Meta's pattern of rapid Arena integration for Muse Spark releases drives trader sentiment on whether version 1.4 or higher will debut in Text Arena. Muse Spark 1.3 launched September 2, 2026, and was added the same day to Code Arena variants including Text, alongside agentic and coding benchmarks. Prior versions followed similar quick rollouts after their respective launches, reflecting Meta's emphasis on community-driven evaluations for visibility amid competition with models like Claude and Gemini. The company's roadmap highlights bigger models and an open-weights release without dates, while a codenamed successor remains in early development. Key swing factors include Meta's release cadence, any pre-announcement Arena testing, and alignment with agentic strengths that suit Text Arena tasks.