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 42. 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 reasoning, where it averages 70.3 against 31.3. The single biggest benchmark swing on the page is OfficeQA Pro, 72 to 38. Phi-4 does hit back in coding, 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 $0.00 input / $0.00 output per 1M tokens for Phi-4. That is roughly Infinityx on output cost alone. Aion-2.0 gives you the larger context window at 128K, compared with 16K for Phi-4.
Pick Aion-2.0 if you want the stronger benchmark profile. Phi-4 only becomes the better choice if coding is the priority or you want the cheaper token bill.
Aion-2.0
51.7
Phi-4
38.3
Aion-2.0
33.2
Phi-4
55
Aion-2.0
66
Phi-4
46.8
Aion-2.0
70.3
Phi-4
31.3
Aion-2.0
54
Phi-4
53.8
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Aion-2.0
78.1
Phi-4
67.2
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Aion-2.0 is ahead overall, 58 to 42. The biggest single separator in this matchup is OfficeQA Pro, where the scores are 72 and 38.
Aion-2.0 has the edge for knowledge tasks in this comparison, averaging 54 versus 53.8. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Phi-4 has the edge for coding in this comparison, averaging 55 versus 33.2. Inside this category, SWE-bench Pro 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 31.3. Inside this category, LongBench v2 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 38.3. Inside this category, BrowseComp 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 46.8. Inside this category, OfficeQA Pro 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 67.2. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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