AI日报：xAI 震撼发布Grok4；微软开源全新Phi-4-mini版本；上海累计82款大模型通过备案
【AI日报速览】1.xAI发布Grok4模型，数学推理与代码生成能力突出，含开发者专用版本Grok4Code；2.微软开源Phi-4-mini，推理效率提升10倍，适配边缘设备；3.上海82款大模型通过备案，垂类应用成效显著；4.Hugging Face推出开源机器人Reachy Mini赋能AI开发者；5.Perplexity发布AI浏览器Comet挑战Chrome；6.OpenAI将首推开放权重模型打破闭源惯例；7.谷歌医疗AI模型MedGemma上新，单GPU可运行；8.OpenAI斥资65亿收购艾维AI硬件公司，进军硬件市场。
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