Meta Muse Spark 1.3 Just Rolled Out — What Actually Changed, and the Catch With the Cheaper Tier (September 2026)
Quick answer: Meta shipped Muse Spark 1.3 on September 2, 2026, and it’s an efficiency update, not a bigger brain. Same context window, same output ceiling, same standard pricing as 1.2. What actually changed is that it uses about 20% fewer tool calls and 25% fewer tokens to finish the same agentic task, according to…
