Claude 3 Opus vs LFM2.5-1.2B-Instruct

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

Claude 3 Opus is clearly ahead on the aggregate, 51 to 30. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude 3 Opus's sharpest advantage is in multimodal & grounded, where it averages 70.3 against 32.4. The single biggest benchmark swing on the page is MMMU-Pro, 73 to 27. LFM2.5-1.2B-Instruct does hit back in instruction following, so the answer changes if that is the part of the workload you care about most.

Claude 3 Opus gives you the larger context window at 200K, compared with 32K for LFM2.5-1.2B-Instruct.

Quick Verdict

Pick Claude 3 Opus if you want the stronger benchmark profile. LFM2.5-1.2B-Instruct only becomes the better choice if instruction following is the priority.

Agentic

Claude 3 Opus

Claude 3 Opus

48.1

LFM2.5-1.2B-Instruct

25.7

44
Terminal-Bench 2.0
22
56
BrowseComp
31
47
OSWorld-Verified
26

Coding

Claude 3 Opus

Claude 3 Opus

19

LFM2.5-1.2B-Instruct

7.2

53
HumanEval
14
10
SWE-bench Verified
9
20
LiveCodeBench
8
20
SWE-bench Pro
6

Multimodal & Grounded

Claude 3 Opus

Claude 3 Opus

70.3

LFM2.5-1.2B-Instruct

32.4

73
MMMU-Pro
27
67
OfficeQA Pro
39

Reasoning

Claude 3 Opus

Claude 3 Opus

61.6

LFM2.5-1.2B-Instruct

32.1

59
SimpleQA
24
57
MuSR
22
74
BBH
59
62
LongBench v2
34
63
MRCRv2
37

Knowledge

Claude 3 Opus

Claude 3 Opus

45

LFM2.5-1.2B-Instruct

26

61
MMLU
26
61
GPQA
25
59
SuperGPQA
23
57
OpenBookQA
21
62
MMLU-Pro
50
1
HLE
1
56
FrontierScience
30

Instruction Following

LFM2.5-1.2B-Instruct

Claude 3 Opus

77

LFM2.5-1.2B-Instruct

80

77
IFEval
80

Multilingual

Claude 3 Opus

Claude 3 Opus

69.8

LFM2.5-1.2B-Instruct

60.7

73
MGSM
62
68
MMLU-ProX
60

Mathematics

Claude 3 Opus

Claude 3 Opus

65.9

LFM2.5-1.2B-Instruct

37

61
AIME 2023
24
63
AIME 2024
26
62
AIME 2025
25
57
HMMT Feb 2023
20
59
HMMT Feb 2024
22
58
HMMT Feb 2025
21
60
BRUMO 2025
23
73
MATH-500
54

Frequently Asked Questions

Which is better, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus is ahead overall, 51 to 30. The biggest single separator in this matchup is MMMU-Pro, where the scores are 73 and 27.

Which is better for knowledge tasks, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for knowledge tasks in this comparison, averaging 45 versus 26. Inside this category, GPQA is the benchmark that creates the most daylight between them.

Which is better for coding, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for coding in this comparison, averaging 19 versus 7.2. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for math, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for math in this comparison, averaging 65.9 versus 37. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for reasoning in this comparison, averaging 61.6 versus 32.1. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for agentic tasks in this comparison, averaging 48.1 versus 25.7. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for multimodal and grounded tasks in this comparison, averaging 70.3 versus 32.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, Claude 3 Opus or LFM2.5-1.2B-Instruct?

LFM2.5-1.2B-Instruct has the edge for instruction following in this comparison, averaging 80 versus 77. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Claude 3 Opus or LFM2.5-1.2B-Instruct?

Claude 3 Opus has the edge for multilingual tasks in this comparison, averaging 69.8 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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