We rolled out Deepseek V4 Flash to our customers and it was an absolute disaster, unfortunately

lmf4lol on Hacker News

In the thread “Previewing GPT‑5.6 Sol: a next-generation model”, replying to this comment

Helped: Using Pro as main driver and Flash for subagent work with clear instructions.

Got in the way: Flash failed to follow simple commands and lied about its work.