Grok 4.1 Fast is now available in preview for US organisations, with admin opt-in required before use.
Microsoft says customer data processed through the model will not be used to train xAI systems, though it runs outside Microsoft infrastructure.
Elon Musk teased Grok 4.20 in response to Satya Nadella, but did not reveal a launch timeline or feature details.
Microsoft has officially expanded the capabilities of its Copilot Studio by adding xAI’s Grok 4.1 Fast model. The company shared a blog post stating that the roll out has started in the United States, where organisations can choose to enable the model within the ecosystem. The company aims to give businesses more flexibility in selecting the AI systems that power their custom agents, specifically for the complex, text-heavy workflows that require fast reasoning and the ability to handle large volumes of context.
SurveyAccording to Microsoft, Grok 4.1 Fast is specifically designed for advanced reasoning and text generation tasks. It does not support image or multimedia creation, but is designed to manage complex tool usage and processes across enterprise applications.
According to the company, Copilot Studio continues to support models from other providers, such as OpenAI and Anthropic, with each model going through internal safety, security, and quality checks before being released. Microsoft stated that responsible AI standards are still central to how models are evaluated and deployed on the platform.
In terms of data, Microsoft clarified that customer information processed through Grok 4.1 Fast will not be retained or used to train xAI systems. However, the model operates outside of Microsoft-managed infrastructure. Opting in will result in a separate agreement with xAI, governed by its enterprise terms and data protection policies.
The feature is currently in preview within early access environments and is disabled by default. Administrators must actively enable it before developers can use it. If they choose not to enable it, existing Copilot Studio agents and workflows will continue to operate normally.
On the other hand, Elon Musk, replying to Microsoft CEO Satya Nadella’s post, confirmed that the Grok 4.20 is coming soon. However, the details about the release and features remain under wraps.
Follow Us
Ashish Singh
Ashish Singh is the Chief Copy Editor at Digit. He's been wrangling tech jargon since 2020 (Times Internet, Jagran English '22). When not policing commas, he's likely fueling his gadget habit with coffee, strategising his next virtual race, or plotting a road trip to test the latest in-car tech. He speaks fluent Geek. View Full Profile
