# Claude Sonnet 5.5 vs GLM 5.2

As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 5.2 in 5 of 6 shared categories: Reasoning, Science, Coding › Web dev, Long context, and Factuality.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

GLM 5.2: $1.7799999999999998 per 1M blended tokens.

Claude Sonnet 5.5: closed weights.

GLM 5.2: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, GLM 5.2 leads Claude Sonnet 5.5 in General LLM at #26 against #27.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 5.2 in Reasoning at #18 against #30.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 5.2 in Science at #3 against #23.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 5.2 in Coding › Web dev at #3 against #23.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 5.2 in Long context at #11 against #25.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 5.2 in Factuality at #16 against #31.

As of Oct 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).

As of Oct 15, 2026, GLM 5.2 is a former state-of-the-art holder in Coding › Web dev (since Jun 18, 2026; sources LMArena WebDev; methodology v1.0).