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Introducing Muse Spark 1.1

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Introducing Muse Spark 1.1

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Introducing Muse Spark 1.1 Simon Willison’s Weblog Subscribe smallhead Sponsored by: Teleport — How do you ensure that A...

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Introducing Muse Spark 1.1

Simon Willison’s Weblog

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9th July 2026 - Link Blog

Introducing Muse Spark 1.1 . Following Muse Spark in April , here's Muse Spark 1.1 - the first Spark model to offer an API. Meta claim significant improvements in agentic tool calling and computer use.

There are a lot more details are in the Muse Spark 1.1 Evaluation Report . The "Attractor States in Self-Conversation" part is fun, where having two copies of the model talk to each other results in statements like these:

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.

I had a few days of preview access which was long enough to put together llm-meta-ai , a new plugin for LLM providing CLI (and Python library) access to the model. Here's how to try that out:

code
uv tool install llm
llm install llm-meta-ai
llm keys set meta-ai
# paste API key here
llm -m meta-ai/muse-spark-1.1 "Generate an SVG of a pelican riding a bicycle"

Here's that pelican transcript :

Posted

9th July 2026

at 4:24 pm

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This is a link post by Simon Willison, posted on 9th July 2026 .

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