DeepSeek V4 Flash 0731 vs GPT-5.5

DeepSeek V4 Flash 0731 against GPT-5.5
DeepSeek V4 Flash 0731GPT-5.5
Coding index51.871.3
Benchmarks behind it Verified, 4 benchmarks Verified, 5 benchmarks
Output $/Mtok$0.396$30.00
Cost per solved task$0.01$1.65
Context window1.05M1.05M