GPT-5.4 vs Mercury 2.5

GPT-5.4 against Mercury 2.5
GPT-5.4Mercury 2.5
Coding index64.41.6
Benchmarks behind it Verified, 3 benchmarks Partial, 2 benchmarks
Output $/Mtok$15.00$0.15
Cost per solved task$1.02Not computable
Context window1.05M260K