llama.cpp's built-in web UI for testing local models

Melvin Vivas · X post · 2026-09-09 · Open on X

Topics: LLMOps, Deployment & Monitoring, AI Dev Tools & Productivity · Level: beginner

Summary

The default web UI that comes with llama.cpp is now good enough for testing local inference. It lets you pick a model and change reasoning levels, so you don't need a separate chat tool.

Key points

• llama-server includes a web chat UI out of the box.
• It supports model selection and changing reasoning levels.
• It removes the need for a separate tool just to test inference.

Resources mentioned

• llama.cpp · repo · github.com · free
  An open-source C/C++ engine for running GGUF models locally. Its llama-server command provides an OpenAI-compatible HTTP server.
  Also in: Running LLMs Locally Without an Expensive Rig (Melvin Vivas on X · notes), llama.cpp / Llama-macOS v0.5.0 release (Melvin Vivas on X · notes), Run llama.cpp GGUF Checkpoints in Hugging Face Transformers (Melvin Vivas on X · notes), llama.cpp v0.4.1 release announcement (Melvin Vivas on X · notes) and 28 more

Try this

• Use llama.cpp's built-in web UI to quickly test local model inference.