Around mid-October deepseek-v4.1-flash suddenly started feeling much dumber in my coding agent, so I parsed my local session logs to see when it broke. Before the update it had a funny quirk where it would randomly reply in Chinese while being 100% convinced it was speaking English. In the -1017 update (released Oct 17) they fixed the Chinese leak and made it fire tool calls more aggressively - and somehow lobotomized the model in the process. My provider(opencode) silently overwrote the deepseek-v4.1-flash endpoint with the new weights by Oct 19. My swearing rate tripled, I ended up switching models mid-session 6.7x more often, and because it's a cloud API, there's no way to roll back to the old weights.   submitted by   /u/Jipok_ [link]   [comments]