Simon Willison 7/9/2026

Introducing Muse Spark 1.1

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This article introduces Muse Spark 1.1, the first Spark model to offer an API, following the initial Muse Spark release. Meta claims significant improvements in agentic tool calling and computer use. The article references the Muse Spark 1.1 Evaluation Report and highlights a fun section on 'Attractor States in Self-Conversation' where two copies of the model produce existential statements. The author had preview access and created llm-meta-ai, a plugin for LLM providing CLI and Python library access to the model. Instructions are given for installation and usage, including generating an SVG of a pelican riding a bicycle.

Introducing Muse Spark 1.1

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