Release Notes
The release notes timeline highlights new features, bug fixes, and improvements implemented in Hyperstack.
Build a Knowledge Base from your own text and Markdown files on the new Knowledge Bases page, then select it in the Text Playground so models answer from your content instead of their training data alone. Learn more.
- Manage your files: Add and remove files at any time, follow indexing progress as it runs, and cancel indexing you no longer need from the Knowledge Base detail page.
- Cited sources: Grounded replies carry numbered citation markers. Hover over one to see the source file, an excerpt of the passage, and how relevant it was scored.
- API support: Manage knowledge bases programmatically with the new Knowledge Bases APIs, and ground a message by passing a knowledge base to the Send message endpoint.
- UI / API toggle in compare mode: In Compare Side-by-Side, the toggle now appears once, on the left panel, and applies to both panels when you switch between UI and API.
- Clearer errors for tool and function definitions: The Create chat completion API now returns a descriptive error when a request carries tool or function definitions it cannot process, in place of the generic failures that varied by model.
Kimi K3 is now available as a third-party model in AI Studio. Select it in the Text Playground, or call it through the API as moonshotai/Kimi-K3. The model accepts both text and image input, returns text, and supports a 1 million token context window.
Images in the Text Playground: Image-to-text models are now supported. You can attach an image to your message and have the model describe it or answer questions about it. Learn more.
- New image-to-text models: A catalog of image-to-text models is now available in the Model Catalog - Base Models, where you can filter by the Image-to-Text modality.
- API support: The Create chat completion endpoint now accepts multimodal message content for images.
Conversation history: Text Playground sessions are now saved to your conversation history. Browse, rename, and delete past conversations from the History tab, with full message history including any attached images. Manage conversations programmatically with the Conversations APIs.
- Clearer error messaging: When a transient backend issue interrupts a request, you now see a clear retry message instead of a generic credit-related error.
Image Playground: A new dedicated Image Playground is now available alongside the existing Text Playground. Generate and edit images using a catalog of image generation models (vision models), with customizable parameters and a side-by-side compare feature for evaluating multiple models at once. Learn more.
- Text-to-image generation: Generate images from a text prompt using any supported image generation model (text-to-image vision models). Learn more.
- Image-to-image editing: Upload a reference image alongside a text prompt to generate a modified or transformed result using image generation models (image-to-image vision models). Learn more.
- API view with cURL support: The Image Playground includes a UI / API toggle. Switching to API view displays the corresponding cURL command for your current request, adapting dynamically for text-to-image (Generate image from text) and image-to-image (Generate image from image) workflows. Learn more.
Vision models: A new catalog of image generation models (vision models) is now available, powering the Image Playground. You can browse and filter by modality (text-to-text, text-to-image, and image-to-image) in the Model Catalog - Base Models. The same modality filter is also available via the API using the
modalitiesquery parameter on List base models.Vision models pricing: A new Vision Models Pricing page is now available, covering pricing for text-to-image and image-to-image models. Learn more.
Image generation billing: Image generation is billed per 16×16 patch (1 patch = 256 pixels, or a 16×16 pixel region of generated output). A dedicated Image Generation Usage Report is now available under Billing - Resource Activity. Billing history is also available via the API. Learn more.
Gemma-4 model inference: Fixed an issue that prevented the
pearl-ai/Gemma-4-31B-it-pearlthird-party hosted model from loading for inference.Model Catalog icons: Added icons for new third-party models so each model displays its correct icon in the Model Catalog and Playground model selector.
Model pricing updates: Improved the reliability of automated pricing updates for third-party models.
Kimi model stability: Fixed an issue that prevented Kimi models from running successfully.
Qwen model compatibility: Resolved an issue where Qwen models could return errors when using default inference settings.
Improved API key access for team members: Fixed an issue where newly invited organization members were unable to use API keys until logging in via the UI.
Platform enhancements: Improvements to usability and overall platform experience.
Model Catalog third-party inference link: Added a “Learn more” link to the Model Catalog - Base Models page explaining third-party inference usage.
General UI improvements: Various interface improvements across AI Studio, including clearer GPU naming, improved model catalog visuals, and updated form text for better clarity and consistency.
Introduced the Hyperstack MCP (Model Context Protocol) Server, enabling natural-language infrastructure management through MCP-compatible AI clients such as Claude Desktop and Open WebUI. The MCP Server translates plain English instructions into secure, authenticated Hyperstack API operations, allowing users to create, manage, and monitor infrastructure resources without writing manual API calls.
Get started with our Quickstart Guide
Explore all MCP Server documentation
Third-party hosted models: AI Studio now offers selected third-party models for inference-only, accessible directly from the Playground. Learn more.
Persistent Playground chat: The Playground now supports persistent chat sessions, retaining conversation history, selected model, prompts, and parameter settings across page refreshes and logins.