According to God of Prompt on Twitter, Anthropic's recent tests with Claude Sonnet 4 found that giving the AI model more reasoning time can actually degrade its performance, rather than improve it as previously assumed (source: @godofprompt, Jan 8, 2026). This challenges a widely held belief in the AI industry that extended reflection or step-by-step thinking leads to better output quality. The findings highlight the importance of optimizing AI models for effective, concise reasoning rather than simply increasing computation or context, which could have major implications for AI application design, especially in business-critical areas like customer service, financial analysis, and legal automation.