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GPT-4.1 Nano vs GPT-5.5

Head to head on 13 shared benchmarks, with price, context window, and release dates.

Benchmark scores

72

evals · sort by any column, ⤢ to expand fullscreen

Model
GPT-5.5

OpenAI

68.4%1844elo78.251.7%76.8%13.7%46.1%88.6%68.8%47.3%75.0%49.2%69.3%---86.2%54.2%-12.9%--36.2%---86.0%90.0%100.0%1315elo34.0%51.8%5.7%44.8%-24.9%1769elo15.1%-51.8%-2.1%84.7%82.5%81.1%73.0%87.7%96.3%87.7%---92.8%49.1%86.9%78.7%45.3%100.0%50.0%51.5%4.2-58.6%75.7%83.4%--57.4%68.1%69.8%--61.9%
GPT-4.1 Nano

OpenAI

42.1%944elo32.41.0%51.2%3.8%32.0%65.7%52.8%25.9%60.8%3.8%17.3%8.9%23.7%24.0%--10.7%-1.53-0.17-3.3%0.0%42.5%--------0.39---1.46-0.0%--------32.6%10.8%84.8%---------0.44---1.6439.8%---68.0%68.0%30.9%
2 / 2 models
AttributeGPT-4.1 Nano

OpenAI

GPT-5.5

OpenAI

DescriptionGPT-4.1 Nano is an AI model from OpenAI.GPT-5.5 is an AI model from OpenAI.
FamilyGPTGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released14 Apr 202523 Apr 2026
Context1,047,5761,050,000
Input $/1M$0.10$5.00
Output $/1M$0.40$30.00
Cache read $/1M$0.025$0.500
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiesimage, text, filefile, image, text
Providers--
PublisherOpenAIOpenAI
Reported scores

FAQ

Is GPT-4.1 Nano or GPT-5.5 better?
Across the 13 benchmarks both models report on Sophon, GPT-5.5 leads on 13 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-5.5 compare on GPQA Diamond?
GPT-4.1 Nano scores 51.2% and GPT-5.5 scores 76.8% on GPQA Diamond.
Which is cheaper, GPT-4.1 Nano or GPT-5.5?
GPT-4.1 Nano is cheaper at $0.40 per million output tokens against $30.00 for GPT-5.5 - about 75.0x.
When were GPT-4.1 Nano and GPT-5.5 released?
GPT-4.1 Nano was released 14 Apr 2025 by OpenAI. GPT-5.5 was released 23 Apr 2026 by OpenAI.

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