Claude Sonnet 5 vs GLM 5.2: the closed benchmark king vs the open model you can actually run
Anthropic's Claude Sonnet 5 launched June 30 at near-Opus quality, $2/$10 per million tokens intro. Open-weights GLM 5.2 lands within a point on coding and reasoning for roughly half the API cost, and unlike Sonnet 5 you can download and run it yourself. Here is the benchmark-by-benchmark comparison.
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