xAI opens Grok Build beta, offers SuperGrok Heavy access for $300

xAI opened an early beta of Grok Build on May 14, adding a coding agent and command-line interface to its Grok product lineup. The company said the tool is available first to SuperGrok Heavy subscribers, a paid tier that starts at $300 a month. xAI described Grok Build as a product for “professional software engineering and complex coding work,” according to its launch post. Public documentation published the same day shows the tool running in a terminal interface and through scripts or bots. ### What exactly did xAI launch on May 14? xAI said on May 14 that Grok Build is a “new coding agent” that runs from the terminal and is entering an early beta. The company said it would use feedback from early users to improve both the model and the product. The xAI documentation published alongside the launch says Grok Build can be used in an interactive terminal user interface, in headless scripts or bots, or through the Agent Client Protocol in other apps. (x.ai) The docs also show a shell-based install flow and a basic command to start a session inside a project directory. ### Who can use it, and what does the $300 buy? SuperGrok Heavy subscribers are the first users eligible for the beta, according to xAI’s announcement. (x.ai) Multiple reports published after the launch said the SuperGrok Heavy plan starts at $300 per month, tying Grok Build access to xAI’s highest-priced consumer-facing subscription tier now publicly associated with the product. xAI’s own business documentation describes SuperGrok Heavy as an upgraded license for “demanding workloads,” but the company’s public launch materials for Grok Build did not set out separate beta pricing for the tool itself. (docs.x.ai) The available materials instead point users to the subscription tier as the access path. ### What can Grok Build do inside a workflow? xAI’s documentation says Grok Build supports a planning mode, scripting, and integrations through ACP. (x.ai) One page says plan mode blocks write tools except for the session plan file, allowing users to sketch an approach before making changes. The docs also say the product can run headlessly and connect with other apps, which places it in the category of coding agents meant to work beyond a chat window. xAI has not, in the cited launch materials, published a broader feature comparison against rival coding agents. (docs.x.ai) That comparison is an inference from the product format and documentation, not a company statement. (docs.x.ai) ### Did xAI publish broader API or enterprise terms with this beta? xAI’s developer documentation already lists API quickstart materials, model pages and pricing for some model and tool usage, including separate entries for models and agent pricing. But the Grok Build launch materials reviewed here do not specify a separate enterprise contract structure or standalone usage-based price for Grok Build itself. (docs.x.ai) The company’s Grok Business documentation describes workspace and license management for teams, including upgraded licenses for SuperGrok Heavy. Those pages do not, in the cited text, spell out a separate enterprise announcement tied specifically to the May 14 Grok Build beta. ### Where does this leave developers looking for next steps? May 14 is the key date for developers because that is when xAI published both the launch post and the getting-started materials. (docs.x.ai) The company’s docs now include installation instructions, command references and usage modes for the beta. xAI said in its launch post that the beta is intended to gather feedback, and the current public path is through the SuperGrok Heavy subscription. (docs.x.ai) As of May 19, the clearest next step for prospective users is the documentation and launch page xAI published for Grok Build, while any broader pricing or enterprise terms would need to come from later xAI updates. (x.ai)