benchlm.ai

Claude Haiku 4.5 vs GPT-4o

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 56 (1 point difference).Claude Haiku 4.5 wins 4 out of 4 categories.

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

GPT-4o

CreatorOpenAI
TypeProprietary
Context128K
Score56

Knowledge

Claude Haiku 4.5

Claude Haiku 4.5

65.8

GPT-4o

64.5

68
MMLU
66
67
GPQA
66
65
SuperGPQA
64
63
OpenBookQA
62

Coding

Claude Haiku 4.5

Claude Haiku 4.5

60

GPT-4o

58

60
HumanEval
58

Mathematics

Claude Haiku 4.5

Claude Haiku 4.5

67

GPT-4o

65

68
AIME 2023
66
70
AIME 2024
68
69
AIME 2025
67
64
HMMT Feb 2023
62
66
HMMT Feb 2024
64
65
HMMT Feb 2025
63
67
BRUMO 2025
65

Reasoning

Claude Haiku 4.5

Claude Haiku 4.5

64

GPT-4o

63

65
SimpleQA
64
63
MuSR
62

Frequently Asked Questions

Which is better, Claude Haiku 4.5 or GPT-4o?

Claude Haiku 4.5 scores higher overall with 57 vs 56, a difference of 1 points across all benchmarks.

Which is better for knowledge tasks, Claude Haiku 4.5 or GPT-4o?

Claude Haiku 4.5 leads in knowledge tasks with an average score of 65.8 vs 64.5.

Which is better for coding, Claude Haiku 4.5 or GPT-4o?

Claude Haiku 4.5 leads in coding with an average score of 60 vs 58.

Which is better for math, Claude Haiku 4.5 or GPT-4o?

Claude Haiku 4.5 leads in math with an average score of 67 vs 65.

Which is better for reasoning, Claude Haiku 4.5 or GPT-4o?

Claude Haiku 4.5 leads in reasoning with an average score of 64 vs 63.

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