benchlm.ai

o4-mini (high) vs Z-1

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

Quick Verdict

o4-mini (high) wins overall with a score of 65 vs 43 (22 point difference).o4-mini (high) wins 4 out of 4 categories.

o4-mini (high)

CreatorOpenAI
TypeProprietary
Context200K
Score65

Z-1

CreatorZ
TypeProprietary
Context128K
Score43

Knowledge

o4-mini (high)

o4-mini (high)

80.5

Z-1

49.8

82
MMLU
52
82
GPQA
51
80
SuperGPQA
49
78
OpenBookQA
47

Coding

o4-mini (high)

o4-mini (high)

74

Z-1

44

74
HumanEval
44

Mathematics

o4-mini (high)

o4-mini (high)

82

Z-1

51

83
AIME 2023
52
85
AIME 2024
54
84
AIME 2025
53
79
HMMT Feb 2023
48
81
HMMT Feb 2024
50
80
HMMT Feb 2025
49
82
BRUMO 2025
51

Reasoning

o4-mini (high)

o4-mini (high)

79

Z-1

49

80
SimpleQA
50
78
MuSR
48

Frequently Asked Questions

Which is better, o4-mini (high) or Z-1?

o4-mini (high) scores higher overall with 65 vs 43, a difference of 22 points across all benchmarks.

Which is better for knowledge tasks, o4-mini (high) or Z-1?

o4-mini (high) leads in knowledge tasks with an average score of 80.5 vs 49.8.

Which is better for coding, o4-mini (high) or Z-1?

o4-mini (high) leads in coding with an average score of 74 vs 44.

Which is better for math, o4-mini (high) or Z-1?

o4-mini (high) leads in math with an average score of 82 vs 51.

Which is better for reasoning, o4-mini (high) or Z-1?

o4-mini (high) leads in reasoning with an average score of 79 vs 49.

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