Pella is generally considered a premium, high-end brand, though not quite at the ultra-luxury tier occupied by names like Marvin’s top lines, Andersen’s premium series, or specialty makers like Kolbe.
Pella sits in the upper-mid to high-end range, known for solid craftsmanship, strong energy efficiency, extensive customization options, and a wide product lineup spanning multiple price points and quality tiers, including their Impervia, Architect, and Reserve series (Reserve being their top-of-line, most premium offering with wood interiors and higher-end hardware).
So the honest answer: Pella is respected and priced as a high-end brand overall, especially their upper series, but “high-end” can mean different things depending on which specific product line you’re comparing and against which competitors.