Grok

xAI has released Grok Build 0.1, a coding-specialized model with a 256K context window and unlimited text output. The model is designed for agentic software engineering workflows and powers xAI's Grok Build CLI tool.

xAI is deploying Grok to Apple CarPlay following iOS 26.4's April 2026 update that introduced a Voice Control template for third-party AI chatbots. The move puts Grok alongside ChatGPT, Perplexity, Claude, and Gemini on 800 million iPhones, marking xAI's first deployment outside the Musk ecosystem.

xAI has released Grok 4.3, a reasoning model with a 1 million token context window and no output token limit. The model accepts text and image inputs, has always-on reasoning that cannot be disabled, and uses tiered pricing starting at $1.25 per million input tokens and $2.50 per million output tokens.

X has launched Grok-powered Custom Timelines for Premium subscribers on iOS, offering over 75 AI-curated topic feeds that can be pinned to the home tab. The feature uses xAI's Grok to analyze and label posts by topic rather than relying on keywords or hashtags, and arrives alongside the shutdown of X Communities.

xAI's Grok 4.20 scores 48 on Artificial Analysis' Intelligence Index—6 points ahead of Grok 4 but trailing Gemini 3.1 Pro Preview and GPT-5.4 at 57. The model distinguishes itself with a 78% non-hallucination rate on the AA Omniscience test, the highest recorded across any model tested.