Yes, Cody can use Ollama for both chat and autocomplete. See https://sourcegraph.com/docs/cody/clients/install-vscode#sup.... This lets you use Cody fully offline, but it doesn't /prevent/ API calls to third parties; you are still able to select online models like Claude 3.5 Sonnet.

I have a WIP PR right now (like literally coding on it right now) making Cody support strict offline mode better (i.e., not even showing online models if you choose to be offline): https://github.com/sourcegraph/cody/pull/5221.