GPT-5.5 Instant vs Llama 3.1 405B Instruct
As of Oct 14, 2026, GPT-5.5 Instant leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
GPT-5.5 Instant
#31 Best current rank: #31 in General LLM, as of Oct 14, 2026.
Llama 3.1 405B Instruct
It used to be. Was SOTA in General LLM.
| Category | GPT-5.5 Instant | Llama 3.1 405B Instruct |
|---|---|---|
| General LLM | #31 · #31 in General LLM Margin 21.088435374149654 LMArena leaderboard dataset · Oct 13, 2026 | #3 · #3 in General LLM Margin — LMArena leaderboard dataset · Sep 4, 2024 |
| Reasoning | #33 · #33 in Reasoning Margin 23.28767123287672 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 | #65 · #65 in Science Margin — Epoch AI benchmarking hub · May 5, 2026 | #124 · #124 in Science Margin — Epoch AI benchmarking hub · Jul 23, 2024 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #39 · #39 in Long context Margin 26.530612244897952 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #64 · #64 in Factuality Margin 48.507462686567166 LMArena leaderboard dataset · Oct 13, 2026 | — |
GPT-5.5 Instant: price per 1M tokens is unset in the catalog.
Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.
GPT-5.5 Instant: closed weights.
Llama 3.1 405B Instruct: open weights.
General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads GPT-5.5 Instant in General LLM at #3 against #31.
Science: As of Oct 14, 2026, GPT-5.5 Instant leads Llama 3.1 405B Instruct in Science at #65 against #124.
GPT-5.5 Instant · Llama 3.1 405B Instruct
GPT-5.5 Instant or Llama 3.1 405B Instruct?
As of Oct 14, 2026, GPT-5.5 Instant leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.
GPT-5.5 Instant or Llama 3.1 405B Instruct for General LLM?
As of Oct 14, 2026, Llama 3.1 405B Instruct leads GPT-5.5 Instant in General LLM at #3 against #31.
GPT-5.5 Instant or Llama 3.1 405B Instruct for Science?
As of Oct 14, 2026, GPT-5.5 Instant leads Llama 3.1 405B Instruct in Science at #65 against #124.