# Muse Spark 1.3

Meta



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 \(iOS/Android/muse.ai, 2026-09-08\)
- Model released: Sep 02, 2026 · Date only

## Sources

- Source: https://ai.developer.meta.com/docs/models/

Canonical entry: https://www.ailyre.com/source/?id=meta-muse-spark-1-3&lang=en