Grok API changelog & release notes

grok-voice-transcribe-1.0 is deprecated and reaches end of life on October 2, 2026. All requests to that slug are routed to grok-voice-transcribe-2.0 at the same price, with…

You can now send safety_identifier , an opaque end-user identifier assigned by your application, on Chat Completions, the Responses API, deferred chat completions, the Batch API,…

grok-voice-transcribe-2.0 is now available. Use grok-voice-transcribe-1.0 or grok-voice-transcribe-2.0 ; the default is grok-voice-transcribe-2.0 . See the Speech to Text docs .…

On November 2, 2026, grok-imagine-image-quality is retired. Requests to the slug will be served by grok-imagine-image-2.0 with quality set to low , with no change to the request…

Auto quality. The quality parameter on grok-imagine-image-2.0 now accepts auto , and the default when quality is omitted has moved from medium to auto . Auto currently uses low…

grok-imagine-video-1.5 now supports text-to-video, image-to-video, and reference-to-video (including optional preset voices), with native 1080p for T2V and I2V. Text-to-video on…

grok-voice-think-fast-2.0 is now available with Speech to Speech. grok-voice-latest will route to this model starting August 5, 2026. To get started, see the Speech to Speech…

Speech to Text now accepts a vad_threshold parameter (streaming query param and batch multipart field) to tune the voice-activity gate that skips non-speech audio. Lower values…

Grok 4.5 is now available in the API console for EU users. See the Grok 4.5 overview . <div class="relative"

You can now request higher scheduling priority per request by setting service_tier: "priority" on text inference endpoints (Chat Completions and Responses). The response's…

Public URLs for Files — turn any file in your Files API storage into a permanent, unauthenticated URL that anyone can open, embed, or share. Revocable at any time, or set an…

The streaming Speech to Text API now supports Smart Turn end-of-turn detection. When enabled via the smart_turn query parameter, an ML model predicts whether the speaker has…

The Context Compaction API is now available. You can shrink long conversations into a shorter context and reuse it in follow-up requests for lower cost, faster…

Web Search now supports explicitly searching for images. Enable enable_image_search to let Grok search directly for relevant images; responses can include returned images as…

SpaceXSI's coding model, trained specifically for agentic coding workflows. Currently in early access. The model slug is grok-build-0.1 . <div class="relative"

You can now clone a voice from a short audio clip and use it across the Text-to-Speech and Speech to Speech APIs. Create and manage your voice catalog from the xAI console. For…