# GPT-5.6 Terra vs Llama 3.1 405B Instruct

As of Oct 14, 2026, GPT-5.6 Terra leads Llama 3.1 405B Instruct in 1 of 2 shared categories: Science.

GPT-5.6 Terra: $4.5 per 1M blended tokens.

Llama 3.1 405B Instruct: price per 1M tokens is unset in the catalog.

GPT-5.6 Terra: closed weights.

Llama 3.1 405B Instruct: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, Llama 3.1 405B Instruct leads GPT-5.6 Terra in General LLM at #3 against #35.
- Which to pick, Science: As of Oct 14, 2026, GPT-5.6 Terra leads Llama 3.1 405B Instruct in Science at #15 against #124.

As of Oct 14, 2026, GPT-5.6 Terra is ranked #4 in Abstraction (ARC) (since Oct 14, 2026; sources ARC-AGI; methodology v1.0).

As of Oct 14, 2026, Llama 3.1 405B Instruct is a former state-of-the-art holder in General LLM (since Aug 28, 2024; sources LMArena Text (style-controlled, overall); methodology v1.0).