Muse Spark 1.3

Muse Spark 1.3 was released on 2 September 2026 through Muse Code and the Meta Model API, keeping the 1M-token context and $1.25 per million input / $4.25 output pricing of 1.2. The notable addition is a Contributor tier at $0.10 input / $0.20 output (cached input $0.002) — roughly 12× cheaper on input and 21× on output — on terms under which, as Crypto Briefing summarises, "your prompts, responses, and usage patterns get fed back into Meta's training pipeline". For any buyer the two tiers are two different products: the discount is paid for with the data. No independently reported benchmark scores were located; none are recorded.