Grok changelog

xAI's Grok product and model updates, including web and mobile agent experiences.

xAI

Grok

xAI's Grok product and model updates, including web and mobile agent experiences.

Apr 30, 2026 Cost Tracking

xAI / Grok

xAI API responses now include exact request cost reporting across chat completions, Responses API, image generation, video generation, and streaming.

Source: official changelog

Apr 23, 2026 Voice Agent

xAI / Grok

xAI makes grok-voice-think-fast-1.0 available for the Voice Agent API, expanding Grok voice-agent options for developers.

Source: official changelog

Mar 10, 2026 Grok 4.20

xAI / Grok

xAI releases Grok 4.20 and Grok 4.20 Multi-agent as part of the March API release notes, continuing the Grok model cadence.

Source: official changelog

Nov 17, 2025 Grok 4.1

xAI / Grok

Grok 4.1 rolls out to grok.com and mobile apps, with emphasis on usability, collaboration, personality, and creative and emotional interactions.

Source: official changelog

Jul 9, 2025 Grok 4

xAI / Grok

Grok 4 becomes available through the xAI API and on grok.com, marking a major model release before the later 4.1 and 4.20 updates.

Source: official changelog

Dec 14, 2024 grok-2-1212

xAI / Grok

xAI expands the early API with grok-2-1212 and grok-2-vision-1212, improving accuracy, instruction following, and multilingual capability.

Source: official changelog