it can definitely evaluate whether an LLM is better aligned than itself (for some narrow definition of "aligned") - this is the motivating principle behind Anth

it can definitely evaluate whether an LLM is better aligned than itself (for some narrow definition of "aligned") - this is the motivating principle behind Anthropic's Constitutional AI idea. "Better" is pretty vague, but "more capable" would be difficult, because I don't think ChatGPT has a good idea of its own capabilities.