Four Chinese Open-Weights Coding Models Dropped in 12 Days. DeepSeek V4 Costs $0.14 per Million Tokens. Claude Opus Costs $15. Here's the Stack Decision You Actually Need to Make.
GLM-5.1, MiniMax M2.7, Kimi K2.6, and DeepSeek V4 landed in a 12-day window with benchmark scores matching Claude Opus 4.6 at 5–25x lower cost. GLM-5.1 ships under MIT. Here's when to switch and when not to.