There's a reactor on youtube that called Dick the 2nd best detective in the world and someone commented this :

"LOL sorry but Dick Grayson isn't the '2nd Greatest Detective in the World', maybe top 5. You can maybe call him the 2nd Greatest Detective out of the Robins...Bruce Wayne is number 1 and Detective Chimp is number 2 and then Tim Drake and I might even put Barry Allen as number 4 above Dick because hell, the guy is a professional 'detective' since he works at a crime lab."

I just needed a second after that cause Barry is a better detective than Dick cause he's a "professional" detective in his daily life... cause the guy who's a former cop is not apparently LOL

Also, wtf is Chimp ??

Dick's canonically confirmed to be second best to Bruce in detective skills. I can't say whether he or Bruce are better than Bobo (Detective Chimp) because I'm not that familiar with Bobo. Although, Dick called Bobo the world's greatest detective recently in Titans: Beast World #3.