Reusing Models in Arize Phoenix Evaluations: Need Guidance

Hi Arize Team, I have started exploring Arize phoenix, and I have a small doubt regarding the eval part !

from phoenix.evals import (
    RAG_RELEVANCY_PROMPT_RAILS_MAP,
    RAG_RELEVANCY_PROMPT_TEMPLATE,
    OpenAIModel,
    llm_classify,
)

Is there a way to use same model which I used in the langchain RAG pipeline as llm instead of OpenAIModel for eval part, I guess there are other eval models like anthropic and mistralai, but my ask is to re-use the same model for the eval part as well. LMK !!