Claude 3 Haiku vs GPT-4o mini

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

Claude 3 Haiku is clearly ahead on the aggregate, 51 to 43. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude 3 Haiku gives you the larger context window at 200K, compared with 128K for GPT-4o mini.

Quick Verdict

Pick Claude 3 Haiku if you want the stronger benchmark profile. GPT-4o mini only becomes the better choice if coding is the priority.

Knowledge

GPT-4o mini

Claude 3 Haiku

47.2

GPT-4o mini

82

56
MMLU
82
56
GPQA
-
54
SuperGPQA
-
52
OpenBookQA
-
63
MMLU-Pro
-
2
HLE
-

Coding

GPT-4o mini

Claude 3 Haiku

28.3

GPT-4o mini

87.2

48
HumanEval
87.2
17
SWE-bench Verified
-
20
LiveCodeBench
-

Mathematics

Claude 3 Haiku
56
AIME 2023
-
58
AIME 2024
-
57
AIME 2025
-
52
HMMT Feb 2023
-
54
HMMT Feb 2024
-
53
HMMT Feb 2025
-
55
BRUMO 2025
-
71
MATH-500
-

Reasoning

Claude 3 Haiku
54
SimpleQA
-
52
MuSR
-
74
BBH
-

Instruction Following

Claude 3 Haiku
76
IFEval
-

Multilingual

GPT-4o mini

Claude 3 Haiku

73

GPT-4o mini

87

73
MGSM
87

Frequently Asked Questions

Which is better, Claude 3 Haiku or GPT-4o mini?

Claude 3 Haiku is ahead overall, 51 to 43. The biggest single separator in this matchup is HumanEval, where the scores are 48 and 87.2.

Which is better for knowledge tasks, Claude 3 Haiku or GPT-4o mini?

GPT-4o mini has the edge for knowledge tasks in this comparison, averaging 82 versus 47.2. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, Claude 3 Haiku or GPT-4o mini?

GPT-4o mini has the edge for coding in this comparison, averaging 87.2 versus 28.3. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Claude 3 Haiku or GPT-4o mini?

GPT-4o mini has the edge for multilingual tasks in this comparison, averaging 87 versus 73. Inside this category, MGSM is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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