The value pick, and the reason is money. Its reasoning sits close to the frontier on maths and code, the web app is free to use, and the API costs a small fraction of what the big US labs charge, which is why a growing number of other products quietly run on it underneath.
The models are open-weight, so a team that wants full control can host them on its own hardware. The caveat is plain: it is a Chinese service, so read the data terms and keep genuinely sensitive material off the hosted version. For everything else, the price-to-quality ratio is hard to beat.