flash or Llama 3.1 405B Instruct for General LLM?
As of Oct 14, 2026, Llama 3.1 405B Instruct leads DeepSeek V4.1 Flash in General LLM at #3 against #29.
DeepSeek V4.1 Flash or Llama 3.1 405B Instruct for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads Llama 3.1 405B Instruct in Science at #36 against #124.