Top Thrill Dragster is a steel accelerator roller coaster built by Intamin at Cedar Point in Sandusky, Ohio, United States. It was the sixteenth roller coaster built at the park since the Blue Streak in 1964. When built in 2003, it was the first full circuit roller coaster to exceed 400 feet (120 m) in height, and was the tallest roller coaster in the world, before being surpassed by Kingda Ka at Six Flags Great Adventure in May 2005. Top Thrill Dragster, along with Kingda Ka, are the only strata coasters in existence. It was the second hydraulically launched roller coaster built by Intamin, following Xcelerator at Knott's Berry Farm. The tagline for Top Thrill Dragster is ''Race for the Sky''.

Can we conclude that is the top thrill dragster the tallest roller coaster?
no