GPT-5.2 vs Mercury 2.5

GPT-5.2 against Mercury 2.5
GPT-5.2Mercury 2.5
Coding index55.91.6
Benchmarks behind it Verified, 3 benchmarks Partial, 2 benchmarks
Output $/Mtok$14.00$0.15
Cost per solved task$1.91Not computable
Context window400K260K