I asked ChatGPT for a grocery trick — and it cut my food bill in half

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I'm saving money, but also adding more variety to our weekly meals

Woman shopping with coupons at the grocery store
(Image credit: SelectStock/Getty)

Shopping for my family of five means I go to Costco, our neighborhood grocery store and either Target or Walmart every week. I spend a ridiculous amount of money each month feeding my family basic meals. So, when I decided to lean on a chatbot that I typically use for research and brainstorming, I didn’t expect it to beat my shopping apps, grocery budget spreadsheet and years of “meal planning instincts” — but that’s exactly what happened.

Like most families, my grocery bill had quietly ballooned. Between inflation, impulse buys and “we might need this,” I was regularly spending $300-$500 a week. I’d tried coupons, bulk shopping and rotating meal plans, but nothing really worked for saving big.

So I did what I do for everything now: I asked AI. I opened up the ChatGPT app and used the prompt: “Give me one grocery trick that could actually lower my bill.” The answer surprised me — and in a month, it cut my food bill in half.

What I asked ChatGPT

An open freezer drawer showing frozen vegetables in sealed bags

(Image credit: Shutterstock)

For the record, ChatGPT didn’t tell me to buy generic brands or how to be one of those super couponers that I see on TLC. It also didn’t lecture me for splurging occasionally on toys, sports equipment or clothes for my kids. Instead, it suggested something deceptively simple:

Shop your fridge first — and plan meals around what you already have.

Not “clean out your fridge.” Not “eat leftovers.” But a very specific process.

Here’s exactly what ChatGPT told me to do:

  • Before you shop, take 3 photos: Fridge, freezer, pantry
  • Send them to ChatGPT and ask: “Make me 5 meals using what I already have.”
  • Only buy what you need to complete those meals.

That’s it. No apps or coupons to clip. I didn't have to do any extra coupon clipping. Just my camera and ChatGPT.

What happened when I tried it

Woman shopping wearing Meta Ray Bans

(Image credit: Future)

I opened my fridge and immediately realized something embarrassing: I already had so much food. I had half a bag of spinach that was wilting by the minute, chicken breasts in the freezer, pasta, canned tomatoes and beans in the pantry.

I had a lot of random odds and ends that never made it into a meal, so I snapped photos and sent them to ChatGPT.

Within seconds, it suggested delicious-sounding meals like:

  • Chicken and veggie pasta
  • Spinach and feta omelets
  • Chicken tacos using pantry spices
  • Bean and tomato soup
  • Stir-fry using frozen vegetables

Suddenly, I didn’t need a “big grocery haul.” I just needed a few filler items — maybe $40 worth — instead of my usual $200. It even gave me the recipes for each of the suggestions.

Why this actually works

Woman scraping food on plate into a bin

(Image credit: Shutterstock)

There's one thing that surprised me probably even more than saving real money. Working with ChatGPT on groceries changed my mindset. Before this experiment, I mostly bought the same groceries to make the same meals each week. But by using up what we have before shopping for more, it made me discover new meals and added a variety — something my weeknight meals had been lacking lately.

After the experiment, I was more aware of food before it went bad, avoided overbuying "just in case" and stopped making duplicate purchases. And for me, that's where the real savings came from.

My results

a photo of a dinner from the Tom Brady diet

(Image credit: Future/Tom's Guide)
  • Before ChatGPT: ~$350–$400 per week
  • After using this trick: ~$200–$250 per week

Interestingly enough, the more I use this method, the smarter my shopping got. I started buying versatile ingredients instead of random extras and thinking in "meal components" instead of individual dishes. Another shift from this experiment is that my freezer became far more organized because I had to know what I had before I shopped for more.

ChatGPT became a legit kitchen assistant.

Bottom line

This tip is extremely simple and something that has crossed my mind, but not to this extent. The vibe was more, "I should cook something with that before it expires." Now, I actually do use what I have because ChatGPT helped me devise a plan with intent.

I didn’t expect a single AI prompt to change how I grocery shop — but this one did. If you’re tired of overspending, wasting food or staring blankly at your fridge, this might be the simplest, most practical AI hack you can try today.

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Amanda Caswell
Amanda Caswell
AI Editor

Amanda Caswell is an award-winning journalist, bestselling YA author, and one of today’s leading voices in AI and technology. A celebrated contributor to various news outlets, her sharp insights and relatable storytelling have earned her a loyal readership. Amanda’s work has been recognized with prestigious honors, including outstanding contribution to media.

Known for her ability to bring clarity to even the most complex topics, Amanda seamlessly blends innovation and creativity, inspiring readers to embrace the power of AI and emerging technologies. As a certified prompt engineer, she continues to push the boundaries of how humans and AI can work together.

Beyond her journalism career, Amanda is a long-distance runner and mom of three. She lives in New Jersey.

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