--- name: Release Notes slug: release-notes type: scrape source_url: https://docs.x.ai/developers/release-notes organization: xAI organization_slug: xai total_releases: 27 latest_date: 2026-05-19 last_updated: 2026-05-26 tracking_since: 2024-11-19 canonical: https://releases.sh/xai/release-notes organization_url: https://releases.sh/xai --- ## Grok Build 0.1 xAI's fast coding model trained specifically for agentic coding, currently in early access. The model slug is `grok-build-0.1`. ## Grok Build Grok Build is now available in beta. Use the interactive TUI, run headlessly in scripts, or build apps and orchestrators with the Agent Client Protocol. Install with a single command: ```bash curl -fsSL https://x.ai/cli/install.sh | bash ``` ## Custom Voices You can now clone a voice from a short audio clip and use it across the Text-to-Speech and Voice Agent APIs. Create and manage your voice catalog from the xAI console. ## Cost Tracking Every API response now includes the exact cost of the request via a `cost_in_usd_ticks` field in the `usage` object. Works across chat completions, Responses API, image generation, video generation, and streaming. ## Files API TTL You can now set an expiration policy on uploaded files using `expires_after` or an explicit `expires_at` timestamp. Expired files are automatically deleted. ## Grok Voice Think Fast 1.0 is available You can now use `grok-voice-think-fast-1.0` with the Voice Agent API. See the [blog post](https://x.ai/news/grok-voice-think-fast-1) for more details. ## Speech to Text is available The xAI Speech to Text API is now generally available. Transcribe audio to text in 25 languages with batch and streaming modes. ## Text-to-Speech is available The Text-to-Speech API is now generally available. Generate natural-sounding speech from text with Grok. ## Batch API supports Image and Video generation The Batch API now supports image generation, image editing, and video generation in addition to chat completions. Both server-side tools and client-side function tools are also now supported in batch requests. Image and video URLs in batch results expire after 1 hour. ## Provisioned Throughput is available Enterprise customers can now purchase dedicated API capacity with guaranteed tokens per minute. ## Grok 4.20 and Grok 4.20 Multi-agent are live Grok 4.20 and Grok 4.20 Multi-agent models are now live. See the [Multi-agent docs](https://docs.x.ai/developers/release-notes/developers/model-capabilities/text/multi-agent) for details on the multi-agent variant. ## Video Generation & Next-Gen Image Generation Video Generation and a revamped Image Generation are now available via the API. ## Grok Voice Agent API is released Grok Voice Agent API is generally available. ## Agent tools adapt to Grok 4.1 Fast models and tool prices dropped - You can now use Grok 4.1 Fast models with the agent tools. - The price of agent tools drops by up to 50% to no more than $5 per 1000 successful calls. ## Grok 4.1 Fast is available in Enterprise API You can now use Grok 4.1 Fast in the xAI Enterprise API. See the [blog post](https://x.ai/news/grok-4-1-fast) for more details. ## Responses API is generally available The stateful Responses API is now generally available to process requests. ## Collections API is released You can upload files, create embeddings, and use them for inference with the Collections API. ## Grok 4 is released Grok 4 is now available via the API or on https://grok.com. ## Management API is released You can manage your API keys via the Management API at https://management-api.x.ai. ## Live Search is available on API Live search is now available on the API. Users can generate completions with queries on supported data sources.