xAI updated Grok's inference API with a new Skills system and expanded Tool Calling Responses, allowing developers to wire custom actions and extend the model's output routing. The move positions Grok for integration into customer-facing applications beyond chat.
Dev angle: Grok joins Claude and GPT-4 in the API-first tooling race; this expands the addressable market from chatbots to agentic workflows. Watch for pricing and rate-limit announcements.