I'm currently using DeepSeek v4 Flash (running on my Sparks) to customize the DeepSeek harness.
It's impressive how well it's doing, feels to be about at the level of GPT-5.4 or Opus 4.5.
But comparing it to using GPT-5.6 Sol to customize Pi it's not even close...
@davis7 I was trying deepseek for the past few weeks, and from gemini... I must say it feels SOOO much nicer, there is still a huge hallucination problem with gemini. But the frontier models are wayyy further than both of these imo!