LM Studio 0.4.7

0.4.7 - Release Notes

Build 4

• Fixed a bug when trying to edit an empty chat message

Build 3

• Fixed unintended parsing of tool calls within reasoning blocks
• Fixed a bug where parallel tool calls would fail for some models (for example, GLM)
• Fixed a bug in OpenAI-compatible /v1/responses which sometimes caused "Output items missing; timeline invariant violated"
• Fixed $...$ parsing so plain currency/text (for example $10, $1.23, $37 trillion) is no longer incorrectly rendered as math
• Fixed single-dollar boundary handling to reduce false positives when $ appears in normal prose
• Fixed \[ \] and \( \) handling so bracket/paren math parses correctly, and empty forms stay visible as literal text
• Fixes responsive handling of models table on narrow screens, adds resizable column handles
• Fixed a bug where Anthropic-compatible /v1/messages API would error when properties were not provided for a tool input schema
• Expose Models Directory selector in Settings
• Fixed tool calling parsing bugs for Qwen 3.5 and GLM models
  • Tool call parameters with string type were sometimes incorrectly parsed as object/number/boolean
• Added tool call grammar for gpt-oss models using llama.cpp engine, significantly increasing tool call success rate for these models (requires llama.cpp engines updated to v2.7.1 or later)

Build 2

• Global chat search now takes into account chat titles
• Add notification UI when LM Link versions are incompatible between devices
• Fixed a bug creating a duplicate onboarding popover on the LM Link page
• Make XML-like tool call parsing (e.g., Nemotron 3) more reliable for boolean values
• Fixed a bug where clicking the Attach File button in chat input would lock the text input UI
• Fixes a bug where
  tags were showing as text in markdown tables
• Fixed a responsive UI overlap bug on server page stacked content
• Fixed a bug where an unnamed chat title would appear as the chat id in the chat sidebar search results
• Fixed a bug where on certain devices, the app would crash if an image is fed to a vision model
• Fixed a bug where model load guardrails and resource usage estimates were inaccurate for some models
• Anthropic-compatible /v1/messages API now surfaces errors when the model generates an invalid tool call, enabling Claude Code to recover gracefully

Build 1

• New default: "separate reasoning_content and content in API responses" is now ON by default in order to improve compatibility with /v1/chat/completions clients
  • If your use case requires this setting to be off (previous default), you can disable it in the Developer Settings
• Fixed app header nav button hotkeys
• Add parallel parameter to /api/v1/load endpoint
• Add presence_penalty sampling parameter
• Fix hover effect visual bug on Model Picker model options in chat input
• Fixed responsive UI styling on the LM Link page
• [Linux] Fix regression caused by some app files having a space in their name.
• Fix OpenAI-compatible /v1/responses endpoint erroring on none and xhigh reasoning effort
• Fixed a bug where /v1/responses responses included logProbs for MLX models even if message.output_text.logprobs was omitted