The Sky Sports pundit has been left unimpressed by some of the teams attempting to wrench the title from Manchester City's grasp and thinks that some of the leading contenders have lacked quality this season.
Speaking on the Stick to Football podcast, Keane said: "I think the standard hasn't been great during the last month or two of the Premier League.
"Some of the goals we've been watching (conceded) have been so poor - the lack of quality."
The former Manchester United midfielder considers City to be ahead of the rest and "can't see beyond" Pep Guardiola's team winning a fourth straight title.
Keane said: "Man City are excellent - there's no doubt about it - but other teams need to sort themselves out. I still can't see beyond City, I really can't.
"Even if they have some sort of blip, they're strong enough."
Keane's fellow pundit Gary Neville thinks that Arsenal can threaten City's supremacy but doubts that Liverpool can claim the crown.
The former Red Devils full-back said: "I think that Arsenal can win the league this season.
"Starting like this, the football will come, the football that we saw from them last season will come. The fact that they've started a little bit slower, I never think is a bad thing, they're sat there in the pack behind (top). I don't think Liverpool are (capable)."