Muse Spark 1.3 Released
Meta MPK 15, 1, Hacker Way, 1 Hacker Way, Belle Haven, Menlo Park, San Mateo County, California, 94025, United States
Meta
CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins88% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or betterMeta's[1][2] post is dated "September 2, 2026" and says "We're excited to release Muse Spark 1.3" and that it "is available today in Muse Code and in Meta Model API"; Artificial Analysis[4]' write-up of the same day opens "Meta has released Muse Spark 1.3".
Meta releases Muse Spark 1.3, its fourth Muse Spark model in five months, trained for long agentic and coding work and still priced at $1.25 per million input tokens; Artificial Analysis ranks its top variant behind only Anthropic's Claude Fable 5.1 and Opus 5.
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