DeepSeek 4.1 Flash: The Silent Disruptor

🔥 What happened A developer has been using DeepSeek 4.1 Flash heavily for a month and can't tell it apart from Opus – except on price. KV cache shrank 437x, keeping all-day coding sessions under $1. 💡 Why it matters Chinese models now trail the frontier by only 1–2 months but cost 100–1000x less. At $10/month for unlimited use, even trivial tasks become economical – this changes how engineers work. ⚡ Our take The frontier labs are asleep at the wheel. Anyone still paying top dollar is subsidizing their margins, not their own productivity.