GPT-OSS 20B vs MiniMax M2.5

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

Quick Verdict

MiniMax M2.5 wins overall with a score of 59 vs 22 (37 point difference).MiniMax M2.5 wins 4 out of 4 categories.

Knowledge

MiniMax M2.5

GPT-OSS 20B

28.8

MiniMax M2.5

70.8

31
MMLU
73
30
GPQA
72
28
SuperGPQA
70
26
OpenBookQA
68

Coding

MiniMax M2.5

GPT-OSS 20B

23

MiniMax M2.5

65

23
HumanEval
65

Mathematics

MiniMax M2.5

GPT-OSS 20B

30

MiniMax M2.5

72

31
AIME 2023
73
33
AIME 2024
75
32
AIME 2025
74
27
HMMT Feb 2023
69
29
HMMT Feb 2024
71
28
HMMT Feb 2025
70
30
BRUMO 2025
72

Reasoning

MiniMax M2.5

GPT-OSS 20B

28

MiniMax M2.5

69

29
SimpleQA
70
27
MuSR
68

Frequently Asked Questions

Which is better, GPT-OSS 20B or MiniMax M2.5?

MiniMax M2.5 scores higher overall with 59 vs 22, a difference of 37 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 20B or MiniMax M2.5?

MiniMax M2.5 leads in knowledge tasks with an average score of 70.8 vs 28.8.

Which is better for coding, GPT-OSS 20B or MiniMax M2.5?

MiniMax M2.5 leads in coding with an average score of 65 vs 23.

Which is better for math, GPT-OSS 20B or MiniMax M2.5?

MiniMax M2.5 leads in math with an average score of 72 vs 30.

Which is better for reasoning, GPT-OSS 20B or MiniMax M2.5?

MiniMax M2.5 leads in reasoning with an average score of 69 vs 28.