LM Studio 0.4.8

March 26, 2026·Build 1

0.4.8 - Release Notes

Build 1

  • Add support for reasoning_effort and reasoning_tokens in OpenAI-compatible v1/chat/completions
  • Adds a reasoning field to the /api/v1/models API response, indicating each model's supported reasoning capabilities/REST configuration options learn more
  • Fixed a bug where Insert in chat input would sometimes not work after toggling assistant and user mode
  • Fixed a bug where surrounding spaces in tool call parameters would be stripped for models that uses XML/XML-like tool call formats
  • [CUDA] Fixed issue where some VRAM would not be deallocated under certain conditions
  • Fixes a bug where setting reasoning to low when using Nemotron 3 Super via the /api/v1/chat or OpenAI-compatible /v1/responses API would error out
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