GPT-OSS 120B vs Llama 3 70B

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

Quick Verdict

Llama 3 70B wins overall with a score of 48 vs 42 (6 point difference).Llama 3 70B wins 4 out of 4 categories.

Knowledge

Llama 3 70B

GPT-OSS 120B

48.8

Llama 3 70B

56.5

51
MMLU
58
50
GPQA
58
48
SuperGPQA
56
46
OpenBookQA
54

Coding

Llama 3 70B

GPT-OSS 120B

43

Llama 3 70B

50

43
HumanEval
50

Mathematics

Llama 3 70B

GPT-OSS 120B

50

Llama 3 70B

57

51
AIME 2023
58
53
AIME 2024
60
52
AIME 2025
59
47
HMMT Feb 2023
54
49
HMMT Feb 2024
56
48
HMMT Feb 2025
55
50
BRUMO 2025
57

Reasoning

Llama 3 70B

GPT-OSS 120B

48

Llama 3 70B

55

49
SimpleQA
56
47
MuSR
54

Frequently Asked Questions

Which is better, GPT-OSS 120B or Llama 3 70B?

Llama 3 70B scores higher overall with 48 vs 42, a difference of 6 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 120B or Llama 3 70B?

Llama 3 70B leads in knowledge tasks with an average score of 56.5 vs 48.8.

Which is better for coding, GPT-OSS 120B or Llama 3 70B?

Llama 3 70B leads in coding with an average score of 50 vs 43.

Which is better for math, GPT-OSS 120B or Llama 3 70B?

Llama 3 70B leads in math with an average score of 57 vs 50.

Which is better for reasoning, GPT-OSS 120B or Llama 3 70B?

Llama 3 70B leads in reasoning with an average score of 55 vs 48.