# Claude Opus 5.5 vs GLM 4.5

As of Oct 14, 2026, Claude Opus 5.5 leads GLM 4.5 in 3 of 3 shared categories: General LLM, Reasoning, and Long context.

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

GLM 4.5: $1 per 1M blended tokens.

Claude Opus 5.5: closed weights.

GLM 4.5: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads GLM 4.5 in General LLM at #2 against #107.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads GLM 4.5 in Reasoning at #1 against #99.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 5.5 leads GLM 4.5 in Long context at #1 against #103.

As of Oct 14, 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 14, 2026, GLM 4.5 is a former state-of-the-art holder in General LLM (since Aug 7, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).