Which engine does what

GROX thinks with one brain — GROX’s own engine unless you pick another in Settings → Brain. The brain’s strongest model does builds, documents and hard thinking; a quicker one answers everyday chat, and Auto picks by how hard the question is. Pictures, video, live voice and live web search always run on GROX’s own engines. See which engines did your work, by number of calls, in Analytics → Cost & Routing.