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 33. 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 32.4. The single biggest benchmark swing on the page is MMMU-Pro, 81 to 27.
LFM2.5-1.2B-Thinking is the reasoning model in the pair, while Claude 4 Sonnet 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. Claude 4 Sonnet gives you the larger context window at 200K, compared with 32K for LFM2.5-1.2B-Thinking.
Pick Claude 4 Sonnet if you want the stronger benchmark profile. LFM2.5-1.2B-Thinking only becomes the better choice if you want the stronger reasoning-first profile.
Claude 4 Sonnet
57.9
LFM2.5-1.2B-Thinking
34.1
Claude 4 Sonnet
42.9
LFM2.5-1.2B-Thinking
8.2
Claude 4 Sonnet
79.7
LFM2.5-1.2B-Thinking
32.4
Claude 4 Sonnet
71.8
LFM2.5-1.2B-Thinking
38.4
Claude 4 Sonnet
56.8
LFM2.5-1.2B-Thinking
27
Claude 4 Sonnet
83
LFM2.5-1.2B-Thinking
72
Claude 4 Sonnet
82.1
LFM2.5-1.2B-Thinking
60.7
Claude 4 Sonnet
76.1
LFM2.5-1.2B-Thinking
42.3
Claude 4 Sonnet is ahead overall, 64 to 33. The biggest single separator in this matchup is MMMU-Pro, where the scores are 81 and 27.
Claude 4 Sonnet has the edge for knowledge tasks in this comparison, averaging 56.8 versus 27. Inside this category, GPQA 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 8.2. Inside this category, HumanEval 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 42.3. Inside this category, AIME 2023 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 38.4. Inside this category, SimpleQA 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 34.1. Inside this category, BrowseComp 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 32.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for instruction following in this comparison, averaging 83 versus 72. 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 60.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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