0

GLM 5.1 vs GPT-4o-mini

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

Benchmark scores

59

evals · sort by any column, ⤢ to expand fullscreen

Model
GLM 5.1

Zai

64.5%1589elo83.9%27.9%52.0%72.7%75.4%68.5%71.8%85.4%36.1%71.2%-----20.8%35.9%1.13--40.0%-73.544.8%33.5%34.7%15.1%----63.2%84.9%72.5%--67.0%41.6%-72.3%--22.2%-34.6%5.24-35.6%69.8-52.5%31.5%----97.1%53.6%
GPT-4o-mini

OpenAI

45.5%871elo42.6%4.2%31.0%47.2%43.0%65.8%32.9%64.8%22.9%60.5%16.7%3.6%11.7%14.7%50.7%---0.290.0%-0.0%-----0.0%1.540.0%72.0%---23.4%78.9%--62.8%-54.5%78.0%-3.81--100.0%--0.36--0.7883.3%54.5%22.5%-39.6%
2 / 2 models
AttributeGLM 5.1

Zai

GPT-4o-mini

OpenAI

DescriptionGLM-5.1 is an AI model from Zai, released with open weights.GPT-4o Mini is an AI model from OpenAI.
FamilyGlmGPT
Params--
Open weightsopenclosed
Licensemitproprietary
Released7 Apr 202618 Jul 2024
Context204,800128,000
Input $/1M$1.39$0.15
Output $/1M$4.40$0.60
Cache read $/1M$0.234$0.075
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestexttext, image, file
Providers--
PublisherZaiOpenAI
Reported scores

FAQ

Is GLM 5.1 or GPT-4o-mini 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-4o-mini compare on GPQA Diamond?
GLM 5.1 scores 83.9% and GPT-4o-mini scores 42.6% on GPQA Diamond.
Which is cheaper, GLM 5.1 or GPT-4o-mini?
GPT-4o-mini is cheaper at $0.60 per million output tokens against $4.40 for GLM 5.1 - about 7.3x.
When were GLM 5.1 and GPT-4o-mini released?
GLM 5.1 was released 7 Apr 2026 by Zai. GPT-4o-mini was released 18 Jul 2024 by OpenAI.

Comparing something else? Build your own side-by-side.