GPT-OSS 120B vs LFM2-24B-A2B

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

GPT-OSS 120B is clearly ahead on the aggregate, 48 to 38. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

GPT-OSS 120B's sharpest advantage is in agentic, where it averages 44.8 against 33.4. The single biggest benchmark swing on the page is MRCRv2, 59 to 45.

GPT-OSS 120B gives you the larger context window at 128K, compared with 32K for LFM2-24B-A2B.

Quick Verdict

Pick GPT-OSS 120B if you want the stronger benchmark profile. LFM2-24B-A2B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Agentic

GPT-OSS 120B

GPT-OSS 120B

44.8

LFM2-24B-A2B

33.4

43
Terminal-Bench 2.0
30
50
BrowseComp
38
43
OSWorld-Verified
34

Coding

GPT-OSS 120B

GPT-OSS 120B

28.1

LFM2-24B-A2B

18

43
HumanEval
42
29
SWE-bench Verified
18
25
LiveCodeBench
17
31
SWE-bench Pro
19

Multimodal & Grounded

GPT-OSS 120B

GPT-OSS 120B

48.8

LFM2-24B-A2B

41.7

42
MMMU-Pro
39
57
OfficeQA Pro
45

Reasoning

GPT-OSS 120B

GPT-OSS 120B

55.2

LFM2-24B-A2B

46.6

49
SimpleQA
44
47
MuSR
42
73
BBH
63
58
LongBench v2
48
59
MRCRv2
45

Knowledge

GPT-OSS 120B

GPT-OSS 120B

41.5

LFM2-24B-A2B

35.6

51
MMLU
46
50
GPQA
45
48
SuperGPQA
43
46
OpenBookQA
41
63
MMLU-Pro
51
5
HLE
4
49
FrontierScience
43

Instruction Following

GPT-OSS 120B

GPT-OSS 120B

79

LFM2-24B-A2B

68

79
IFEval
68

Multilingual

GPT-OSS 120B

GPT-OSS 120B

70.7

LFM2-24B-A2B

61.4

72
MGSM
64
70
MMLU-ProX
60

Mathematics

GPT-OSS 120B

GPT-OSS 120B

59.5

LFM2-24B-A2B

50.4

51
AIME 2023
46
53
AIME 2024
48
52
AIME 2025
47
47
HMMT Feb 2023
42
49
HMMT Feb 2024
44
48
HMMT Feb 2025
43
50
BRUMO 2025
45
71
MATH-500
57

Frequently Asked Questions

Which is better, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B is ahead overall, 48 to 38. The biggest single separator in this matchup is MRCRv2, where the scores are 59 and 45.

Which is better for knowledge tasks, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for knowledge tasks in this comparison, averaging 41.5 versus 35.6. Inside this category, MMLU-Pro is the benchmark that creates the most daylight between them.

Which is better for coding, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for coding in this comparison, averaging 28.1 versus 18. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.

Which is better for math, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for math in this comparison, averaging 59.5 versus 50.4. Inside this category, MATH-500 is the benchmark that creates the most daylight between them.

Which is better for reasoning, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for reasoning in this comparison, averaging 55.2 versus 46.6. Inside this category, MRCRv2 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for agentic tasks in this comparison, averaging 44.8 versus 33.4. 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, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for multimodal and grounded tasks in this comparison, averaging 48.8 versus 41.7. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for instruction following in this comparison, averaging 79 versus 68. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, GPT-OSS 120B or LFM2-24B-A2B?

GPT-OSS 120B has the edge for multilingual tasks in this comparison, averaging 70.7 versus 61.4. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.

Last updated: March 12, 2026

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