Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Seed 1.6 Flash is clearly ahead on the aggregate, 56 to 33. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Seed 1.6 Flash's sharpest advantage is in multimodal & grounded, where it averages 73.1 against 32.4. The single biggest benchmark swing on the page is MMMU-Pro, 74 to 27.
Seed 1.6 Flash is also the more expensive model on tokens at $0.08 input / $0.30 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. Seed 1.6 Flash gives you the larger context window at 256K, compared with 32K for LFM2.5-1.2B-Thinking.
Pick Seed 1.6 Flash if you want the stronger benchmark profile. LFM2.5-1.2B-Thinking only becomes the better choice if you want the cheaper token bill.
Seed 1.6 Flash
54.5
LFM2.5-1.2B-Thinking
34.1
Seed 1.6 Flash
27.6
LFM2.5-1.2B-Thinking
8.2
Seed 1.6 Flash
73.1
LFM2.5-1.2B-Thinking
32.4
Seed 1.6 Flash
66.8
LFM2.5-1.2B-Thinking
38.4
Seed 1.6 Flash
47.3
LFM2.5-1.2B-Thinking
27
Seed 1.6 Flash
81
LFM2.5-1.2B-Thinking
72
Seed 1.6 Flash
72.8
LFM2.5-1.2B-Thinking
60.7
Seed 1.6 Flash
67.1
LFM2.5-1.2B-Thinking
42.3
Seed 1.6 Flash is ahead overall, 56 to 33. The biggest single separator in this matchup is MMMU-Pro, where the scores are 74 and 27.
Seed 1.6 Flash has the edge for knowledge tasks in this comparison, averaging 47.3 versus 27. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for coding in this comparison, averaging 27.6 versus 8.2. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for math in this comparison, averaging 67.1 versus 42.3. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for reasoning in this comparison, averaging 66.8 versus 38.4. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for agentic tasks in this comparison, averaging 54.5 versus 34.1. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for multimodal and grounded tasks in this comparison, averaging 73.1 versus 32.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for instruction following in this comparison, averaging 81 versus 72. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for multilingual tasks in this comparison, averaging 72.8 versus 60.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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