# GLM 4.5 Air vs GPT-5.5

As of Oct 15, 2026, GLM 4.5 Air leads GPT-5.5 in 0 of 4 shared categories.

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

GPT-5.5: $11.25 per 1M blended tokens.

GLM 4.5 Air: open weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads GLM 4.5 Air in General LLM at #21 against #142.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads GLM 4.5 Air in Reasoning at #25 against #140.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads GLM 4.5 Air in Long context at #23 against #138.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads GLM 4.5 Air in Factuality at #5 against #109.

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).

As of Oct 15, 2026, GPT-5.5 is a former state-of-the-art holder in General LLM (since Apr 28, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).