Comment by femto

"Independent" is more important than "opposite". I don't know that promptfoo would be overtly biased. Granted they might have unconscious bias or sensitivities about offending paying customers. I do note that they present all their evidence with methods and an invitation for others to replicate or extend their results, which would go someway towards countering bias. I wouldn't trust the neutrality of someone under the influence of the CCP over promptfoo.