benchlm.ai

Claude 4.1 Opus Thinking 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 29 (28 point difference).Claude Haiku 4.5 wins 4 out of 4 categories.

Claude 4.1 Opus Thinking

CreatorAnthropic
TypeProprietary
Context200K
Score29

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

Knowledge

Claude Haiku 4.5

Claude 4.1 Opus Thinking

35.8

Claude Haiku 4.5

65.8

38
MMLU
68
37
GPQA
67
35
SuperGPQA
65
33
OpenBookQA
63

Coding

Claude Haiku 4.5

Claude 4.1 Opus Thinking

30

Claude Haiku 4.5

60

30
HumanEval
60

Mathematics

Claude Haiku 4.5

Claude 4.1 Opus Thinking

37

Claude Haiku 4.5

67

38
AIME 2023
68
40
AIME 2024
70
39
AIME 2025
69
34
HMMT Feb 2023
64
36
HMMT Feb 2024
66
35
HMMT Feb 2025
65
37
BRUMO 2025
67

Reasoning

Claude Haiku 4.5

Claude 4.1 Opus Thinking

35

Claude Haiku 4.5

64

36
SimpleQA
65
34
MuSR
63

Frequently Asked Questions

Which is better, Claude 4.1 Opus Thinking or Claude Haiku 4.5?

Claude Haiku 4.5 scores higher overall with 57 vs 29, a difference of 28 points across all benchmarks.

Which is better for knowledge tasks, Claude 4.1 Opus Thinking or Claude Haiku 4.5?

Claude Haiku 4.5 leads in knowledge tasks with an average score of 65.8 vs 35.8.

Which is better for coding, Claude 4.1 Opus Thinking or Claude Haiku 4.5?

Claude Haiku 4.5 leads in coding with an average score of 60 vs 30.

Which is better for math, Claude 4.1 Opus Thinking or Claude Haiku 4.5?

Claude Haiku 4.5 leads in math with an average score of 67 vs 37.

Which is better for reasoning, Claude 4.1 Opus Thinking or Claude Haiku 4.5?

Claude Haiku 4.5 leads in reasoning with an average score of 64 vs 35.

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