xAI's lightweight model that thinks before responding. Great for simple or logic-based tasks that do not require deep domain knowledge. The raw thinking traces are accessible. The fast model variant is served on faster infrastructure, offering response times that are significantly faster than the standard. The increased speed comes at a higher cost per output token.
import { streamText } from 'ai'
const result = streamText({ model: 'xai/grok-3-mini-fast', prompt: 'What is the history of the San Francisco Mission-style burrito?'})Try out Grok 3 Mini Fast Beta by xAI. Usage is billed to your team at API rates. Free users get $5 of credits every 30 days, and you are considered a free user if you haven't made a payment.