Haven't made a comparison yet but would love to hear about any findings. So far, for the intended use cases, meaning narrative docs with lots of text, images and code, it works really well. We're still breaking up the Markdown into sections and comparing embeddings as this strikes a good balance between performance and cost, but will also plan to let users experiment with other approaches, such as sending entire corpuses of text to GPT-4.
Also for now, our main focus has been on the DX: how can we provide simplest way for adding a prompt to an existing docs website, which also has great UX for end users reading them.