Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
o3-pro is clearly ahead on the aggregate, 71 to 56. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
o3-pro's sharpest advantage is in mathematics, where it averages 89 against 67.1. The single biggest benchmark swing on the page is AIME 2023, 90 to 64.
Seed 1.6 Flash gives you the larger context window at 256K, compared with 200K for o3-pro.
Pick o3-pro if you want the stronger benchmark profile. Seed 1.6 Flash only becomes the better choice if you need the larger 256K context window.
o3-pro
70.4
Seed 1.6 Flash
54.5
o3-pro
49.2
Seed 1.6 Flash
27.6
o3-pro
74.1
Seed 1.6 Flash
73.1
o3-pro
83.6
Seed 1.6 Flash
66.8
o3-pro
67.1
Seed 1.6 Flash
47.3
o3-pro
82
Seed 1.6 Flash
81
o3-pro
81.1
Seed 1.6 Flash
72.8
o3-pro
89
Seed 1.6 Flash
67.1
o3-pro is ahead overall, 71 to 56. The biggest single separator in this matchup is AIME 2023, where the scores are 90 and 64.
o3-pro has the edge for knowledge tasks in this comparison, averaging 67.1 versus 47.3. Inside this category, GPQA is the benchmark that creates the most daylight between them.
o3-pro has the edge for coding in this comparison, averaging 49.2 versus 27.6. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
o3-pro has the edge for math in this comparison, averaging 89 versus 67.1. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
o3-pro has the edge for reasoning in this comparison, averaging 83.6 versus 66.8. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
o3-pro has the edge for agentic tasks in this comparison, averaging 70.4 versus 54.5. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
o3-pro has the edge for multimodal and grounded tasks in this comparison, averaging 74.1 versus 73.1. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.
o3-pro has the edge for instruction following in this comparison, averaging 82 versus 81. Inside this category, IFEval is the benchmark that creates the most daylight between them.
o3-pro has the edge for multilingual tasks in this comparison, averaging 81.1 versus 72.8. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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