Muse Spark 1.3
by Meta · ID muse-spark-1-3 · Released 2026-09 · Proprietary
1493
ELO Score
-
MMLU
-
HumanEval
1M
Context Window
$1.25
Input Price
About Muse Spark 1.3
Meta's reasoning model, released early September 2026 and delivered through Muse Code and the Meta Model API. A 1M-token context with text, image, and video input; it lands around #6 on the Artificial Analysis Intelligence Index. The standard endpoint is $1.25 input / $4.25 output per million (cached input $0.15); a contributor tier runs $0.10 / $0.20 if Meta may train on your prompts, and a higher 'max reasoning' tier is in limited preview. Prices checked 3 September 2026. Arena text score 1493 (muse-spark-1.3-max, 4,723 votes, still preliminary), leaderboard of 13 September 2026.
Not sure where to find it? Search query: "Muse Spark 1.3 official"