surely steve yegge will not let this go unanswered
We're primarily focusing on VSCode, IntelliJ and Neovim for Cody. Of course I'll be working on an Emacs version, but that's kinda best-effort for now.
As for the new crop of codegen models, they seem to be getting to parity with GPT/Claude/Bard-class models for code autocompletions, but not so much for other tasks.
We're working on incorporating OSS models, but I'd be surprised if they're ready for prime-time this year. I think next year they'll be huge.
Just my $0.02, take with a grain of salt. Shit moves fast.