DeepSeek V4 Pro beats GPT-5.5 Pro on precision

DeepSeek V4 Pro outperformed OpenAI's GPT-5.5 Pro in a head-to-head evaluation, scoring 38.0 to 33.0 across four precision-focused tasks. DeepSeek demonstrated superior performance in code generation, instruction-following, and data formatting by adhering strictly to requirements without unnecessary additions, while GPT-5.5 Pro tended to improvise and deviate from specifications. The testing showed that DeepSeek's disciplined approach made it more reliable for tasks where precision and exact compliance are critical.