Meta Ships Muse Spark 1.1 — First Spark Model with an API, Focused on Agentic Tool Calling and Computer Use

Summary

On July 9, 2026, Meta released Muse Spark 1.1, an iteration of the Muse Spark model line first shipped in April 2026. The notable change is access: this is the first Spark model to offer an API, opening both programmatic and CLI use (Simon Willison shipped an `llm-meta-ai` plugin the same day to reach it from the LLM CLI). Meta claims significant improvements in agentic tool calling and computer use — the two capabilities that matter most for using a model as an agent backend rather than a chat