GPT-OSS 120B Benchmark Scores & Performance

Benchmark analysis of GPT-OSS 120B by OpenAI across 14 tests.

Creator

OpenAI

Source Type

Open Weight

Reasoning

Non-Reasoning

Context Window

128K

Overall Score

42#66 of 88

Knowledge Benchmarks

MMLU
51
GPQA
50
SuperGPQA
48
OpenBookQA
46

Coding Benchmarks

HumanEval
43

Mathematics Benchmarks

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

Reasoning Benchmarks

SimpleQA
49
MuSR
47

Frequently Asked Questions

How does GPT-OSS 120B perform overall in AI benchmarks?

GPT-OSS 120B ranks #66 out of 88 models with an overall score of 42. It is created by OpenAI and features a 128K context window.

Is GPT-OSS 120B good for knowledge and understanding?

GPT-OSS 120B ranks #66 out of 88 models in knowledge and understanding benchmarks with an average score of 48.8. There are stronger options in this category.

Is GPT-OSS 120B good for coding and programming?

GPT-OSS 120B ranks #66 out of 88 models in coding and programming benchmarks with an average score of 43. There are stronger options in this category.

Is GPT-OSS 120B good for mathematics?

GPT-OSS 120B ranks #66 out of 88 models in mathematics benchmarks with an average score of 50. There are stronger options in this category.

Is GPT-OSS 120B good for reasoning and logic?

GPT-OSS 120B ranks #66 out of 88 models in reasoning and logic benchmarks with an average score of 48. There are stronger options in this category.

Is GPT-OSS 120B open source?

Yes, GPT-OSS 120B is an open weight model created by OpenAI, meaning it can be downloaded and run locally or fine-tuned for specific use cases.

What is the context window size of GPT-OSS 120B?

GPT-OSS 120B has a context window of 128K tokens, which determines how much text it can process in a single interaction.