It used to be baked into Google search, but they seem to have mostly fixed it sometime in the last year. It used to be that "black couple" would return pictures of black couples, but "white couple" would return largely pictures of mixed-race couples. Today "white couple" actually returns pictures of mostly white couples.
This one was glaringly obvious, but who knows what other biases Google still have built into search and their LLMs.
Apparently with DeepSeek there's a big difference between the behavior of the model itself if you can host and run it for yourself, and their free web version which seems to have censorship of things like Tiananmen and Pooh applied to the outputs.
This was all done with a lazy prompt modifying kluge and was never baked into any of the models.