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GPT-4.1 Nano vs gpt-oss-120b

Head to head on 14 shared benchmarks, with price, context window, and release dates.

Benchmark scores

50

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Model
gpt-oss-120b

OpenAI

41.8%66.7%58.2%959elo35.867.2%5.9%58.3%70.7%77.5%36.0%71.6%5.3%45.0%--38.9%7.6%-----13.0%---57.6-51.0%60.2%38.8%50.3%48.6%68.9%39.2%-1.621.53-80.0%-97.9%-26.0%-65.6%---49.6%
GPT-4.1 Nano

OpenAI

8.9%24.0%42.1%944elo32.451.2%3.8%32.0%32.6%65.7%25.9%60.8%3.8%17.3%23.7%10.7%--1.53-0.173.3%0.0%42.5%-1.0%0.391.46-0.0%-------10.8%--84.8%-52.8%-0.44-1.64-39.8%68.0%68.0%30.9%
2 / 2 models
AttributeGPT-4.1 Nano

OpenAI

gpt-oss-120b

OpenAI

DescriptionGPT-4.1 Nano is an AI model from OpenAI.GPT-Oss 120b is an AI model from OpenAI, released with open weights.
FamilyGPTGPT
Params--
Open weightsclosedopen
Licenseproprietaryapache-2.0
Released14 Apr 20255 Aug 2025
Context1,047,576131,072
Input $/1M$0.10$0.15
Output $/1M$0.40$0.60
Cache read $/1M$0.025$0.030
Cache write $/1M--
Speed0 tok/s186 tok/s
Latency0.00 s0.50 s
Modalitiesimage, text, filetext
Providers--
PublisherOpenAIOpenAI
Reported scores
GPQA Diamond67.2% (AA)
LiveCodeBench70.7% (AA)
MMLU-Pro77.5% (AA)
SciCode36.0% (AA)

FAQ

Is GPT-4.1 Nano or gpt-oss-120b better?
Across the 14 benchmarks both models report on Sophon, gpt-oss-120b leads on 14 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GPT-4.1 Nano and gpt-oss-120b compare on GPQA Diamond?
GPT-4.1 Nano scores 51.2% and gpt-oss-120b scores 67.2% on GPQA Diamond.
Which is cheaper, GPT-4.1 Nano or gpt-oss-120b?
GPT-4.1 Nano is cheaper at $0.40 per million output tokens against $0.60 for gpt-oss-120b - about 1.5x.
When were GPT-4.1 Nano and gpt-oss-120b released?
GPT-4.1 Nano was released 14 Apr 2025 by OpenAI. gpt-oss-120b was released 5 Aug 2025 by OpenAI.

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