GLM-5.2 vs GPT-4o

Both models are evenly matched

Arena ELO

GPT-4o

Cheaper

GLM-5.2

Faster

GPT-4o

Detailed Comparison

Category	GLM-5.2	GPT-4o
Provider	Z.ai	OpenAI
Context Window	128K	128K
Input Price ($/1M)	$1.4 WIN	$2.5
Output Price ($/1M)	$4.4 WIN	$10
Arena ELO	N/A	1340 WIN
Coding	N/A	30.8% SWE-bench
Reasoning	N/A	unknown
Speed (tokens/sec)	N/A	~100 t/s WIN
Open Source	Yes	No

Frequently Asked Questions

Which is cheaper, GLM-5.2 or GPT-4o?

GLM-5.2 is approximately 54% cheaper than GPT-4o per million tokens.

Which is better for coding, GLM-5.2 or GPT-4o?

GLM-5.2 scores N/A on coding benchmarks, while GPT-4o scores 30.8% SWE-bench.

Which has a larger context window?

GLM-5.2 supports 128K context, while GPT-4o supports 128K.

Is GLM-5.2 or GPT-4o open source?

GLM-5.2 is open source. GPT-4o is proprietary.

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