My testing has been very limited, so I don't want to opine too much. If anyone has a differing opinion based on more testing, please share, I'm interested!
So I've been using Deepseek for 3 months with Aider coding assistant. Look up the "Aider LLM leaderboard" for proper test results if you like, in my experience the Deepseek V3 is just as good as Claude at less than 1/10th the price. I can't speak about o1 it is just too expensive to be worth it
OpenAI is going to be beaten on price, wait and see.
edit: Fair enough. I'm fishing for opinions too.