LM Studio 0.4.0 - Release Notes
Welcome to LM Studio 0.4.0 👾!
- We're excited to introduce the next generation of LM Studio.
- New features include:
llmster: the LM Studio Daemon for headless deployments w/o GUI on servers or cloud instances- Parallel inference requests (instead of queued) for high throughput use cases
- New stateful REST API with local MCP server support -
POST /v1/chat
- A completely revamped UI experience ✨
Build 18
- Fixed a bug where sometimes vision models would not accept images
Build 17
- MCPs will now only be loaded when needed, instead of at app startup
- Fixed a bug where some fields in app settings could get reset after update
Build 16
- New icons and placements for Discover, My Models buttons
- Fixed a bug where generators wouldn't show in the top bar model picker when selected
- Fixed a bug which prevented additional quantizations from being downloaded for staff pick models that were already downloaded
- Fixed a bug where
lms import will sometimes not work properly if it llmster (daemon) is also installed
- Fixed a bug in
/api/v1/chat that caused server errors when inputs were empty or top_k exceeded 500
- Fixed a bug where
lms ls and lms load sometimes would fail after waking up the LM Studio service
- Fixed a bug where sometimes token counting would not work properly for gpt-oss models
Build 15
- Introduce Parallel Requests with Continuous Batching 🚀
- When loading a model, you can now select n_parallel to allow multiple requests to be processed in parallel.
- When enabled, instead of queuing requests one by one, the model will process up to N requests simultaneously.
- By default, parallel slots are set to 4 (with unified KV set to true, which should result in no additional memory overhead).
- This is supported for LM Studio's llama.cpp engine, with MLX coming later.
- Introducing Split View in Chat: view two chats side by side.
- Drag and drop chat tabs to either half of the window to split the view.
- Close one side of the split view with the 'x' button in the top right of each pane.
- Introducing 🔧 Developer Mode: a simplification of the previous Developer/Power User/User 3 mode switch.
- Developer Mode combines the previous Developer and Power User modes into a single mode with all advanced features enabled.
- You can turn on Developer Mode in Settings > Developer.
- New setting: enforce allowing only one new empty chat at a time (default: enabled)
- Change in Settings > Chat
- New 🔭 Model Search experience
- Access via the 🔍 button on the top right or by pressing Cmd/Ctrl + Shift + M
- Model format filter preferences persist between app restarts
- Modal is resizable and remembers its size between app restarts
- Limit number of open tabs to 1 per pane. Support showing 2 side-by-side chat tabs.
- Selecting a new chat replaces the current tab in that pane.
- Add button to create a new chat in the sidebar
- Pressing Cmd/Ctrl + L while the model picker is open will dismiss it
- On narrow window size show right hand sidebar as an ephemeral overlay
- Support for the LFM2 tool call format
- CLI now uses commit hash for versioning instead of semantic version numbers
- Updates to UI details in hardware settings
- Fixed a bug where moving large number of conversations would sometimes only move part of them
- Fixed a bug where
lms ls sometimes would show incomplete list of models on startup
- Fixed a bug in deleting tool confirmation preferences in settings
- Fixed a UI bug in app onboarding
- Fixed a visual bug in Models Table selected row affecting the Architecture and Format columns
- Fixed a bug where undoing pasted content in chat input would not work as expected
- Fixed a bug where a leading decimal in a numeric input would parse as a 0
- Fixed a bug rendering multiple images in a conversation message
- Fixed a bug where a documentation sidebar section would sometimes get stuck in expanded state
- Fixed a bug where chat names would sometime be empty
- Fixed a visual bug in rendering keyboard shortcuts on Windows and Linux
- Fixed a bug where model loader would sometimes close due to mouse move shortly after opening
- Fixed a bug rendering titles in preset conflict resolver dialog
- Fixed a bug where reloading with new load parameters would not apply next time the same model is used for a chat
- Fixed a bug where the model loading will get stuck if the cpu moe slider is maxed out
- Fixed a bug where exporting chats with very large images to PDF would fail
- Fixed a responsive UI overlap bug in the app header
- [Windows] Fixed a bug where the default embedding model will not be available after in-app update
- Adds download, copy, and reveal in working directory buttons to generated images in chat
Build 14
Build 13
- App setting to control primary navigation position: 'top' or 'left'
- [Mac] New tray menu icon 👾 (experimental, might change)
/api/v1 endpoints and /v1/responses API now return better formatted errors- Significantly reduce the size of the app update asset
Build 12
- Bugfix: New chats to be created with the same model as the previously focused chat
- Bring back gear button to change load parameters for currently loaded model
- Bring back context fullness indicator and current input token counter
- New in My Models: right-click on tab header to choose which columns to show/hide
- New in My Models: Capabilities and Format columns
- Fixed a flicker in model picker floating panel upon first open
- P.S. you can open the model picker from anywhere in the app with Cmd/Ctrl + L
- Fixed focus + Enter on Eject button not working inside model picker
- Updated chat terminal and messages colors and style
- Fixed dragging and dropping chats/folders in the sidebar
Build 11
- ✨👾 Completely revamped UI - this is a work in progress, give us feedback!
- [CLI] New
lms chat experience!
- Support slash commands, thinking highlighting and pasting larger content
- Slash commands available: /model, /download, /system-prompt, /help and /exit
- [CLI] New:
lms runtime survey to print info about available GPUs!
- FunctionGemma support
- Added a slider to control n_cpu_moe
- New REST API endpoint:
api/v1/models/unload to unload models
- Breaking change: in
api/v1/models/load endpoint response, introduced in this beta, model_instance_id has been renamed to instance_id.
- Display live processing status for each loaded LLM on the Developer page
- Prompt processing progress percentage -> token generation count
- Improved PDF rendering quality for tool requests and responses
- Significantly increased the reliability and speed of deleting multiple chats at once
- Updated style of chat message generation info
- Updated layout of Hardware settings page and other settings rows
- Fixed a bug where sometimes models are indexed before all files are downloaded
- Fixed a bug where exporting larger PDFs would sometimes fail
- Fixed a bug where pressing the chat clear hotkey multiple times would open multiple confirmation dialogs
- Fixed a bug where pressing the chat clear hotkey would sometimes duplicate the chat
- Fixed a bug where pressing the duplicate hotkey on the release notes would create a glitched chat tab
- Fixed a bug where
lms help would not work
- Fixed a bug where deletion models or canceling downloads would leave behind empty folders
- Fixed a styling bug in the GPU section on the Hardware page
- [MLX] Fixed a bug where the bf16 model format was not recognized as a valid quantization
Build 10
Build 9
Build 8
- Fixed a bug where the default system prompt was still sent to the model even after the system prompt field was cleared.
- Fixed a bug where exported chats did not include the correct system prompt.
- Fixed a bug where the token count was incorrect when a default system prompt existed but the system prompt field was cleared.
- Fix a bug where sometimes the tool call results are not being added to the context correctly
- Fix chat clearing with hotkey (Cmd/Ctrl + Shift + Option/Alt + D) would clear wrong chat
- Fix a bug where Ctrl/Cmd + N would sometimes create two new chats
- Updated style for Integrations panel and select
- Fixed cURL copy button for embedding models displaying additional incorrect requests
- Fix "ghost chats" caused by moving conversations/deleting conversations
Build 7
- Fix jinja prompt formatting bug for some models where EOS tokens were not being included properly
- Bring back release notes viewer for Runtime available update
- Prevent tooltip from staying open when hovering tooltip content
- Fix a bug in deleting multiple chats at once
- Minor fix to overlapping labels in model loader
- Support for EssentialAI's rnj-1 model
Build 6
- Fixed a bug where Qwen3-Next user messages would not appear in formatted prompts properly
Build 5
- Fixed a bug where quickly deleting multiples conversations will sometimes soft-lock the app
- Fixed another bug that prevented the last remaining open tab from being closed
Build 4
- Fixed a bug where the last remaining open tab sometimes could not be closed
- Fixed a bug where
lms log stream would exit immediately
- Fixed a bug where the server port would get printed as [object Object]
- Image validation checks in
v1/chat and v1/responses REST API now run without model loading
- Fixed a bug where images without extensions were not classified correctly
- Fix bug in move-to-trash onboarding dialog radio selection where some parts of the label were not clickable
- Fix several clickable areas bugs in Settings windows buttons
- Fixed a bug where certain settings may get adjusted unexpectedly when using llmster (for example, the JIT model loading may become disabled)
- New and improved Runtime page style and structure
- Fixes a bug where guardrail settings were not showing up in User UI mode
- Fixed a bug where
lms log stream would exit immediately
Build 3
- Introducing 'llmster': the LM Studio Daemon!
- True headless, no GUI version of the process that powers LM Studio
- Run it on servers, cloud instances, or any machine without a graphical interface
- Load models on CPU/GPU and serve them, use via
lms CLI or our APIs
- To install:
- Linux/Mac:
curl -fsSL https://lmstudio.ai/install.sh | bash
- Windows:
irm https://lmstudio.ai/install.ps1 | iex
- Support for MistralAI Ministral models (3B, 8B, 13B)
- Improved
lms output and help messages style. Run lms --help to explore!
- Get llama.cpp level logs with
lms log stream -s runtime in the terminal
lms get interactive mode now shows the latest model catalog options- New and improved style for Downloads panel
- New and improved style for App Settings
- We're trying something out: Model search now in its own tab
- still iterating on the UI for this page, please give us feedback!
Build 2
- Show release notes in a dedicated tab after app updates
- Add support to display images in exported PDFs and exported markdown files
- Quick Docs is now Developer Docs, with refreshed documentation and direct access from the welcome page.
- Allow creating permission tokens without allowed MCP permissions
- Fixed a bug where sometimes images created by MCPs are not showing up
- Fixed a bug where sometimes the plugin chips not working
- Fixed a bug where the "thinking" blocks will sometimes expand erroneously
- Fixed a bug where certain tabs would not open correctly
- Fixed a bug where sometimes the model list would not load
- Fixed a bug where in-app docs article titles would sometimes wiggle on scroll
- Fixed a visual bug in Preset 'resolve conflicts' modal
- Fixed a bug where sometimes Download button would continue showing for an already downloaded model
- Fixed a bug where chat sidebar buttons wouldn't be visible on narrow screens
- Display model indexing errors as buttons rather than hints
Build 1
- Welcome to the 0.4.0 Beta!