Build advanced reasoning agents with GLM 5.2 (Free), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support, open weights architecture. Access GLM 5.2 (Free) via the ZenMux API with up to 131K output tokens.
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GLM 5.2 (Free) by ZenMux costs Free per 1M input tokens and Free per 1M output tokens. Cached reads cost Free per 1M tokens.