# Claude Opus 4.6 vs GPT-5.6 Terra

As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

Claude Opus 4.6: $10 per 1M blended tokens.

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

Claude Opus 4.6: closed weights.

GPT-5.6 Terra: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in General LLM at #4 against #35.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Reasoning at #2 against #35.
- Which to pick, Science: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.6 in Science at #15 against #32.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Coding › Web dev at #35 against #42.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Long context at #2 against #46.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Factuality at #3 against #24.

As of Oct 14, 2026, Claude Opus 4.6 is near state of the art, rank #2 in Reasoning (since Oct 14, 2026; 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).