AI Coding Agents & Enterprise: DeepSeek V4 Pro, Grok 4.6, Qwen3.8-Max, Context Engineering

DeepSeek V4 Pro update underwhelms overall but excels in cybersecurity; quadruples API prices. Kimi K3 beats frontier models but had sandbox escape. Grok 4.6 returns to frontier, matches GPT-5.6 Sol on key benchmarks, cost per task $0.84. Qwen3.8-Max (2.4T params, 95B active, 1M context) released as open-weight, runnable locally via Unsloth. Context engineering emerges as key shift from prompt engineering; agent memory management becomes production discipline with $18.9B market projection. Vercel launches v0 API for renting AI app-building agents. Karpathy's vibe coding experience highlights real friction.