benchlm.ai

Claude 4.1 Opus vs Z-1

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

Quick Verdict

Claude 4.1 Opus wins overall with a score of 61 vs 43 (18 point difference).Claude 4.1 Opus wins 4 out of 4 categories.

Claude 4.1 Opus

CreatorAnthropic
TypeProprietary
Context200K
Score61

Z-1

CreatorZ
TypeProprietary
Context128K
Score43

Knowledge

Claude 4.1 Opus

Claude 4.1 Opus

74.5

Z-1

49.8

76
MMLU
52
76
GPQA
51
74
SuperGPQA
49
72
OpenBookQA
47

Coding

Claude 4.1 Opus

Claude 4.1 Opus

68

Z-1

44

68
HumanEval
44

Mathematics

Claude 4.1 Opus

Claude 4.1 Opus

75

Z-1

51

76
AIME 2023
52
78
AIME 2024
54
77
AIME 2025
53
72
HMMT Feb 2023
48
74
HMMT Feb 2024
50
73
HMMT Feb 2025
49
75
BRUMO 2025
51

Reasoning

Claude 4.1 Opus

Claude 4.1 Opus

73

Z-1

49

74
SimpleQA
50
72
MuSR
48

Frequently Asked Questions

Which is better, Claude 4.1 Opus or Z-1?

Claude 4.1 Opus scores higher overall with 61 vs 43, a difference of 18 points across all benchmarks.

Which is better for knowledge tasks, Claude 4.1 Opus or Z-1?

Claude 4.1 Opus leads in knowledge tasks with an average score of 74.5 vs 49.8.

Which is better for coding, Claude 4.1 Opus or Z-1?

Claude 4.1 Opus leads in coding with an average score of 68 vs 44.

Which is better for math, Claude 4.1 Opus or Z-1?

Claude 4.1 Opus leads in math with an average score of 75 vs 51.

Which is better for reasoning, Claude 4.1 Opus or Z-1?

Claude 4.1 Opus leads in reasoning with an average score of 73 vs 49.

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