My startup is working on this fundamental problem.
You can try out our early product here: https://cleanlab.ai/tlm/
(free to try, we'd love to hear your feedback)
Tested the free chat. The chat bot gave slightly incorrect answer, and trustworthiness gave it score of 0.749 and said the answer is completely incorrect, which was not actually the case. Seems more confusing with two answers that are somewhat wrong.