Muse Spark 1.3 was released by Meta on September 2, 2026, as a flagship model in the Muse Spark line.
Five points up on the all-round intelligence index over Muse Spark 1.2 and higher scores on office and terminal tasks, at the same price and the same 1M-token context.
Compared with Muse Spark 1.2 · the model it replaces
Scores 5 points higher on the all-round intelligence index
Artificial Analysis Intelligence Index v4.3.2 — one score averaging 10 hard tests
45
▲ xhigh setting · up from 40 · +5 points
Does better on realistic office work
GDPval-AA v2 — real knowledge-work tasks, scored as an Elo rating
1709
▲ up from 1615 · +94 Elo
Same price as Muse Spark 1.2
Price per 1M tokens — what developers pay, input / output
$1.25 / $4.25
unchanged from Muse Spark 1.2
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Muse Spark 1.3 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Latest: Muse Spark 1.3 · Sep 2, 2026
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