Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Claude 4 Sonnet is clearly ahead on the aggregate, 67 to 56. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude 4 Sonnet's sharpest advantage is in coding, where it averages 50.7 against 49.3. The single biggest benchmark swing on the page is MMLU, 73 to 86.9. o3-mini does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
o3-mini is the reasoning model in the pair, while Claude 4 Sonnet is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.
Pick Claude 4 Sonnet if you want the stronger benchmark profile. o3-mini only becomes the better choice if knowledge is the priority or you want the stronger reasoning-first profile.
Claude 4 Sonnet
62.2
o3-mini
82.1
Claude 4 Sonnet
50.7
o3-mini
49.3
Claude 4 Sonnet
73.1
o3-mini
87.3
Claude 4 Sonnet
83
o3-mini
93.9
Claude 4 Sonnet is ahead overall, 67 to 56. The biggest single separator in this matchup is MMLU, where the scores are 73 and 86.9.
o3-mini has the edge for knowledge tasks in this comparison, averaging 82.1 versus 62.2. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for coding in this comparison, averaging 50.7 versus 49.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
o3-mini has the edge for math in this comparison, averaging 87.3 versus 73.1. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.
o3-mini has the edge for instruction following in this comparison, averaging 93.9 versus 83. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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