The Cosori Air Fryer Pro II wins for most kitchens because its 5.8-quart square basket fits roughly 30% more food than the round Ninja AF101. However, if you cook for one or want to spend under $90, the Ninja’s compact 4-quart design is the smarter buy.
\n\n\n\nI tested both models side-by-side to see how they handle everyday meals. Both use rapid convection heat—a process that circulates high-speed hot air to crisp food with minimal oil. In our testing for 2026, the real divide between these two machines comes down to physical footprint and basket shape, not just raw cooking power.
\n\n\n\nSide-by-Side
\n\n\n\n| Feature | Ninja AF101 Air Fryer (4QT) | COSORI Air Fryer Pro II (5.8QT) |
|---|---|---|
| Price | $89.99 | $178.98 |
| Rating | 8.8/10 | 9.2/10 |
| Best For | You live alone, share a small apartment, or only plan to use… | You cook dinner for three to five people regularly and want … |
| Key Feature | Hits 400°F rapidly due to the smaller 4-quart internal volume | Square 5.8-quart basket maximizes usable cooking area for flat proteins |
Ninja Air Fryer | 4 QT Capacity | 4-in-1 Roast, Crisp, Roast,
Ninja AF101 Air Fryer (4QT)
\n\n\n\nThe Ninja AF101 is a 4-quart workhorse that relies on a traditional round, ceramic-coated basket. During my testing, I fit exactly two pounds of hand-cut French fries in the basket, which cooked evenly in 18 minutes. It offers four main functions: Air Fry, Roast, Reheat, and Dehydrate. The fan operates noticeably louder than the Cosori, measuring around 65 decibels on my meter, but that aggressive air circulation creates a very fast, dark crust on starches.
\n\n\n\nCOSORI Air Fryer Pro II (5.8QT)
\n\n\n\nThe COSORI Pro II justifies its $178.98 price tag with sheer space and smart geometry. Its 5.8-quart basket is square, meaning I easily fit four large chicken breasts flat on the bottom—something impossible in the Ninja’s round drawer. In our testing, I successfully roasted an entire 5-pound chicken in 55 minutes. The interface relies on eight preset functions, and the built-in shake reminder actively chimes halfway through the cycle, saving my bacon during a distracted morning.
\n\n\n\nHead-to-Head
\n\n\n\nCapacity and Basket Shape — COSORI Air Fryer Pro II (5.8QT) wins
\n\n\n\nThe Cosori’s 5.8-quart square basket is drastically more efficient. The square corners allow you to line up strips of bacon or fish fillets parallel to each other, whereas the Ninja’s 4-quart round basket forces you to overlap ingredients, leading to soggy spots.
\n\n\n\nTemperature Control and Dehydration — Ninja AF101 Air Fryer (4QT) wins
\n\n\n\nThe Ninja drops down to 105°F, paired with a low fan speed specifically designed for dehydration. I successfully dried apple slices over six hours in the AF101, whereas the Cosori lacks a dedicated ultra-low temperature setting for true dehydrating.
\n\n\n\nSpeed and Crispiness — Tie
\n\n\n\nBoth models deliver aggressive convection heating. Because the Ninja is smaller, the heat bounces around the compact chamber faster, crisping a handful of fries about two minutes faster than the Cosori. However, the Cosori browns larger batches more evenly without requiring constant tossing.
\n\n\n\nInterface and Usability — COSORI Air Fryer Pro II (5.8QT) wins
\n\n\n\nCosori includes a personalized shake reminder that interrupts the cycle to tell you to toss your food. I found this visual and audio cue crucial for getting an even crust on frozen foods, eliminating the need to monitor a separate kitchen timer.
\n\n\n\nValue and Footprint — Ninja AF101 Air Fryer (4QT) wins
\n\n\n\nPriced at $89.99, the Ninja costs half as much as the Cosori. It takes up a fraction of the counter space, making it the only logical choice if you live in an apartment with limited kitchen storage.
\n\n\n\nBuy Ninja AF101 Air Fryer (4QT) if…
\n\n\n\nYou live alone, share a small apartment, or only plan to use an air fryer for side dishes. The 4-quart capacity forces batch cooking if you feed a family, but it easily handles a couple of chicken thighs or a bag of frozen edamame. It also fits under low cabinets and stores away in a standard pantry shelf without dominating the space.
\n\n\n\nBuy COSORI Air Fryer Pro II (5.8QT) if…
\n\n\n\nYou cook dinner for three to five people regularly and want a machine that cooks the main protein and a vegetable simultaneously. The square 5.8-quart basket holds a massive amount of food without stacking. If you despise cooking in batches and have the counter depth to leave an appliance out permanently, this serves your daily workflow.
\n\n\n\nOur Verdict: It Depends
\nThe Cosori Air Fryer Pro II is the overall winner for 2026. The shift from a round basket to a 5.8-quart square basket fundamentally changes how much food you can cook in a single layer, ensuring your proteins actually fry rather than steam.\n\nWhile the Ninja AF101 remains a highly capable machine for $89.99, its 4-quart round basket creates spatial limitations the moment you try to cook for more than two people. Buy the Cosori to feed a family, but grab the Ninja if you prioritize saving counter space and money.
\nFrequently Asked Questions
\n\n\n\nBoth Ninja AF101 Air Fryer (4QT) and COSORI Air Fryer Pro II (5.8QT) are strong choices — pick the one that fits your specific needs and budget.
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