benchlm.ai

Claude Haiku 4.5 vs GPT-5 (medium)

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

Quick Verdict

GPT-5 (medium) wins overall with a score of 70 vs 57 (13 point difference).GPT-5 (medium) wins 4 out of 4 categories.

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Knowledge

GPT-5 (medium)

Claude Haiku 4.5

65.8

GPT-5 (medium)

88

68
MMLU
91
67
GPQA
89
65
SuperGPQA
87
63
OpenBookQA
85

Coding

GPT-5 (medium)

Claude Haiku 4.5

60

GPT-5 (medium)

83

60
HumanEval
83

Mathematics

GPT-5 (medium)

Claude Haiku 4.5

67

GPT-5 (medium)

92

68
AIME 2023
93
70
AIME 2024
95
69
AIME 2025
94
64
HMMT Feb 2023
89
66
HMMT Feb 2024
91
65
HMMT Feb 2025
90
67
BRUMO 2025
92

Reasoning

GPT-5 (medium)

Claude Haiku 4.5

64

GPT-5 (medium)

86

65
SimpleQA
87
63
MuSR
85

Frequently Asked Questions

Which is better, Claude Haiku 4.5 or GPT-5 (medium)?

GPT-5 (medium) scores higher overall with 70 vs 57, a difference of 13 points across all benchmarks.

Which is better for knowledge tasks, Claude Haiku 4.5 or GPT-5 (medium)?

GPT-5 (medium) leads in knowledge tasks with an average score of 88 vs 65.8.

Which is better for coding, Claude Haiku 4.5 or GPT-5 (medium)?

GPT-5 (medium) leads in coding with an average score of 83 vs 60.

Which is better for math, Claude Haiku 4.5 or GPT-5 (medium)?

GPT-5 (medium) leads in math with an average score of 92 vs 67.

Which is better for reasoning, Claude Haiku 4.5 or GPT-5 (medium)?

GPT-5 (medium) leads in reasoning with an average score of 86 vs 64.

Related Comparisons

Claude Haiku 4.5 vs GPT-5.4Claude Haiku 4.5 vs Gemini 3.1 ProClaude Haiku 4.5 vs Claude Opus 4.6Claude Haiku 4.5 vs GPT-5.3 CodexClaude Haiku 4.5 vs Grok 4.1Claude Haiku 4.5 vs GPT-5.2