GPT-OSS 120B vs Llama 4 Behemoth

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

Quick Verdict

GPT-OSS 120B wins overall with a score of 42 vs 39 (3 point difference).GPT-OSS 120B wins 4 out of 4 categories.

Knowledge

GPT-OSS 120B

GPT-OSS 120B

48.8

Llama 4 Behemoth

45.8

51
MMLU
48
50
GPQA
47
48
SuperGPQA
45
46
OpenBookQA
43

Coding

GPT-OSS 120B

GPT-OSS 120B

43

Llama 4 Behemoth

40

43
HumanEval
40

Mathematics

GPT-OSS 120B

GPT-OSS 120B

50

Llama 4 Behemoth

47

51
AIME 2023
48
53
AIME 2024
50
52
AIME 2025
49
47
HMMT Feb 2023
44
49
HMMT Feb 2024
46
48
HMMT Feb 2025
45
50
BRUMO 2025
47

Reasoning

GPT-OSS 120B

GPT-OSS 120B

48

Llama 4 Behemoth

45

49
SimpleQA
46
47
MuSR
44

Frequently Asked Questions

Which is better, GPT-OSS 120B or Llama 4 Behemoth?

GPT-OSS 120B scores higher overall with 42 vs 39, a difference of 3 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 120B or Llama 4 Behemoth?

GPT-OSS 120B leads in knowledge tasks with an average score of 48.8 vs 45.8.

Which is better for coding, GPT-OSS 120B or Llama 4 Behemoth?

GPT-OSS 120B leads in coding with an average score of 43 vs 40.

Which is better for math, GPT-OSS 120B or Llama 4 Behemoth?

GPT-OSS 120B leads in math with an average score of 50 vs 47.

Which is better for reasoning, GPT-OSS 120B or Llama 4 Behemoth?

GPT-OSS 120B leads in reasoning with an average score of 48 vs 45.