Z.ai, formerly known as Zhipu and which has raised $1.5B from Tencent and others, releases GLM-4.5, an open source AI model that's cheaper to use than DeepSeek (Evelyn Cheng/CNBC)

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Evelyn Cheng / CNBC:Z.ai, formerly known as Zhipu and which has raised $1.5B from Tencent and others, releases GLM-4.5, an open source AI model that's cheaper to use than DeepSeek  —  BEIJING — Chinese companies are making smarter artificial intelligence models that are increasingly cheaper to use …