GPT-5.3-Codex vs Mercury 2.5

GPT-5.3-Codex against Mercury 2.5
GPT-5.3-CodexMercury 2.5
Coding index60.01.6
Benchmarks behind it Verified, 3 benchmarks Partial, 2 benchmarks
Output $/Mtok$14.00$0.15
Cost per solved task$0.59Not computable
Context window400K260K