Perez was left fighting for his future in F1 after being told he was surplus to requirements one year on from his signing as replacement for Lewis Hamilton.
Despite McLaren on course to complete only their third full season without a podium - with their last in 1980 - after building a slow car, Perez has been dumped in favour of development driver Kevin Magnussen.
There are options available for the 23-year-old Mexican, such as the hotly-contested vacancy at Lotus, the two seats with Force India, or even a return to Sauber.
"My future is definitely looking better than it was seven days ago, so we have some progress in that respect, which is positive," said Perez.
"But as we all know in Formula One, if you don't have a contract then there is nothing there, although I'm confident I will get a good seat that will keep me very motivated to achieve my dreams."
Asked by Press Association Sport about his chances of being in F1 in 2014, Perez replied: "Very high, I would say 95 per cent.
"But in Formula One to have the other five per cent is quite a lot. I might be here, I might not, but I'm pretty confident I will be here."
At this stage the front-running prospect is to head back to Sauber, a team that last season provided him with his highs so far of three podium finishes, including twice as runner-up.
Although opting to leave the Swiss-based marque for McLaren, Perez maintains he did not burn any bridges in doing so.
"There are some options, and one of them is going back to Sauber, but there are also other options we are looking at," said Perez.
"Force India can be one, but we are not really deep in discussion. We are still a bit far away.
"But a few teams have not announced their drivers, so we are looking and seeing which will be the best option for my future.
"With Sauber, there are no issues between us, not at all. I always try and leave my teams on the best possible terms, as I am leaving McLaren.
"Life is very long and you never know where you're going to end up, so you have to try to be professional and a good person."
For a driver like Perez, the choice is a lottery given the change in engine regulations as no driver knows which provider will be the key player.
Lotus, Sauber and Force India will be powered by Renault, Ferrari and Mercedes respectively, so he faces a dilemma should he have options.
Despite that, Perez said: "The engine is important, but it's more to do with the team, how they are doing financially, how much the car is prepared for next year, so many aspects.
"The team might have done a great job this year, but you never know how they will do next year, so it's very important we look at all the factors."