benchlm.ai

GPT-OSS 20B vs MiMo-V2-Flash

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

Quick Verdict

MiMo-V2-Flash wins overall with a score of 63 vs 22 (41 point difference).MiMo-V2-Flash wins 4 out of 4 categories.

GPT-OSS 20B

CreatorOpenAI
TypeOpen Weight
Context128K
Score22

MiMo-V2-Flash

CreatorXiaomi
TypeOpen Weight
Context128K
Score63

Knowledge

MiMo-V2-Flash

GPT-OSS 20B

28.8

MiMo-V2-Flash

76.8

31
MMLU
79
30
GPQA
78
28
SuperGPQA
76
26
OpenBookQA
74

Coding

MiMo-V2-Flash

GPT-OSS 20B

23

MiMo-V2-Flash

71

23
HumanEval
71

Mathematics

MiMo-V2-Flash

GPT-OSS 20B

30

MiMo-V2-Flash

78

31
AIME 2023
79
33
AIME 2024
81
32
AIME 2025
80
27
HMMT Feb 2023
75
29
HMMT Feb 2024
77
28
HMMT Feb 2025
76
30
BRUMO 2025
78

Reasoning

MiMo-V2-Flash

GPT-OSS 20B

28

MiMo-V2-Flash

75

29
SimpleQA
76
27
MuSR
74

Frequently Asked Questions

Which is better, GPT-OSS 20B or MiMo-V2-Flash?

MiMo-V2-Flash scores higher overall with 63 vs 22, a difference of 41 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 20B or MiMo-V2-Flash?

MiMo-V2-Flash leads in knowledge tasks with an average score of 76.8 vs 28.8.

Which is better for coding, GPT-OSS 20B or MiMo-V2-Flash?

MiMo-V2-Flash leads in coding with an average score of 71 vs 23.

Which is better for math, GPT-OSS 20B or MiMo-V2-Flash?

MiMo-V2-Flash leads in math with an average score of 78 vs 30.

Which is better for reasoning, GPT-OSS 20B or MiMo-V2-Flash?

MiMo-V2-Flash leads in reasoning with an average score of 75 vs 28.

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