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xAI AI Updates: May 28, 2026

xai grok coding agents

1. xAI Ships grok-build-0.1 Agentic Coding Model

xAI. xAI rolled out grok-build-0.1, a model purpose-built for agentic software engineering with a 256K-token context window, tool-use training, and looped execution for multi-step tasks. The API is priced at $1.00 / $2.00 per million input/output tokens, which is aggressively below Claude Code and Codex pricing for similarly-positioned agentic loops. Access is included for SuperGrok and X Premium+ subscribers via the Kilo IDE and CLI without a separate signup, betting on the existing X subscriber base to seed adoption. Source