# Claude Sonnet 5.5 vs GLM 4.5 Air

As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 4.5 Air in 5 of 5 shared categories: General LLM, Reasoning, Math, Long context, and Factuality.

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

GLM 4.5 Air: $0.31 per 1M blended tokens.

Claude Sonnet 5.5: closed weights.

GLM 4.5 Air: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 4.5 Air in General LLM at #29 against #183.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 4.5 Air in Reasoning at #18 against #181.
- Which to pick, Math: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 4.5 Air in Math at #4 against #32.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 4.5 Air in Long context at #11 against #179.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads GLM 4.5 Air in Factuality at #17 against #145.

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 4.5 Air is ranked #32 in Math (since Oct 15, 2026; sources Humanity's Last Exam; methodology v1.0).