Main Difference: The Ninja IG651 includes a Smart Cook System with a built-in Foodi Smart Thermometer for hands-free precision cooking, while the Ninja IG601 offers the same grilling and griddling performance without the thermometer.
If you are searching for a premium indoor grill that can grill, air fry, bake, roast, broil, dehydrate, and even work as a flat-top griddle, the Ninja IG601 and Ninja IG651 Foodi XL Pro Indoor Grill & Griddle are two of the best options available in 2025.
At first glance, these two models look almost identical — and in many ways, they are. They share the same size, power, cooking functions, and overall performance. However, one key feature separates them and can significantly impact how you cook day to day.
Key Differences Between Ninja IG601 and IG651
The primary difference between the Ninja IG601 and IG651 is the inclusion of the Smart Cook System with Foodi Smart Thermometer on the IG651. This thermometer allows you to cook meat to precise internal temperatures automatically, eliminating guesswork. The IG601 does not include this feature and requires manual temperature checks.
Aside from this, both models share the same design, cooking power, XL capacity, and 7-in-1 functionality.
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Ninja IG601 vs IG651 Comparison Table
| Feature | Ninja IG601 | Ninja IG651 |
|---|---|---|
| Cooking Power | 500°F Grill Grate | 500°F Grill Grate |
| Functions | 7-in-1 | 7-in-1 |
| Smart Thermometer | No | Yes |
| Control Type | Digital Display | Digital Display + Smart Cook Presets |
| Size / Capacity | XL (4–6 servings) | XL (4–6 servings) |
| Best For | Budget-conscious cooks who already own a thermometer | Beginners or anyone who wants “set-it-and-forget-it” results |
Design & Build Quality
Both the Ninja IG601 and IG651 feature Ninja’s signature stainless steel and matte black finish, giving them a modern and durable appearance. The units feel solid and well-built, suitable for frequent use.
Each model includes a removable hood, allowing you to cook with the lid open for traditional grilling or closed for convection-style crisping. The grill grate, crisper basket, and griddle plate are ceramic-coated and PTFE/PFOA-free for safer cooking.
Cooking Functions (7-in-1 Versatility)
Both models are true 7-in-1 indoor cooking systems:
- Grill – High-heat indoor searing
- Air Crisp – Crispy fries, wings, and snacks
- Bake – Cakes, bread, casseroles
- Roast – Meats and vegetables
- Broil – Finish and caramelize
- Dehydrate – Jerky and fruit chips
- Griddle – Pancakes, fajitas, sandwiches
In terms of versatility, there is no difference between the IG601 and IG651.
Smart Cook System (Exclusive to IG651)
This is where the Ninja IG651 truly stands out. The built-in Foodi Smart Thermometer offers:
- 4 protein presets (beef, chicken, pork, fish)
- 9 doneness levels (rare to well-done)
- Automatic alerts when food reaches target temperature
Heat Performance & Cooking Results
Both models use a powerful independently heated grill grate capable of reaching 500°F. This allows you to achieve steakhouse-style searing and grill marks indoors.
The hood design locks in heat for faster cooking, while the flat griddle distributes heat evenly for breakfast foods and stir-fry meals.
Capacity & Family Use
The IG601 and IG651 are both XL-sized and can comfortably feed 4–6 people. You can grill multiple steaks, cook a large batch of fries, or prepare mains and sides at the same time.
Ease of Cleaning
Cleanup is simple thanks to dishwasher-safe ceramic-coated parts, including the grill grate, griddle plate, and crisper basket. The removable splatter shield helps keep grease off your countertops.
Price & Value
- Ninja IG601: Lower price, same cooking power
- Ninja IG651: Higher price due to Smart Thermometer
If you already own a thermometer, the IG601 offers excellent value. If convenience and precision matter, the IG651 justifies the extra cost.
Which One Should You Buy?
- Choose Ninja IG601 if you want identical cooking performance at a lower price.
- Choose Ninja IG651 if you want hands-free, precise doneness with zero guesswork.
Final Verdict
Both the Ninja IG601 and IG651 are outstanding indoor grills that replace multiple kitchen appliances. The decision comes down to whether the Smart Cook Thermometer is worth the extra cost for your cooking style.
If budget matters most, go with the IG601. If you want Ninja’s most advanced indoor grill experience, the IG651 is the better choice.
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