That’s assuming that confidence intervals are even independently comparable. Anecdotally major OCR services with specific languages have average confidence intervals that are wildly divergent from similar services with different languages for the same relative quality of result. Acting as if confidence interval is in any way absolute or otherwise able to reliably and consistently indicate the relative quality of results is a mischaracterization at best. In the worst case CI is as good as an RNG. The value of the CI is in the ability to tune usage of the results based on observations of the users and characteristics of the request, sometimes it is meaningful but not always. In this case “good” code essentially hardcodes handling for all the idiosyncrasies of the common usage and the OCR service.