According to Sam Altman, the GDPval benchmark measures how often industry experts prefer the output of an AI model compared to outputs from other experts. GPT-5.2 achieved a 70% preference rate, significantly higher than GPT-5's 38%. This advancement demonstrates the model's superior performance in generating slides, spreadsheets, code, and other business-critical content, suggesting increased business value and reliability for enterprise AI deployments (source: Sam Altman on Twitter, Dec 11, 2025).