Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Aion-2.0 is clearly ahead on the aggregate, 58 to 53. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Aion-2.0's sharpest advantage is in instruction following, where it averages 93 against 80. The single biggest benchmark swing on the page is OpenBookQA, 75 to 57. Seed-2.0-Mini does hit back in multimodal & grounded, so the answer changes if that is the part of the workload you care about most.
Aion-2.0 is also the more expensive model on tokens at $0.80 input / $1.60 output per 1M tokens, versus $0.10 input / $0.40 output per 1M tokens for Seed-2.0-Mini. That is roughly 4.0x on output cost alone. Seed-2.0-Mini gives you the larger context window at 256K, compared with 128K for Aion-2.0.
Pick Aion-2.0 if you want the stronger benchmark profile. Seed-2.0-Mini only becomes the better choice if multimodal & grounded is the priority or you want the cheaper token bill.
Aion-2.0
51.7
Seed-2.0-Mini
46.2
Aion-2.0
33.2
Seed-2.0-Mini
24.7
Aion-2.0
66
Seed-2.0-Mini
73.1
Aion-2.0
70.3
Seed-2.0-Mini
64.8
Aion-2.0
54
Seed-2.0-Mini
44.6
Aion-2.0
93
Seed-2.0-Mini
80
Aion-2.0
78.1
Seed-2.0-Mini
71.8
Aion-2.0
72.1
Seed-2.0-Mini
65.1
Aion-2.0 is ahead overall, 58 to 53. The biggest single separator in this matchup is OpenBookQA, where the scores are 75 and 57.
Aion-2.0 has the edge for knowledge tasks in this comparison, averaging 54 versus 44.6. Inside this category, OpenBookQA is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for coding in this comparison, averaging 33.2 versus 24.7. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for math in this comparison, averaging 72.1 versus 65.1. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for reasoning in this comparison, averaging 70.3 versus 64.8. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for agentic tasks in this comparison, averaging 51.7 versus 46.2. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
Seed-2.0-Mini has the edge for multimodal and grounded tasks in this comparison, averaging 73.1 versus 66. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for instruction following in this comparison, averaging 93 versus 80. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for multilingual tasks in this comparison, averaging 78.1 versus 71.8. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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