# Claude Fable 5.1 vs GLM 4.5

As of Oct 15, 2026, Claude Fable 5.1 leads GLM 4.5 in 4 of 4 shared categories: General LLM, Reasoning, Math, and Long context.

Claude Fable 5.1: $20 per 1M blended tokens.

GLM 4.5: $1 per 1M blended tokens.

Claude Fable 5.1: closed weights.

GLM 4.5: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads GLM 4.5 in General LLM at #6 against #138.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads GLM 4.5 in Reasoning at #5 against #129.
- Which to pick, Math: As of Oct 15, 2026, Claude Fable 5.1 leads GLM 4.5 in Math at #2 against #31.
- Which to pick, Long context: As of Oct 15, 2026, Claude Fable 5.1 leads GLM 4.5 in Long context at #6 against #137.

As of Oct 15, 2026, Claude Fable 5.1 is tied for state of the art in Factuality (since Oct 2, 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).