The Socceroos equalled their worst defeat to the Selecao, losing 6-0, and the German coach concedes his side have a long way to go before reaching Luiz Felipe Scolari's men's level
The Socceroos were pummelled by Luiz Felipe Scolari's men 6-0 in a friendly at the Estadion Nacional Mane Garrincha in Brasilia on Saturday.
"We have come to Brazil to get an idea how football on this level is, and now we know and now it's up to us to analyse and to work on all the elements we have to improve on," Osieck said following the huge defeat.
"When you don't play the ball accurate from defence and you give away [possession] easily and the other team, like Brazil, they press and that is what we have to work on and to learn to play the ball under high pressure."
A double from Jo and a Neymar strike had the hosts three up before half-time, with further goals coming from Ramires, Alexandre Pato and Luiz Gustavo.
It equals the Aussies' worst ever result against the Selecao following their 6-0 Confederations Cup drubbing in 1997 when Romario and Ronaldo grabbed hat-tricks.
"We haven't played a team like Brazil for a long time," Osieck added.
"Brazil brings a different quality to the game, they started with a lot of pace, we were pushed back and when we could win the ball we gave it away too easily.
"We played very inaccurate balls up front and that is how we conceded the goals [in the] first half, we lost the balls in the attacking third and against a team like Brazil you get punished for it.
"I must say the quality of the Brazilian team and of the individual players is fantastic."
Australia now turn their attention to France, whom they play against in a friendly in Paris in October.