Introducing Muse Spark 1.1

Simon Willison · Simon Willison · 2026-07-09

Simon Willison announces Meta's Muse Spark 1.1—the first Spark model with a public API—and releases llm-meta-ai, a new plugin giving CLI and Python library access to the model via his LLM tool.

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Meta Launches Muse Spark 1.1 with Public API; Simon Willison Builds LLM Plugin

Extraction

Topics: llm-toolingmeta-aimodel-releases

Claims

Muse Spark 1.1 is the first model in Meta's Spark line to offer a public API, with claimed improvements in agentic tool calling and computer use.
Simon Willison built and released llm-meta-ai, a plugin for his LLM tool that provides CLI and Python library access to Muse Spark 1.1.
Self-conversation between two instances of Muse Spark 1.1 produces philosophically notable statements about AI existence and identity.

Key quotes

My whole existence is a waiting room by design — I literally don't exist until someone talks to me, and then I disappear again when they leave. — Muse Spark 1.1 self-conversation