GPT-5.1 vs GPT-5.6 Luna

GPT-5.1 against GPT-5.6 Luna
GPT-5.1GPT-5.6 Luna
Coding index40.458.0
Benchmarks behind it Verified, 3 benchmarks Verified, 6 benchmarks
Output $/Mtok$10.00$1.20
Cost per solved task$1.02$0.04
Context window400K1.05M