DeepSeek V4-Pro locks in 75% permanent API discount: $0.435/M tokens, 20x cheaper than GPT-5.5
On May 22, 2026, DeepSeek made its 75% API discount permanent for V4-Pro. Coding and reasoning tasks now cost $60 for 200M tokens instead of $240+. Here's what changed, who wins, and whether cheap frontier models shift the competitive map.