benchlm.ai

Claude Haiku 4.5 vs GPT-5 mini

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

Quick Verdict

GPT-5 mini wins overall with a score of 68 vs 57 (11 point difference).GPT-5 mini wins 4 out of 4 categories.

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Knowledge

GPT-5 mini

Claude Haiku 4.5

65.8

GPT-5 mini

85

68
MMLU
88
67
GPQA
86
65
SuperGPQA
84
63
OpenBookQA
82

Coding

GPT-5 mini

Claude Haiku 4.5

60

GPT-5 mini

80

60
HumanEval
80

Mathematics

GPT-5 mini

Claude Haiku 4.5

67

GPT-5 mini

89

68
AIME 2023
90
70
AIME 2024
92
69
AIME 2025
91
64
HMMT Feb 2023
86
66
HMMT Feb 2024
88
65
HMMT Feb 2025
87
67
BRUMO 2025
89

Reasoning

GPT-5 mini

Claude Haiku 4.5

64

GPT-5 mini

83

65
SimpleQA
84
63
MuSR
82

Frequently Asked Questions

Which is better, Claude Haiku 4.5 or GPT-5 mini?

GPT-5 mini scores higher overall with 68 vs 57, a difference of 11 points across all benchmarks.

Which is better for knowledge tasks, Claude Haiku 4.5 or GPT-5 mini?

GPT-5 mini leads in knowledge tasks with an average score of 85 vs 65.8.

Which is better for coding, Claude Haiku 4.5 or GPT-5 mini?

GPT-5 mini leads in coding with an average score of 80 vs 60.

Which is better for math, Claude Haiku 4.5 or GPT-5 mini?

GPT-5 mini leads in math with an average score of 89 vs 67.

Which is better for reasoning, Claude Haiku 4.5 or GPT-5 mini?

GPT-5 mini leads in reasoning with an average score of 83 vs 64.

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