# Claude Opus 4.5 vs GPT-5.6 Terra

As of Oct 14, 2026, Claude Opus 4.5 leads GPT-5.6 Terra in 3 of 7 shared categories: General LLM, Reasoning, and Long context.

Claude Opus 4.5: $10 per 1M blended tokens.

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

Claude Opus 4.5: closed weights.

GPT-5.6 Terra: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 4.5 leads GPT-5.6 Terra in General LLM at #33 against #35.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 4.5 leads GPT-5.6 Terra in Reasoning at #28 against #35.
- Which to pick, Science: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.5 in Science at #15 against #68.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.5 in Coding › Web dev at #42 against #53.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 4.5 leads GPT-5.6 Terra in Long context at #19 against #46.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.5 in Factuality at #24 against #36.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.5 in Abstraction (ARC) at #4 against #49.

As of Oct 14, 2026, Claude Opus 4.5 is a former state-of-the-art holder in Reasoning (since Dec 1, 2025; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

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).