I feel like whoever wrote this doesn't use these models regularly. Deepseek v4.1 Flash is far from the pareto line. You can get the same performance for half the cost from Luna or Haiku 5.5 now, or you can get substantially improved performance at the same price with Sol 6.1 ~medium.
It did correctly make waves when it launched, but was quickly eclipsed by the deluge of american model releases, especially those competing on cost.