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Another week in the summer of 2025 has begun, and in a continuation of the trend from last week, with it arrives more powerful Chinese open source AI models.
Little-known (at least to us here in the West) Chinese startup Z.ai has introduced two new open source LLMs — GLM-4.5 and GLM-4.5-Air — casting them as go-to solutions for AI reasoning, agentic behavior, and coding.
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And according to Z.ai’s blog post, the models perform near the top of the pack of other proprietary LLM leaders in the U.S.







