Claude 3.5 Sonnet vs GPT-4o mini

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

Claude 3.5 Sonnet is clearly ahead on the aggregate, 62 to 43. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude 3.5 Sonnet gives you the larger context window at 200K, compared with 128K for GPT-4o mini.

Quick Verdict

Pick Claude 3.5 Sonnet 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 3.5 Sonnet

55.5

GPT-4o mini

82

65
MMLU
82
65
GPQA
-
63
SuperGPQA
-
61
OpenBookQA
-
74
MMLU-Pro
-
5
HLE
-

Coding

GPT-4o mini

Claude 3.5 Sonnet

44

GPT-4o mini

87.2

57
HumanEval
87.2
36
SWE-bench Verified
-
39
LiveCodeBench
-

Mathematics

Claude 3.5 Sonnet
65
AIME 2023
-
67
AIME 2024
-
66
AIME 2025
-
61
HMMT Feb 2023
-
63
HMMT Feb 2024
-
62
HMMT Feb 2025
-
64
BRUMO 2025
-
80
MATH-500
-

Reasoning

Claude 3.5 Sonnet
63
SimpleQA
-
61
MuSR
-
83
BBH
-

Instruction Following

Claude 3.5 Sonnet
83
IFEval
-

Multilingual

GPT-4o mini

Claude 3.5 Sonnet

85

GPT-4o mini

87

85
MGSM
87

Frequently Asked Questions

Which is better, Claude 3.5 Sonnet or GPT-4o mini?

Claude 3.5 Sonnet is ahead overall, 62 to 43. The biggest single separator in this matchup is HumanEval, where the scores are 57 and 87.2.

Which is better for knowledge tasks, Claude 3.5 Sonnet or GPT-4o mini?

GPT-4o mini has the edge for knowledge tasks in this comparison, averaging 82 versus 55.5. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, Claude 3.5 Sonnet or GPT-4o mini?

GPT-4o mini has the edge for coding in this comparison, averaging 87.2 versus 44. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Claude 3.5 Sonnet or GPT-4o mini?

GPT-4o mini has the edge for multilingual tasks in this comparison, averaging 87 versus 85. Inside this category, MGSM is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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