xAI Unveils Five Major Grok Updates in May, Including Grok Skills and Grok 4.3

May 2026 has proven to be a particularly dynamic month for xAI, as the company has introduced a series of substantial updates to its Grok AI platform. These developments aim to enhance Grok's capabilities, improve user experience, and expand its integration within the broader AI ecosystem. One of the most significant new features is **Grok Skills**, officially launched on May 18th after being spotted in early development. This functionality allows users to define and retain custom expertise for Grok across all interactions, whether on the web platform, iOS, or Android applications. Users can create these skills using natural language descriptions or by uploading files, enabling Grok to automatically apply defined workflows, preferences, and document-handling routines without requiring repeated instructions in subsequent sessions. This includes capabilities for generating and editing Word documents while preserving formatting, headings, and styles. Another major release is **Grok 4.3**, which debuted on May 4th as xAI's current cost-efficient flagship model. This iteration boasts built-in reasoning, a substantial 1-million-token context window, and native video input, representing a considerable advancement over its predecessor, Grok 4.20. According to xAI, Grok 4.3 achieved a score of 53 on the Intelligence Index and gained over 300 Elo points on GDPval-AA, positioning it as a competitive option for developers seeking high-performance AI at a more accessible price point of $1.25 per million input tokens. xAI also introduced **Grok Build 0.1** in early access on May 14th. This is a specialized coding model specifically engineered for agentic workflows, meaning it is designed to execute multi-step actions rather than merely answering questions. Grok Build 0.1 supports both text and image inputs, generates text outputs, and features a 256,000-token context window. The API pricing for this model is set at $1 per million input tokens and $2 per million output tokens. Access to Grok Build 0.1 has been extended to SuperGrok and X Premium subscribers. Further expanding its reach, xAI integrated Grok with **OpenClaw**, an open-source AI agent platform, on May 19th. This integration allows Grok and X Premium subscribers to authenticate directly within OpenClaw, granting them access to chat, image generation, and video generation functionalities through their existing subscriptions, without the need for a separate xAI account or API key. This move places Grok alongside other leading AI models within a platform already utilized by developers for building autonomous agents. These rapid updates in May underscore xAI's aggressive development strategy, aiming to solidify Grok's position in the competitive generative AI landscape by offering advanced capabilities, improved efficiency, and broader platform integrations.