Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Claude 4 Sonnet is clearly ahead on the aggregate, 64 to 58. 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 multimodal & grounded, where it averages 79.7 against 66. The single biggest benchmark swing on the page is MMMU-Pro, 81 to 61. 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.
Claude 4 Sonnet gives you the larger context window at 200K, compared with 128K for Aion-2.0.
Pick Claude 4 Sonnet if you want the stronger benchmark profile. Aion-2.0 only becomes the better choice if instruction following is the priority.
Claude 4 Sonnet
57.9
Aion-2.0
51.7
Claude 4 Sonnet
42.9
Aion-2.0
33.2
Claude 4 Sonnet
79.7
Aion-2.0
66
Claude 4 Sonnet
71.8
Aion-2.0
70.3
Claude 4 Sonnet
56.8
Aion-2.0
54
Claude 4 Sonnet
83
Aion-2.0
93
Claude 4 Sonnet
82.1
Aion-2.0
78.1
Claude 4 Sonnet
76.1
Aion-2.0
72.1
Claude 4 Sonnet is ahead overall, 64 to 58. The biggest single separator in this matchup is MMMU-Pro, where the scores are 81 and 61.
Claude 4 Sonnet has the edge for knowledge tasks in this comparison, averaging 56.8 versus 54. Inside this category, MMLU-Pro is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for coding in this comparison, averaging 42.9 versus 33.2. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for math in this comparison, averaging 76.1 versus 72.1. Inside this category, MATH-500 is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for reasoning in this comparison, averaging 71.8 versus 70.3. Inside this category, LongBench v2 is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for agentic tasks in this comparison, averaging 57.9 versus 51.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for multimodal and grounded tasks in this comparison, averaging 79.7 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 83. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for multilingual tasks in this comparison, averaging 82.1 versus 78.1. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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