DeepSeekMath V2 vs LFM2.5-1.2B-Instruct

Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.

DeepSeekMath V2 is clearly ahead on the aggregate, 66 to 30. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

DeepSeekMath V2's sharpest advantage is in mathematics, where it averages 84 against 37. The single biggest benchmark swing on the page is HumanEval, 72 to 14.

DeepSeekMath V2 is the reasoning model in the pair, while LFM2.5-1.2B-Instruct 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. DeepSeekMath V2 gives you the larger context window at 128K, compared with 32K for LFM2.5-1.2B-Instruct.

Quick Verdict

Pick DeepSeekMath V2 if you want the stronger benchmark profile. LFM2.5-1.2B-Instruct only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.

Agentic

DeepSeekMath V2

DeepSeekMath V2

63.9

LFM2.5-1.2B-Instruct

25.7

65
Terminal-Bench 2.0
22
66
BrowseComp
31
61
OSWorld-Verified
26

Coding

DeepSeekMath V2

DeepSeekMath V2

47.3

LFM2.5-1.2B-Instruct

7.2

72
HumanEval
14
45
SWE-bench Verified
9
44
LiveCodeBench
8
51
SWE-bench Pro
6

Multimodal & Grounded

DeepSeekMath V2

DeepSeekMath V2

68.1

LFM2.5-1.2B-Instruct

32.4

64
MMMU-Pro
27
73
OfficeQA Pro
39

Reasoning

DeepSeekMath V2

DeepSeekMath V2

75.9

LFM2.5-1.2B-Instruct

32.1

77
SimpleQA
24
75
MuSR
22
86
BBH
59
75
LongBench v2
34
72
MRCRv2
37

Knowledge

DeepSeekMath V2

DeepSeekMath V2

61

LFM2.5-1.2B-Instruct

26

80
MMLU
26
79
GPQA
25
77
SuperGPQA
23
75
OpenBookQA
21
74
MMLU-Pro
50
18
HLE
1
73
FrontierScience
30

Instruction Following

DeepSeekMath V2

DeepSeekMath V2

83

LFM2.5-1.2B-Instruct

80

83
IFEval
80

Multilingual

DeepSeekMath V2

DeepSeekMath V2

82.5

LFM2.5-1.2B-Instruct

60.7

87
MGSM
62
80
MMLU-ProX
60

Mathematics

DeepSeekMath V2

DeepSeekMath V2

84

LFM2.5-1.2B-Instruct

37

80
AIME 2023
24
82
AIME 2024
26
81
AIME 2025
25
76
HMMT Feb 2023
20
78
HMMT Feb 2024
22
77
HMMT Feb 2025
21
79
BRUMO 2025
23
90
MATH-500
54

Frequently Asked Questions

Which is better, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 is ahead overall, 66 to 30. The biggest single separator in this matchup is HumanEval, where the scores are 72 and 14.

Which is better for knowledge tasks, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for knowledge tasks in this comparison, averaging 61 versus 26. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for coding in this comparison, averaging 47.3 versus 7.2. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for math, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for math in this comparison, averaging 84 versus 37. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.

Which is better for reasoning, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for reasoning in this comparison, averaging 75.9 versus 32.1. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for agentic tasks in this comparison, averaging 63.9 versus 25.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for multimodal and grounded tasks in this comparison, averaging 68.1 versus 32.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for instruction following in this comparison, averaging 83 versus 80. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, DeepSeekMath V2 or LFM2.5-1.2B-Instruct?

DeepSeekMath V2 has the edge for multilingual tasks in this comparison, averaging 82.5 versus 60.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.

Last updated: March 12, 2026

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