GLM-5.2 vs o3

o3 leads in 3 of 8 categories

Arena ELO

o3

Cheaper

GLM-5.2

Faster

o3

Detailed Comparison

Category	GLM-5.2	o3
Provider	Z.ai	OpenAI
Context Window	128K	200K WIN
Input Price ($/1M)	$1.4 WIN	$10
Output Price ($/1M)	$4.4 WIN	$40
Arena ELO	N/A	1350 WIN
Coding	N/A	unknown
Reasoning	N/A	unknown
Speed (tokens/sec)	N/A	~30 t/s WIN
Open Source	Yes	No

Frequently Asked Questions

Which is cheaper, GLM-5.2 or o3?

GLM-5.2 is approximately 88% cheaper than o3 per million tokens.

Which is better for coding, GLM-5.2 or o3?

GLM-5.2 scores N/A on coding benchmarks, while o3 scores unknown.

Which has a larger context window?

GLM-5.2 supports 128K context, while o3 supports 200K.

Is GLM-5.2 or o3 open source?

GLM-5.2 is open source. o3 is proprietary.

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