No, you cannot get the Chase Sapphire Reserve 100k bonus anymore, as it was a limited-time promotion that ran from August 2016 through March 2017. Cardholders who were approved during that period and spent $4,000 within 3 months of account opening got 100,000 bonus points. That Chase Sapphire Reserve 100k bonus was worth $1,500 in travel – an incredible deal.
But after March 2017, you get a bonus of 50,000 bonus points for spending $4,000 in the first 3 months. That's still one of the biggest credit card bonuses on the market, though. It's also enough to help offset Chase Sapphire Reserve's $550 annual fee.
More info about Chase Sapphire Reserve's 100k bonus:
So, at the end of the day, the Chase Sapphire Reserve's 100k bonus is no longer available because it was never supposed to be permanent. It was the equivalent of 35% cash back, and that's just not sustainable. Chase offered it to build some buzz for the new Chase Sapphire Reserve Card when it was introduced. Since that seems to have worked, they retired that promotion. It's possible Chase could do another 100,000 point bonus in the future. But don't count on it.
More info about what you get with Chase Sapphire Reserve:
Fortunately, Chase Sapphire Reserve's sign-up bonus isn't the only benefit you'll enjoy. You'll also receive a $300 travel credit each year. Plus, you'll earn a total of 10 points per $1 spent on hotels and car rentals booked through Chase, a total of 10 points per $1 spent on prepaid restaurant reservations or takeout orders made through Chase, a total of 5 points per $1 spent on flights purchased through Chase, 3 points per $1 spent on all other travel and dining purchases, and 1 point per $1 on all other purchases. Those points are normally worth 1 cent each, but when redeemed for travel, they're worth 1.5 cents apiece.