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Claude Opus 5 vs GLM-5.2

GLM-5.2 leads in 2 of 8 categories

Arena ELO

Tie

Cheaper

GLM-5.2

Faster

Tie

Detailed Comparison

CategoryClaude Opus 5GLM-5.2
ProviderAnthropic Z.ai
Context Window200K WIN128K
Input Price ($/1M)$15 $1.4 WIN
Output Price ($/1M)$75 $4.4 WIN
Arena ELON/A N/A
CodingN/A N/A
ReasoningN/A N/A
Speed (tokens/sec)N/A N/A
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, Claude Opus 5 or GLM-5.2?

GLM-5.2 is approximately 94% cheaper than Claude Opus 5 per million tokens.

Which has a larger context window?

Claude Opus 5 supports 200K context, while GLM-5.2 supports 128K.

Is Claude Opus 5 or GLM-5.2 open source?

Claude Opus 5 is proprietary. GLM-5.2 is open source.

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