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GLM 5.1 vs GPT-4.1 Nano

Head to head on 12 shared benchmarks, with price, context window, and release dates.

Benchmark scores

56

evals · sort by any column, ⤢ to expand fullscreen

Model
GLM 5.1

Zai

64.5%1589elo73.533.5%83.9%27.9%52.0%85.4%36.1%71.2%35.6%97.1%---20.8%-35.9%1.13-----40.0%44.8%34.7%-15.1%--72.7%75.4%63.2%68.5%71.8%84.9%72.5%---67.0%41.6%72.3%-22.2%34.6%5.24--69.8-52.5%31.5%--53.6%
GPT-4.1 Nano

OpenAI

42.1%944elo32.41.0%51.2%3.8%32.0%65.7%25.9%60.8%3.8%17.3%8.9%23.7%24.0%-10.7%--1.53-0.173.3%0.0%42.5%---0.39-1.460.0%-------32.6%10.8%84.8%---52.8%---0.441.64-39.8%--68.0%68.0%30.9%
2 / 2 models
AttributeGLM 5.1

Zai

GPT-4.1 Nano

OpenAI

DescriptionGLM-5.1 is an AI model from Zai, released with open weights.GPT-4.1 Nano is an AI model from OpenAI.
FamilyGlmGPT
Params--
Open weightsopenclosed
Licensemitproprietary
Released7 Apr 202614 Apr 2025
Context204,8001,047,576
Input $/1M$1.39$0.10
Output $/1M$4.40$0.40
Cache read $/1M$0.234$0.025
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestextimage, text, file
Providers--
PublisherZaiOpenAI
Reported scores

FAQ

Is GLM 5.1 or GPT-4.1 Nano better?
Across the 12 benchmarks both models report on Sophon, GLM 5.1 leads on 12 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GLM 5.1 and GPT-4.1 Nano compare on GPQA Diamond?
GLM 5.1 scores 83.9% and GPT-4.1 Nano scores 51.2% on GPQA Diamond.
Which is cheaper, GLM 5.1 or GPT-4.1 Nano?
GPT-4.1 Nano is cheaper at $0.40 per million output tokens against $4.40 for GLM 5.1 - about 11.0x.
When were GLM 5.1 and GPT-4.1 Nano released?
GLM 5.1 was released 7 Apr 2026 by Zai. GPT-4.1 Nano was released 14 Apr 2025 by OpenAI.

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