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 33. 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 multimodal & grounded, where it averages 66 against 32.4. The single biggest benchmark swing on the page is OpenBookQA, 75 to 22.
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 LFM2.5-1.2B-Thinking. That is roughly Infinityx on output cost alone. LFM2.5-1.2B-Thinking is the reasoning model in the pair, while Aion-2.0 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Aion-2.0 gives you the larger context window at 128K, compared with 32K for LFM2.5-1.2B-Thinking.
Pick Aion-2.0 if you want the stronger benchmark profile. LFM2.5-1.2B-Thinking only becomes the better choice if you want the cheaper token bill or you want the stronger reasoning-first profile.
Aion-2.0
51.7
LFM2.5-1.2B-Thinking
34.1
Aion-2.0
33.2
LFM2.5-1.2B-Thinking
8.2
Aion-2.0
66
LFM2.5-1.2B-Thinking
32.4
Aion-2.0
70.3
LFM2.5-1.2B-Thinking
38.4
Aion-2.0
54
LFM2.5-1.2B-Thinking
27
Aion-2.0
93
LFM2.5-1.2B-Thinking
72
Aion-2.0
78.1
LFM2.5-1.2B-Thinking
60.7
Aion-2.0
72.1
LFM2.5-1.2B-Thinking
42.3
Aion-2.0 is ahead overall, 58 to 33. The biggest single separator in this matchup is OpenBookQA, where the scores are 75 and 22.
Aion-2.0 has the edge for knowledge tasks in this comparison, averaging 54 versus 27. 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 8.2. Inside this category, HumanEval 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 42.3. 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 38.4. 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 34.1. 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 32.4. 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 72. 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 60.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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