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gpt-oss-120b

Open weights

GPT-Oss 120b is an AI model from OpenAI, released with open weights.

Publisher
OpenAI
Family
GPT
Context
131K
Input
Output
License
apache-2.0
Released
5 Aug 2025

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Notes

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Attribution

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Context
131K
Input
$0.15
/1M tok
Output
$0.60
/1M tok
Blended
$0.26
#224/ 414/1M · 3:1
Speed
421
#4/ 414tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reported on 28 evals across 8 domains - best 97.9% on Spam Detection RL Environment · #2 of 2

Reported eval scores

28
Mastermind1.6
Backend Bench38.9
Backend Bench7.6
Mastermind1.5
Spam Detection RL Environment97.9
LiveCodeBench70.7
Aider Polyglot Benchmark41.8
SWE-bench Verified26
IFBench58.3
LiveBench - Coding60.2
LiveBench - Language48.6
Terminal-Bench (Hard)5.3
LiveBench - Instruction Following50.3
LiveBench - Math68.9
LiveBench - Reasoning39.2
LiveBench - Data Analysis38.8
AIME 2025: Problems from the American Invitational Mathematics Examination66.7
MMLU-Pro77.5
Humanity's Last Exam (HLE)5.2
LiveBench51
SciCode36
GPQA Diamond67.2
τ²-bench (Tau²-bench)45
TaxEval v271.6
CorpFin v258.2