GPT-5.4 Mini vs Mercury 2.5

GPT-5.4 Mini against Mercury 2.5
GPT-5.4 MiniMercury 2.5
Coding index35.81.6
Benchmarks behind it Verified, 5 benchmarks Partial, 2 benchmarks
Output $/Mtok$4.50$0.15
Cost per solved task$0.70Not computable
Context window400K260K