Alex Getmanearly AI signals
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UpdatedMetamuse-spark-1.3

Muse Spark 1.3 spotted on DesignArena

Observed · 12 evidence linksFirst seen Updated Recorded automatically by Signal Forge

Muse Spark 1.3 is a model from Meta, released on 2 Sep 2026. First seen 8 Sep 2026. Catalogues list a 1,048,576 tokens context window. 12 evidence links.

Facts as of

Context window
1,048,576
Max output
131,072
Input
image · text · video
Output
text

Alex's take

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Evidence links 12

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