Meta's Muse Spark line has followed a rapid cadence since the initial April 2026 launch, with version 1.1 in July, 1.2 in early August, and 1.3 on September 2 delivering gains in long-horizon coding, tool use, and agentic efficiency through targeted training on engineering workflows. Trader sentiment for a 1.4+ release by late October reflects this momentum alongside Meta Superintelligence Labs' broader roadmap for larger models and eventual open weights, yet recent focus has shifted toward the newer Muse Wonder variant and API pricing tiers without any official 1.4 announcements or benchmarks. Key swing factors include Meta's compute allocation priorities, competitive pressure from frontier coding agents, and whether the next update meets public availability criteria before month-end.