It was a rainy Sunday. I wanted grilled steak but could not go outside. That is when I first looked into indoor grills. I needed the best one for my kitchen. I tested both models to see which one cooks better. Here is my honest look at the Ninja FG551 Vs AG400.
Ninja FG551 Review
I brought this big grill home for a large family dinner. The smart meat probe caught my eye right away. I hoped it would make cooking thick steaks easy. This model is known for its large size and six cook modes.
Pros and Cons
Here is what I loved and what I did not like. This table shows my main thoughts on the grill.
| Pros | Cons |
| Huge space for food | Takes up a lot of counter room |
| Meat probe works great | Heavy to lift and move |
| No smoke in the house | Fan noise is a bit loud |
| Cooks food very fast | Hard to store in small cabinets |
My Thoughts After Two Months
I have used this grill a lot over the past few weeks. It saved my dinner when I forgot to thaw chicken. The smart probe cooks meat just right every single time. The food tastes like it came from an outdoor fire.
I love the huge grill space for my big meals. I can fit six steaks at once without a problem. But, washing the heavy parts can tire my hands out. The grill is quite heavy to move around the kitchen.
Recommendation
This grill is perfect for large families. It is great if you want to cook many steaks at once. It is not good for small kitchens with little space. Single folks might find it too big for daily use.
Ninja AG400 Review
I tested this grill on a busy work night. I wanted a quick meal without a big mess. It has a smart probe just like the larger model. It offers five simple ways to cook your food. This one feels a bit more compact for daily use.
Pros and Cons
Here are the good and bad points I found. I hope this table helps you see the facts.
| Pros | Cons |
| Fits on small counters | Cooks less food at once |
| Very easy to clean | Probe wire gets in the way |
| Great smart probe | Lacks the broil function |
| Heats up very quickly | Basket is a bit small |
My Daily Cooking Experience
I put this grill on my kitchen island last month. It heats up so fast for my quick lunches. The smart probe is a huge help for cooking pork chops. I never have to guess if the meat is done.
The smaller size is nice for my quick weeknight meals. It fits easily under my top cabinets when not in use. I do miss the extra space when friends come over. Cooking for a crowd means I work in shifts.
Recommendation
This model is perfect for couples or small families. It fits well in small apartments or dorms. It is not good if you host big dinner parties. Do not buy this if you need to cook six steaks at once.
Detail Comparison for Ninja FG551 Vs AG400
Picking the right grill can feel very hard. Both models do a great job with meat. Let us look closer at how they match up. Here are five key areas to think about.
Capacity & Size: Ninja FG551 Vs AG400
The size difference is the first thing I noticed. The extra large grill lets me cook so much more food. The smaller model is much easier to store away.
| Feature | Ninja FG551 | Ninja AG400 |
| Grill Size | Extra Large (fits 6 steaks) | Standard (fits 4 steaks) |
| Counter Space | Needs a lot of room | Fits almost anywhere |
Rating:
- Ninja FG551: 9/10
- Ninja AG400: 7/10
Cooking Performance: Ninja FG551 Vs AG400
Both grills give meat a great char mark. The big grill gets hotter faster across the wide plate. The smart probes make both machines cook meat perfectly.
| Feature | Ninja FG551 | Ninja AG400 |
| Char Marks | Deep and dark | Very good |
| Heat Spread | Very even | Good for small batches |
Rating:
- Ninja FG551: 9/10
- Ninja AG400: 8/10
Ease of Use: Ninja FG551 Vs AG400
Both models have screens that are easy to read. You just press a few buttons to start cooking. I found the smaller grill a little simpler to handle daily.
| Feature | Ninja FG551 | Ninja AG400 |
| Controls | Touch screen | Simple buttons |
| Probe Setup | Very easy | Very easy |
Rating:
- Ninja FG551: 8/10
- Ninja AG400: 9/10
Cleaning & Maintenance: Ninja FG551 Vs AG400
Washing grease off indoor grills is never pure fun. Both machines have parts that can go in the dishwasher. The heavy grates on the big model take more effort to scrub.
| Feature | Ninja FG551 | Ninja AG400 |
| Part Weight | Heavy and bulky | Light and easy |
| Splatter Shield | Needs a hard scrub | Quick to wipe down |
Rating:
- Ninja FG551: 7/10
- Ninja AG400: 9/10
Cooking Speed: Ninja FG551 Vs AG400
Hot air moves very fast in both machines. I found the big grill cooks huge meals in less time. The smaller one is great for quick single plates.
| Feature | Ninja FG551 | Ninja AG400 |
| Heat Up Time | Takes a few minutes | Super fast |
| Big Meals | Done in one batch | Needs multiple batches |
Rating:
- Ninja FG551: 9/10
- Ninja AG400: 8/10
Conclusion
Choosing between these two great grills comes down to your needs. If you cook for a crowd, the big one wins. If you want a quick meal for two, get the small one. I hope my honest guide helps you decide.