I dont think thats bots can solve the capthcas. its impossible
There is bots which can solve simple captchas such as recaptcha's captcha. Solvemedia, Minteye and areyouahuman captchas are even better. But there are bots which takes specific captchas from websites and will give to paid captcha solvers(humams).
P.S. If you want to look for yourself, go to browser extension/plugin store, search for captcha solver and install it and open a faucet which has recaptcha. Solvemedia may not work.
-MZ
AFAIK, no automated bot can solve recaptcha at all. If bots are detected, they will just increase the difficulty. Even if OCRs are created, the accuracy will be very low. Most of them are just human captcha solving services. Solvemedia involves the user to click on the screen which can be abit complicated.