GPT-5.2 vs Muse Spark 1.3

GPT-5.2 against Muse Spark 1.3
GPT-5.2Muse Spark 1.3
Coding index55.957.4
Benchmarks behind it Verified, 3 benchmarks Verified, 4 benchmarks
Output $/Mtok$14.00$4.25
Cost per solved task$1.91Not computable
Context window400K1.05M