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AI release notes

xAI's official release notes for Grok: new Grok models and what changed for developers building with them.

Compiled by the Toolstash team · Updated

  1. New modelAnnouncement

    Grok Voice Think Fast 1.0 is available

    You can now use grok-voice-think-fast-1.0 with the Speech to Speech API. To get started, check out the Speech to Speech docs.

  2. Grok API

    Batch API JSONL file upload

    You can now create batches by uploading a JSONL file via the Files API. Supports all batch endpoints including chat, image, and video in a single file.

  3. Grok API

    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.

  4. Grok API

    Text-to-Speech is available

    The Text-to-Speech API is now generally available. Generate natural-sounding speech from text with Grok.

  5. New model

    Grok 4.20 and Grok 4.20 Multi-agent are live

    For more details on Grok 4.20 Multi-agent, check out the docs

  6. Grok API

    Batch API is released

    Batch API is available for all customers. It enables efficient batch processing of multiple requests, providing a better experience for users who need to submit large volumes of requests at once.

  7. Grok API

    Video Generation & Next-Gen Image Generation

    Video Generation and a revamped Image Generation are now available.

  8. Grok API

    Grok Speech to Speech API is released

    Grok Speech to Speech API is generally available. Visit Grok Speech to Speech API for guidance on using the API.

  9. Grok API

    Files API is generally available

    You can now upload files and use them in chat conversations with the Files API.

  10. Grok API

    New Tools Available

    Collections Search Tool: You can now search through uploaded knowledge bases (collections) in chat conversations via the API. Remote MCP Tools: You can now use tools from remote MCP servers in chat conversations via the API. Mixing client-side and server-side tools: You can now mix client-side and server-side tools in the same chat conversation.

  11. New model

    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, check out the documentation of agent tools to get started. The price of agent tools drops by up to 50% to no more than $5 per 1000 successful calls, see the new prices at the pricing page.

  12. New modelAnnouncement

    Grok 4.1 Fast is available in Enterprise API

    You can now use Grok 4.1 Fast in the xAI Enterprise API.

  13. Grok API

    Tools are now generally available

    New agentic server-side tools including web_search, x_search, and code_execution are available.

  14. Grok API

    Responses API is generally available

    You can now use our stateful Responses API to process requests.

  15. Grok API

    Collections API is released

    You can upload files, create embeddings, and use them for inference with our Collections API.

  16. New model

    Grok 4 is released

    You can now use Grok 4 via our API or on https://grok.com.

  17. Grok API

    Management API is released

    You can manage your API keys via Management API at https://management-api.x.ai.

  18. Grok API

    Cached prompt is now available

    You can now use cached prompt to save on repeated prompts. For more info, see models.

  19. Grok API

    Live Search is available on API

    Live search is now available on API. Users can generate completions with queries on supported data sources.

  20. New model

    Grok 3 models launch on API

    Our latest flagship Grok 3 models are now generally available via the API. For more info, see models.

  21. New model

    Image Generation Model available on API

    The image generation model is available on API. Visit Image Generations for more details on using the model.

  22. Grok API

    Audit Logs

    Team admins can now view audit logs on console.x.ai.

  23. Grok API

    Docs Dark Mode

    Released dark mode support on docs.x.ai

  24. Grok API

    Status Page

    Check service statuses across all SpaceXSI products at status.x.ai.

  25. Grok API

    Replit & SpaceXAI

    Replit Agents can now integrate with SpaceXAI! Start empowering your agents with Grok. Check out the announcement for more information.

  26. Grok API

    Replit & SpaceXSI

    Replit Agents can now integrate with SpaceXSI! Start empowering your agents with Grok. Check out the announcement for more information.

  27. Grok API

    Replit & xAI

    Replit Agents can now integrate with xAI! Start empowering your agents with Grok. Check out the announcement for more information.

  28. Grok API

    Structured Outputs

    We're excited to announce that Grok now supports structured outputs. Grok can now format responses in a predefined, organized format rather than free-form text. 1.

  29. Grok API

    Tokenizer Playground

    Understanding tokens can be hard. Check out console.x.ai to get a better understanding of what counts as a token.

  30. New model

    Released the new grok-2-1212 and grok-2-vision-1212 models

    A month ago, we launched the public beta of our enterprise API with grok-beta and grok-vision-beta. We’re adding grok-2-1212 and grok-2-vision-1212, offering better accuracy, instruction-following, and multilingual capabilities.