GPT-5.4 Nano vs Muse Spark 1.2

GPT-5.4 Nano against Muse Spark 1.2
GPT-5.4 NanoMuse Spark 1.2
Coding index44.855.7
Benchmarks behind it Partial, 2 benchmarks Verified, 5 benchmarks
Output $/Mtok$1.25$4.25
Cost per solved task$0.14$0.64
Context window400K1.05M