The former Liverpool defender believe Premier League teams are getting ever closer to matching the 2003/04 achievement by the Gunners
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Arsenal famously won the 2003/4 English league title without losing a game all season - the only time the feat has been achieved in the Premier League era.
That season, a formidable Arsenal team led by Arsene Wenger went on to record the longest unbeaten run in English top-flight history, extending their sequence into the following season before it was ended by Manchester United at an astonishing 49 games.
Spanning over a decade to modern football, there have been no English team to match Arsenal's unbeating record.
Premier League leaders Liverpool had a chance to do so this season, but fell short in a shock defeat to Watford in February.
Jurgen Klopp's Liverpool side had won every league game, had only one draw away to Manchester United back in October before Watford ended their unbeaten run five games of Arsenal's record.
Speaking in a football show with Sky Sports, Carragher described Arsene Wenger's Invincibles as one of the best teams he played against - but warned that the Londoners could soon have to share their prestigious record with other English sides.
"Well, I have always said that was the best team I have played against."
And not necessarily just that season. There was a two or three year period from 2002-2004 and I think in 2003 Man United won the league, but if I'm being honest, I still felt Arsenal were the team in that year. I think they threw it away in that season.
"It wasn't just because they were so good technically, they were so big, powerful, quick, strong. You always went on to the pitch wondering which area of the game you are better in.
"And normally if the team is really good technically, you can outfight them, outmuscle them. But with that Arsenal team, it was such a powerful team as well as pace-wise.
"The unbeaten achievement - you are always going to lose games in a Premier League season.
"You can get so close like Liverpool did this season and the Watford thing happened.
"I do feel like the last couple of years, teams are getting closer."