Muse Spark 1.1 nears GPT-5.6 Sol on HealthBench Pro at lower cost

On HealthBench Pro, Muse Spark 1.1 achieves performance similar to GPT-5.6 Sol, possibly slightly better, at a fraction of the cost. A quoted benchmark report puts Muse Spark 1.1 at $1.25/$4.25 per M tokens in/out versus $5/$30 for GPT-5.6 Sol, and says it is statistically on par on the length-adjusted score.