DeepSeek V4 Pro vs Flash: 3 Tasks, 100M Tokens, Real Cost-Quality Tradeoff

This analysis compares DeepSeek V4 Pro and V4 Flash models, noting a 12x price difference but a minimal quality gap for simple coding tasks, making Flash a viable option. For complex multi-file reasoning, V4 Pro is essential, and implementing task-based routing can reduce DeepSeek expenses by 80% without significant quality loss.