Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Aion-2.0 has the cleaner overall profile here, landing at 58 versus 56. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Aion-2.0's sharpest advantage is in instruction following, where it averages 93 against 82. The single biggest benchmark swing on the page is SWE-bench Verified, 35 to 20. GPT-4o does hit back in multimodal & grounded, so the answer changes if that is the part of the workload you care about most.
GPT-4o is also the more expensive model on tokens at $2.50 input / $10.00 output per 1M tokens, versus $0.80 input / $1.60 output per 1M tokens for Aion-2.0. That is roughly 6.3x on output cost alone.
Pick Aion-2.0 if you want the stronger benchmark profile. GPT-4o only becomes the better choice if multimodal & grounded is the priority.
Aion-2.0
51.7
GPT-4o
51.2
Aion-2.0
33.2
GPT-4o
32.2
Aion-2.0
66
GPT-4o
72.2
Aion-2.0
70.3
GPT-4o
64.6
Aion-2.0
54
GPT-4o
47.4
Aion-2.0
93
GPT-4o
82
Aion-2.0
78.1
GPT-4o
75.5
Aion-2.0
72.1
GPT-4o
71.8
Aion-2.0 is ahead overall, 58 to 56. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 35 and 20.
Aion-2.0 has the edge for knowledge tasks in this comparison, averaging 54 versus 47.4. 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 32.2. 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 71.8. Inside this category, MATH-500 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 64.6. 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 51.2. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.
GPT-4o has the edge for multimodal and grounded tasks in this comparison, averaging 72.2 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 82. 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 75.5. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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