Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Llama 3.1 405B finishes one point ahead overall, 59 to 58. That is enough to call, but not enough to treat as a blowout. This matchup comes down to a few meaningful edges rather than one model dominating the board.
Llama 3.1 405B's sharpest advantage is in coding, where it averages 40.6 against 33.2. The single biggest benchmark swing on the page is SWE-bench Verified, 46 to 35. Aion-2.0 does hit back in instruction following, so the answer changes if that is the part of the workload you care about most.
Pick Llama 3.1 405B if you want the stronger benchmark profile. Aion-2.0 only becomes the better choice if instruction following is the priority.
Llama 3.1 405B
53.9
Aion-2.0
51.7
Llama 3.1 405B
40.6
Aion-2.0
33.2
Llama 3.1 405B
62.3
Aion-2.0
66
Llama 3.1 405B
68.3
Aion-2.0
70.3
Llama 3.1 405B
53.2
Aion-2.0
54
Llama 3.1 405B
86
Aion-2.0
93
Llama 3.1 405B
80.1
Aion-2.0
78.1
Llama 3.1 405B
74.9
Aion-2.0
72.1
Llama 3.1 405B is ahead overall, 59 to 58. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 46 and 35.
Aion-2.0 has the edge for knowledge tasks in this comparison, averaging 54 versus 53.2. Inside this category, OpenBookQA is the benchmark that creates the most daylight between them.
Llama 3.1 405B has the edge for coding in this comparison, averaging 40.6 versus 33.2. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Llama 3.1 405B has the edge for math in this comparison, averaging 74.9 versus 72.1. 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 68.3. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
Llama 3.1 405B has the edge for agentic tasks in this comparison, averaging 53.9 versus 51.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Aion-2.0 has the edge for multimodal and grounded tasks in this comparison, averaging 66 versus 62.3. Inside this category, OfficeQA 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 86. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Llama 3.1 405B has the edge for multilingual tasks in this comparison, averaging 80.1 versus 78.1. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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