benchlm.ai

GLM-4.5-Air vs GPT-5.1-Codex-Max

Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.

Quick Verdict

GPT-5.1-Codex-Max wins overall with a score of 77 vs 26 (51 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

GLM-4.5-Air

CreatorTsinghua
TypeProprietary
Context128K
Score26

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

GLM-4.5-Air

32.8

GPT-5.1-Codex-Max

95

35
MMLU
98
34
GPQA
96
32
SuperGPQA
94
30
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

GLM-4.5-Air

27

GPT-5.1-Codex-Max

94

27
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

GLM-4.5-Air

34

GPT-5.1-Codex-Max

97.1

35
AIME 2023
99
37
AIME 2024
99
36
AIME 2025
98
31
HMMT Feb 2023
95
33
HMMT Feb 2024
97
32
HMMT Feb 2025
96
34
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

GLM-4.5-Air

32

GPT-5.1-Codex-Max

93

33
SimpleQA
94
31
MuSR
92

Frequently Asked Questions

Which is better, GLM-4.5-Air or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 26, a difference of 51 points across all benchmarks.

Which is better for knowledge tasks, GLM-4.5-Air or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 32.8.

Which is better for coding, GLM-4.5-Air or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 27.

Which is better for math, GLM-4.5-Air or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 34.

Which is better for reasoning, GLM-4.5-Air or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 32.

Related Comparisons

GLM-4.5-Air vs GPT-5.4GLM-4.5-Air vs Gemini 3.1 ProGLM-4.5-Air vs Claude Opus 4.6GLM-4.5-Air vs GPT-5.3 CodexGLM-4.5-Air vs Grok 4.1GLM-4.5-Air vs GPT-5.2