The Welshman praised his players for their escape from the bottom three, saying: "All the credit is at their door, I have to say".
The curtain has come down on another Premier League season.
"The important thing is in the games we tried, we tried, we tried", Guardiola added.More news: Tottenham Concludes Season In Stunning Fashion Against Leicester City
Gabriel Jesus struck with virtually the last kick at St Mary's to take City to the century mark in suitably dramatic fashion. City have set competition records for wins, goals scored and points acquired during their march to glory in 2017-18.
Guardiola struggled to grasp the feat whereas describing the late drama as a becoming finale to a unprecedented marketing campaign.
Gabriel Jesus" 94th-minute goal earned a 1-0 win at Southampton and boss Guardiola said: "One hundred points, still I can not believe it.
"We had the challenge to break records".More news: Woman slams into back of truck on Bangerter Highway
"100 points is a lot; 50 points at home, 50 points away so it means how stable, how good we were all the season".
City finished 19 points clear of second placed Manchester United - the biggest title-winning margin in the Premier League era - to emphasis the gap between the runaway champions and the chasing pack.
Despite penning an initial six-year deal when he moved to England, City have seen fit to tie their number one down to renewed terms that run until 2025.
Chelsea have once again been surpassed - they scored 103 goals as they won the league in 2009-10.More news: Pakistan bars United States diplomat from leaving amid tense relations
Angel Rangel and Leon Britten both said their farewells after distinguished careers for Swansea and there was more emotion at Huddersfield where Arsenal manager Wenger signed off after overseeing his 1,235th game.