Simon Willison • 8/10/2026

Introducing Muse Glimmer

This article discusses Meta's new Muse Glimmer model, a 30B parameter open-weights model released under Apache 2.0. It highlights the model's strengths in end-to-end agentic task completion, reliable tool use, and multi-step reasoning, with benchmarks like SWE-Bench. The author tests the model using LM Studio and an llm-coding-agent plugin, demonstrating its ability to explore codebases and describe images. The article also notes the model's suitability for local use on machines with 32GB+ RAM.

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#agentic ai #Open Weights #Meta