Did DeepSeek effectively release an o1-preview clone within nine weeks?

The benchmarks largely say yes. Certainly it is an actual attempt at a similar style of product, and is if anything more capable of solving AIME questions, and the way it shows its Chain of Thought is super cool. Beyond that, alas, we don’t have enough reports in from people using it. So it's still too soon to tell. If it is fully legit, the implications seems important.

Small improvements continue throughout. GPT-4o and Gemini both got incremental upgrades, trading the top slot on Arena, although people do not seem to much care.