# Claude Opus 5 vs GLM 4.5

As of Oct 15, 2026, Claude Opus 5 leads GLM 4.5 in 3 of 3 shared categories: General LLM, Reasoning, and Long context.

Claude Opus 5: $10 per 1M blended tokens.

GLM 4.5: $1 per 1M blended tokens.

Claude Opus 5: closed weights.

GLM 4.5: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5 leads GLM 4.5 in General LLM at #11 against #138.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5 leads GLM 4.5 in Reasoning at #9 against #129.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5 leads GLM 4.5 in Long context at #9 against #137.

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 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).