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text-generation-webui 4.1 released with tool-calling support in the UI! Each tool is just 1 .py file, check its checkbox and press Send, as easy as it gets to create and use your own custom functions.

Reddit r/LocalLLaMA / 3/17/2026

📰 NewsTools & Practical Usage

Key Points

  • text-generation-webui has released version 4.1, introducing tool-calling support directly in the UI.
  • Each tool is implemented as a single Python file, and users can enable it by checking a box and pressing Send to create and use custom functions.
  • The update lowers the barrier to extending LLM capabilities with custom tools, enabling easier prototyping and integration without code changes.
  • The release is publicly documented with a GitHub release tag (v4.1) and associated discussions linked in the post.