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GLM 5 vs gpt-oss-120b

Head to head on 18 shared benchmarks, with price, context window, and release dates.

Benchmark scores

42

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Model
GLM 5

Zai

62.9%1598elo70.966.6%7.6%55.2%71.2%73.6%67.9%55.3%77.5%83.5%69.1%38.3%72.8%70.0%39.4%97.4%-----7.9%24.7%16.4%-97.982.7%48395---65.2%---73.369.7%61.12-23.4%56.4%
gpt-oss-120b

OpenAI

58.2%959elo35.867.2%5.9%58.3%51.0%60.2%38.8%50.3%48.6%68.9%39.2%36.0%26.0%71.6%5.3%45.0%41.8%66.7%38.9%7.6%13.0%---57.6---70.7%1.621.53-80.0%77.5%97.9%---65.6%-49.6%
2 / 2 models
AttributeGLM 5

Zai

gpt-oss-120b

OpenAI

DescriptionGLM-5 is an AI model from Zai, released with open weights.GPT-Oss 120b is an AI model from OpenAI, released with open weights.
FamilyGlmGPT
Params--
Open weightsopenopen
Licensemitapache-2.0
Released11 Feb 20265 Aug 2025
Context204,800131,072
Input $/1M$1.00$0.15
Output $/1M$3.20$0.60
Cache read $/1M$0.120$0.030
Cache write $/1M--
Speed0 tok/s186 tok/s
Latency0.00 s0.50 s
Modalitiestexttext
Providers--
PublisherZaiOpenAI
Reported scores
GPQA Diamond67.2% (AA)
LiveCodeBench70.7% (AA)
MMLU-Pro77.5% (AA)
SciCode36.0% (AA)

FAQ

Is GLM 5 or gpt-oss-120b better?
Across the 18 benchmarks both models report on Sophon, GLM 5 leads on 15 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GLM 5 and gpt-oss-120b compare on GPQA Diamond?
GLM 5 scores 66.6% and gpt-oss-120b scores 67.2% on GPQA Diamond.
Which is cheaper, GLM 5 or gpt-oss-120b?
gpt-oss-120b is cheaper at $0.60 per million output tokens against $3.20 for GLM 5 - about 5.3x.
When were GLM 5 and gpt-oss-120b released?
GLM 5 was released 11 Feb 2026 by Zai. gpt-oss-120b was released 5 Aug 2025 by OpenAI.

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