Ailyre

Model release · Meta

Muse Spark 1.3

Model released

Long-horizon agent + coding; vs 1.2 about 20% fewer tool calls, 25% fewer tokens; max reasoning still in safety testing; Standard $1.25/$4.25 /1M (cached in $0.15); Contributor $0.10/$0.20

Availability

Meta Model API muse-spark-1.3 (Standard); muse-spark-1.3-contributor; base https://api.meta.ai/v1; consumer Muse personal Agent open in US (iOS/Android/muse.ai, 2026-09-08)

Source trace

Reviewed by Ailyre. Source evidence is presented separately from our summary.

ai.developer.meta.com

ai.developer.meta.com

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