benchlm.ai

GLM-5 (Reasoning) 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 75 (2 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

GLM-5 (Reasoning)

CreatorZhipu AI
TypeOpen Weight
Context200K
Score75

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

GLM-5 (Reasoning)

93

GPT-5.1-Codex-Max

95

96
MMLU
98
94
GPQA
96
92
SuperGPQA
94
90
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

GLM-5 (Reasoning)

88

GPT-5.1-Codex-Max

94

88
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

GLM-5 (Reasoning)

96.6

GPT-5.1-Codex-Max

97.1

98
AIME 2023
99
99
AIME 2024
99
98
AIME 2025
98
94
HMMT Feb 2023
95
96
HMMT Feb 2024
97
95
HMMT Feb 2025
96
96
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

GLM-5 (Reasoning)

91

GPT-5.1-Codex-Max

93

92
SimpleQA
94
90
MuSR
92

Frequently Asked Questions

Which is better, GLM-5 (Reasoning) or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 75, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, GLM-5 (Reasoning) or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 93.

Which is better for coding, GLM-5 (Reasoning) or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 88.

Which is better for math, GLM-5 (Reasoning) or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 96.6.

Which is better for reasoning, GLM-5 (Reasoning) or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 91.

Related Comparisons

GLM-5 (Reasoning) vs GPT-5.4GLM-5 (Reasoning) vs Gemini 3.1 ProGLM-5 (Reasoning) vs Claude Opus 4.6GLM-5 (Reasoning) vs GPT-5.3 CodexGLM-5 (Reasoning) vs Grok 4.1GLM-5 (Reasoning) vs GPT-5.2