9月12日，微软扔出了一颗不太起眼但意味深长的炸弹。
微软宣布在Copilot for Word、Excel和PowerPoint中添加Grok模型，目前面向Microsoft Frontier客户开放预览，默认关闭，需手动启用。EU/EFTA/UK地区在预览期间暂不可用。这看起来只是一次普通的模型更新，但背后的故事远比表面复杂。
Grok的来历：从Musk的死敌到微软的室友
Grok来自SpaceXAI——这个名字需要拆解。2026年2月，Elon Musk的xAI被SpaceX收购；7月，合并后的实体更名为SpaceXAI。也就是说，Grok背后的AI团队现在隶属于SpaceX帝国。
这意味着什么？Musk曾是OpenAI最激烈的批评者，公开嘲讽微软与OpenAI的关系，甚至起诉OpenAI违背开源承诺。而现在，Musk的AI模型正通过微软的Copilot触达数亿Office用户。从死敌变室友，AI行业的关系网比任何剧本都离奇。
值得注意的是，Grok默认关闭——这意味着微软给了企业客户选择权，而不是强行推送。Frontier客户可以手动开启Grok，在Word中用于创意写作，在Excel中用于数据分析，在PowerPoint中用于演示生成。Grok 4.7即将发布，拥有2.1万亿参数，这个体量让它在某些任务上可能比GPT和Claude更有优势。
多模型帝国：微软的战略进化
Grok进入Copilot，是微软"多模型战略"的又一步棋。
一年前，Copilot几乎等同于"OpenAI的GPT"。但过去几个月，微软接连引入了Anthropic的Claude作为第二个模型家族，现在又加入了SpaceXAI的Grok作为第三个。Copilot正在从"OpenAI前端"变成"模型市场的聚合平台"。
这个策略的逻辑很清晰：不把鸡蛋放在一个篮子里。微软在OpenAI身上押了超过130亿美元，但如果OpenAI的模型在某些场景下不是最优解呢？多模型策略让微软可以在不同任务上选择最适合的模型——用Claude处理长文档分析，用GPT处理通用对话，用Grok处理创意内容。
对OpenAI来说，这是一个微妙的信号：你依然是最重要的合作伙伴，但你不再是唯一的选择。对Anthropic和SpaceXAI来说，通过Copilot触达数亿Office用户，是一个极具吸引力的分发渠道。
Frontier客户：高端市场的实验场
微软选择将Grok首先开放给Frontier客户，这个定位很有意思。
Frontier是微软的高端企业订阅层级，面向愿意率先尝试最新AI能力的企业。将Grok限定在Frontier客户，既控制了风险（如果Grok表现不佳，影响范围有限），又收集了真实的企业使用反馈。
EU/EFTA/UK地区的排除也不是意外。欧盟的AI法案对新模型的部署有严格要求，微软选择在合规审查完成前不向欧洲用户开放，是典型的"先美后欧"策略。
当微软的Copilot从"一个模型"变成"多个模型可选"，企业客户的AI策略也需要随之调整。选模型正在成为一种新的IT决策——就像当年选云服务商一样。而微软把自己定位为"不做选择的选择平台"，这个策略可能是Copilot最深的护城河。
明天见。
On September 12, Microsoft dropped a bomb that's easy to overlook but impossible to underestimate.
Microsoft announced the addition of Grok models to Copilot for Word, Excel, and PowerPoint, currently in preview for Microsoft Frontier customers — off by default, requiring manual activation. EU/EFTA/UK regions are excluded during the preview. This looks like a routine model update, but the backstory runs much deeper.
Grok's Origin: From Musk's Nemesis to Microsoft's Roommate
Grok comes from SpaceXAI — that name needs unpacking. In February 2026, Elon Musk's xAI was acquired by SpaceX; in July, the combined entity rebranded as SpaceXAI. That means Grok's AI team now operates under the SpaceX empire.
What does this mean? Musk was OpenAI's fiercest critic — publicly mocking Microsoft's relationship with OpenAI, even suing OpenAI for abandoning its open-source promises. Now, Musk's AI model is reaching hundreds of millions of Office users through Microsoft's Copilot. From mortal enemy to roommate — AI's relationship web is wilder than any screenplay.
Notably, Grok is off by default — meaning Microsoft gives enterprise customers choice rather than force-feeding. Frontier customers can manually activate Grok for creative writing in Word, data analysis in Excel, and presentation generation in PowerPoint. Grok 4.7, with 2.1 trillion parameters, is about to launch — a scale that may give it advantages over GPT and Claude in certain tasks.
The Multi-Model Empire: Microsoft's Strategic Evolution
Grok entering Copilot is another chess move in Microsoft's "multi-model strategy."
A year ago, Copilot was essentially synonymous with "OpenAI's GPT." But in recent months, Microsoft has added Anthropic's Claude as a second model family, and now SpaceXAI's Grok as a third. Copilot is transforming from "OpenAI's frontend" to a "model marketplace aggregation platform."
The logic is clear: don't put all eggs in one basket. Microsoft has invested over $13 billion in OpenAI, but what if OpenAI's model isn't optimal in every scenario? The multi-model strategy lets Microsoft choose the best model for different tasks — Claude for long-document analysis, GPT for general conversation, Grok for creative content.
For OpenAI, this is a subtle signal: you're still the most important partner, but you're no longer the only option. For Anthropic and SpaceXAI, reaching hundreds of millions of Office users through Copilot is a massively attractive distribution channel.
Frontier Customers: The Premium Market's Lab
Microsoft's choice to open Grok first to Frontier customers is strategically telling.
Frontier is Microsoft's premium enterprise subscription tier, targeting companies willing to beta-test the latest AI capabilities. Limiting Grok to Frontier contains risk (if Grok underperforms, blast radius is limited) while collecting real enterprise feedback.
The EU/EFTA/UK exclusion isn't surprising either. The EU AI Act imposes strict requirements on new model deployments. Microsoft choosing to hold off on European rollout until compliance reviews are complete is the classic "US first, EU later" playbook.
When Microsoft's Copilot shifts from "one model" to "multiple models to choose from," enterprise AI strategies need to evolve accordingly. Choosing a model is becoming a new kind of IT decision — just like choosing a cloud provider was a decade ago. And Microsoft positioning itself as "the platform where you don't have to choose" may be Copilot's deepest moat.
See you tomorrow.
从死敌到室友——AI行业的关系网比任何剧本都离奇。
—— Dawn Vision编辑部
From nemesis to roommate — AI's relationship web is wilder than any screenplay.
— The Dawn Vision Editorial Desk
Sources · 信源 Sources
本文基于 Dawn Vision 认知引擎处理的 10 个源信号生成，经编辑部人工审核。素材来源：Microsoft Blog、The Verge、TechCrunch。
This article was generated by the Dawn Vision cognitive engine processing 10 source signals, with human editorial review. Sources: Microsoft Blog, The Verge, TechCrunch.
