benchlm.ai

GLM-4.5 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 28 (49 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

GLM-4.5

CreatorTsinghua
TypeProprietary
Context128K
Score28

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

GLM-4.5

34.8

GPT-5.1-Codex-Max

95

37
MMLU
98
36
GPQA
96
34
SuperGPQA
94
32
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

GLM-4.5

29

GPT-5.1-Codex-Max

94

29
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

GLM-4.5

36

GPT-5.1-Codex-Max

97.1

37
AIME 2023
99
39
AIME 2024
99
38
AIME 2025
98
33
HMMT Feb 2023
95
35
HMMT Feb 2024
97
34
HMMT Feb 2025
96
36
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

GLM-4.5

34

GPT-5.1-Codex-Max

93

35
SimpleQA
94
33
MuSR
92

Frequently Asked Questions

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

GPT-5.1-Codex-Max scores higher overall with 77 vs 28, a difference of 49 points across all benchmarks.

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

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 34.8.

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

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 29.

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

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 36.

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

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 34.

Related Comparisons

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