Grok may soon get model slider with Expert, Heavy and Fast options

xAI continues to iterate on Grok’s interface, with a new web-only model selector UI spotted under a feature flag. This selector appears as a slider with three options: Expert, Heavy, and Fast. At present, Grok users can pick between Grok 3, Grok 4, and Grok 4 Heavy, but the Fast mode remains ambiguous. The likely scenario is that xAI intends to introduce a new, smaller model aimed at lower latency and cost, catering to those who need immediate answers or are operating with tighter resource constraints. This would potentially broaden Grok’s user base, benefiting users seeking a balance between speed and price, while still allowing more demanding users to access the higher-capacity models.

The second assumption in the community is that Grok 4 Heavy, currently not widely available, could be opened to SuperGrok subscribers, albeit with stricter usage limits. This would align with xAI’s approach of gradually scaling model access based on subscription tier and demand. The slider’s UI itself, reportedly resembling Apple’s liquid glass design system, could hint at future cross-platform moves. If xAI is developing a desktop client, possibly via Electron, which leverages web code, adopting this kind of modern, fluid UI would keep the app visually consistent across devices and operating systems.

While there’s no official timeline or public release date, the presence of these features behind feature flags suggests active internal testing. xAI’s broader product strategy appears focused on offering a flexible range of AI capabilities to suit various needs, from casual users to professionals. The company is positioning Grok not just as a chatbot but as a customizable productivity tool, and these latest leaks fit that direction. For now, the details remain under wraps, but this multi-modal selector could be a notable upgrade once it goes public.