Meta releases Muse Spark 1.3 for coding and agent workflows, with max reasoning still in safety testing

Meta on Wednesday released Muse Spark 1.3, an update it says improves agentic and coding performance, and began rolling the model out in Muse Code and the Meta Model API while holding back a max-reasoning mode for additional safety testing. Meta Superintelligence Labs framed the release as a more practical step toward personal superintelligence, drawing on months of use of Muse Code and the API.