benchlm.ai

Claude 3 Opus vs Claude Haiku 4.5

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

Quick Verdict

Claude Haiku 4.5 wins overall with a score of 57 vs 51 (6 point difference).Claude Haiku 4.5 wins 4 out of 4 categories.

Claude 3 Opus

CreatorAnthropic
TypeProprietary
Context200K
Score51

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

Knowledge

Claude Haiku 4.5

Claude 3 Opus

59.5

Claude Haiku 4.5

65.8

61
MMLU
68
61
GPQA
67
59
SuperGPQA
65
57
OpenBookQA
63

Coding

Claude Haiku 4.5

Claude 3 Opus

53

Claude Haiku 4.5

60

53
HumanEval
60

Mathematics

Claude Haiku 4.5

Claude 3 Opus

60

Claude Haiku 4.5

67

61
AIME 2023
68
63
AIME 2024
70
62
AIME 2025
69
57
HMMT Feb 2023
64
59
HMMT Feb 2024
66
58
HMMT Feb 2025
65
60
BRUMO 2025
67

Reasoning

Claude Haiku 4.5

Claude 3 Opus

58

Claude Haiku 4.5

64

59
SimpleQA
65
57
MuSR
63

Frequently Asked Questions

Which is better, Claude 3 Opus or Claude Haiku 4.5?

Claude Haiku 4.5 scores higher overall with 57 vs 51, a difference of 6 points across all benchmarks.

Which is better for knowledge tasks, Claude 3 Opus or Claude Haiku 4.5?

Claude Haiku 4.5 leads in knowledge tasks with an average score of 65.8 vs 59.5.

Which is better for coding, Claude 3 Opus or Claude Haiku 4.5?

Claude Haiku 4.5 leads in coding with an average score of 60 vs 53.

Which is better for math, Claude 3 Opus or Claude Haiku 4.5?

Claude Haiku 4.5 leads in math with an average score of 67 vs 60.

Which is better for reasoning, Claude 3 Opus or Claude Haiku 4.5?

Claude Haiku 4.5 leads in reasoning with an average score of 64 vs 58.

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