GPT-5.4 vs Muse Spark 1.3

GPT-5.4 against Muse Spark 1.3
GPT-5.4Muse Spark 1.3
Coding index64.457.4
Benchmarks behind it Verified, 3 benchmarks Verified, 4 benchmarks
Output $/Mtok$15.00$4.25
Cost per solved task$1.02Not computable
Context window1.05M1.05M