Gemini 3 Pro Deep Think vs LFM2.5-1.2B-Thinking

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

Gemini 3 Pro Deep Think is clearly ahead on the aggregate, 81 to 33. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Gemini 3 Pro Deep Think's sharpest advantage is in multimodal & grounded, where it averages 95 against 32.4. The single biggest benchmark swing on the page is HumanEval, 91 to 17.

Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 32K for LFM2.5-1.2B-Thinking.

Quick Verdict

Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. LFM2.5-1.2B-Thinking only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Agentic

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

78.1

LFM2.5-1.2B-Thinking

34.1

77
Terminal-Bench 2.0
34
87
BrowseComp
37
73
OSWorld-Verified
32

Coding

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

60.3

LFM2.5-1.2B-Thinking

8.2

91
HumanEval
17
58
SWE-bench Verified
10
58
LiveCodeBench
9
63
SWE-bench Pro
7

Multimodal & Grounded

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

95

LFM2.5-1.2B-Thinking

32.4

95
MMMU-Pro
27
95
OfficeQA Pro
39

Reasoning

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

94.5

LFM2.5-1.2B-Thinking

38.4

95
SimpleQA
29
93
MuSR
31
95
BBH
67
94
LongBench v2
39
96
MRCRv2
42

Knowledge

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

74.7

LFM2.5-1.2B-Thinking

27

99
MMLU
27
97
GPQA
26
95
SuperGPQA
24
93
OpenBookQA
22
81
MMLU-Pro
51
32
HLE
2
88
FrontierScience
31

Instruction Following

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

89

LFM2.5-1.2B-Thinking

72

89
IFEval
72

Multilingual

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

87.4

LFM2.5-1.2B-Thinking

60.7

92
MGSM
62
85
MMLU-ProX
60

Mathematics

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

94.5

LFM2.5-1.2B-Thinking

42.3

99
AIME 2023
28
99
AIME 2024
30
98
AIME 2025
29
95
HMMT Feb 2023
24
97
HMMT Feb 2024
26
96
HMMT Feb 2025
25
96
BRUMO 2025
27
92
MATH-500
61

Frequently Asked Questions

Which is better, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think is ahead overall, 81 to 33. The biggest single separator in this matchup is HumanEval, where the scores are 91 and 17.

Which is better for knowledge tasks, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for knowledge tasks in this comparison, averaging 74.7 versus 27. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for coding in this comparison, averaging 60.3 versus 8.2. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for math, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for math in this comparison, averaging 94.5 versus 42.3. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for reasoning in this comparison, averaging 94.5 versus 38.4. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for agentic tasks in this comparison, averaging 78.1 versus 34.1. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for multimodal and grounded tasks in this comparison, averaging 95 versus 32.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for instruction following in this comparison, averaging 89 versus 72. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Gemini 3 Pro Deep Think or LFM2.5-1.2B-Thinking?

Gemini 3 Pro Deep Think has the edge for multilingual tasks in this comparison, averaging 87.4 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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