GPT-4o vs Z-1

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

Quick Verdict

GPT-4o wins overall with a score of 56 vs 43 (13 point difference).GPT-4o wins 4 out of 4 categories.

Knowledge

GPT-4o

GPT-4o

64.5

Z-1

49.8

66
MMLU
52
66
GPQA
51
64
SuperGPQA
49
62
OpenBookQA
47

Coding

GPT-4o

GPT-4o

58

Z-1

44

58
HumanEval
44

Mathematics

GPT-4o

GPT-4o

65

Z-1

51

66
AIME 2023
52
68
AIME 2024
54
67
AIME 2025
53
62
HMMT Feb 2023
48
64
HMMT Feb 2024
50
63
HMMT Feb 2025
49
65
BRUMO 2025
51

Reasoning

GPT-4o

GPT-4o

63

Z-1

49

64
SimpleQA
50
62
MuSR
48

Frequently Asked Questions

Which is better, GPT-4o or Z-1?

GPT-4o scores higher overall with 56 vs 43, a difference of 13 points across all benchmarks.

Which is better for knowledge tasks, GPT-4o or Z-1?

GPT-4o leads in knowledge tasks with an average score of 64.5 vs 49.8.

Which is better for coding, GPT-4o or Z-1?

GPT-4o leads in coding with an average score of 58 vs 44.

Which is better for math, GPT-4o or Z-1?

GPT-4o leads in math with an average score of 65 vs 51.

Which is better for reasoning, GPT-4o or Z-1?

GPT-4o leads in reasoning with an average score of 63 vs 49.