What LLM does Phoenix.new use?

claude 4 sonnet as the main driver atm, and a mix of smaller models depending on the scenario

	▲	tptacek 2 days ago \| parent [-]
		I'm building an agent right now (or rather, extending an agent I build a few weeks ago in a couple hours) and I would love to hear more about which scenarios get assigned to which models. (I almost just asked you on company Slack but figured the answer would be more broadly interesting.)

Based on the blog post, Phoenix.new uses Claude 3 Opus as its underlying model, which explains its strong performance with Elixir/Phoenix codebases.