# Claude Opus 5.5 vs GLM 5

As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

GLM 5: $1.55 per 1M blended tokens.

Claude Opus 5.5: closed weights.

GLM 5: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in General LLM at #2 against #56.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in Reasoning at #1 against #59.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in Science at #31 against #47.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in Coding › Web dev at #1 against #68.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in Long context at #1 against #55.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in Factuality at #1 against #55.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 leads GLM 5 in Abstraction (ARC) at #1 against #47.

As of Oct 15, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, GLM 5 is a former state-of-the-art holder in Coding › Web dev (since Apr 2, 2026; sources LMArena WebDev; methodology v1.0).