The short answer
On 1 October 2026 OpenAI added a “Try on” button to clothing and accessory listings in ChatGPT shopping results. A shopper uploads a selfie and ChatGPT generates a picture of the item on them. OpenAI’s own help centre says the images “do not guarantee fit or size” and tells shoppers to check the merchant’s measurements, product details and return policy before buying.
For Shopify fashion brands that means two things. More shoppers will see your products on themselves before they reach your store. And the question ChatGPT leaves open, which size to order, now has to be answered on your product page.
Rendered Fits is a Shopify app that answers that sizing question inside a merchant’s store. We are not affiliated with OpenAI, and Rendered Fits does not connect to ChatGPT’s try-on. This page sets out what OpenAI has published, what it means for fashion brands and what to check this week.
What OpenAI launched
The facts below come from OpenAI’s Shopping with ChatGPT Search help page, checked on 2 October 2026, and launch coverage by TechCrunch and Engadget.
| Question | What has been published |
|---|---|
| Where it appears | A “Try on” button on product listings for clothes and accessories in ChatGPT shopping results. Shoppers can also upload a picture of an item, such as a screenshot, and ask ChatGPT to show it on them. |
| What the shopper provides | A selfie, taken or uploaded. |
| How the image is made | ChatGPT Images. Launch coverage names the new ChatGPT Images 2.5 model. |
| Photo storage | Reference photos are saved for future try-ons. Shoppers can change or remove them under Settings → Personalization → Reference photos. |
| Availability | ChatGPT on mobile and web, announced as a global launch on 1 October 2026. |
| Fit and size | OpenAI says the images may not be exact and do not guarantee fit or size. It tells shoppers to check the merchant’s measurements, product details and return policy. |
| Launched alongside | Favorites: shoppers can save products and folders to their ChatGPT Library. |
How your products reach ChatGPT
OpenAI says that for merchants on Shopify, product data is already integrated into ChatGPT through Shopify Catalog, and individual merchants need to do no extra work. Merchants on other platforms can apply to send OpenAI a direct product feed.
When it chooses products, ChatGPT considers structured metadata such as price and product description, other third-party content and the shopper’s own context. OpenAI also says ChatGPT may write simplified product titles and descriptions to make results easier to read.
In practice: if you sell clothing on Shopify, shoppers may already be able to try your products on in ChatGPT, generated from your product data, without any action from you. Whether a particular product appears depends on ChatGPT’s result selection; OpenAI notes that not every available product will be shown.
What it means for Shopify fashion brands
1. Seeing it on yourself is becoming normal
TechCrunch notes that Google launched a competing try-on in 2025. With ChatGPT adding one globally, shoppers will increasingly expect to see clothes on themselves before buying. That is our reading of the market, not a measured change in shopper behaviour.
2. The size question lands on your product page
ChatGPT’s try-on answers “how might this look on me?” It does not answer “which size should I order?” For that, OpenAI points the shopper to the merchant’s measurements and return policy. A shopper who clicks through from ChatGPT may arrive with the look already chosen and one question left. If the product page cannot answer it clearly, the shopper has to guess, order two sizes or leave.
3. Your size information needs to be readable, not just visible
AI assistants work from text and structured data. In our Shopify Size Chart Report 2026, which scanned 829 stores with clothing sizes on 24 September 2026, 31.6% of stores had a size chart readable as text on the page. 27.1% showed their chart as an image and we found no chart for 27.7%. Separately, 20.3% of 107,138 sized products said how they fit.
The sample is not random and the scanner did not run JavaScript, so a chart missing from page text may still appear to shoppers after a click. The study measured available information, not sales or returns. Method, denominators and limits.
4. Your product images do more work
A try-on image can only be as faithful as the product imagery behind it. Clear images that show the whole garment, its true colour and its details give any try-on, in ChatGPT or on your own store, better material. Check how distinctive prints, necklines and closures come through when you test your own products.
ChatGPT Try On vs a fitting room on your own store
| ChatGPT Try on | On-store fitting room (for example, Rendered Fits) | |
|---|---|---|
| Where it happens | Inside ChatGPT, before the shopper reaches your store | On your product page, next to Add to cart |
| Question it answers | How might this look on me? | Which size should I order, and how might it look? |
| Size advice | None. OpenAI says images do not guarantee fit or size | A size for that exact product, from your own size chart, fit notes and garment measurements, where the sizing data is usable |
| Whose data | Product data from Shopify Catalog, merchant feeds and third parties | Your catalogue and your size information |
| Presentation | ChatGPT’s interface; titles and descriptions may be simplified | Your theme and your product page |
| Outfits | Can find similar items from an outfit photo | Complete the Look: outfits from your catalogue, with every piece sized |
| Cost to the merchant | No merchant fee described in OpenAI’s help page | Free for one product; paid plans for the full catalogue (current pricing) |
A size recommendation is guidance, not a guarantee of physical fit. Rendered Fits needs supported products and usable sizing data, and it does not promise a correct result for every item. For the wider distinction, see virtual try-on vs size recommendation.
What to do this week
- See what shoppers see. Ask ChatGPT for a product you sell, open the listing and press Try on. Check the title, price and image, and whether a shopper could tell which size to choose.
- Make size information readable as text. Put the chart on the product page as a text table, not only as an image or pop-up. Run the free size chart audit or the AI agent fit check on a product URL.
- Write fit notes into product descriptions. For example: “runs small, size up if between sizes”, plus the model’s height and the size they wear. Product descriptions are among the data ChatGPT considers. Use the size chart checklist.
- Use full, accurate garment images. Show the whole garment, its true colour and key details.
- Answer the size question on the page. Give shoppers arriving from ChatGPT a size for that product, worked out from your own chart. That is what Rendered Fits does: see how size recommendation works.
- Keep your return policy easy to find. OpenAI tells shoppers to check it before buying.
- Measure the traffic. Watch for sessions referred by chatgpt.com in your analytics, and compare their size-related returns with other channels once the return window has closed. Our measurement plan explains the definitions.
Where Rendered Fits fits
Rendered Fits adds a sizing-led fitting room to Shopify fashion product pages: a product-specific size recommendation, Complete the Look outfits with every piece sized, and optional AI try-on from the shopper’s own photo. It runs in your theme, on your product pages.
ChatGPT can bring a shopper to the product. Rendered Fits helps them choose the size once they arrive.
Rendered Fits offers Free at $0 for one selected product with 5 images per monthly allowance period. Complete is $349/month with 1,000 Try-ons per paid cycle and a 14-day trial with 50 images total. Enterprise is $999/month with 5,000 images and no trial. Check current plans and allowances, the Shopify App Store listing and the product demo.
Frequently asked questions
What is ChatGPT virtual try-on?
It is a Try on button on clothing and accessory listings in ChatGPT shopping results, launched by OpenAI on 1 October 2026. The shopper uploads a selfie and ChatGPT Images generates a picture of the item on them. It works in ChatGPT on mobile and web.
Does ChatGPT try-on tell you what size to buy?
No. OpenAI's help centre says try-on images do not guarantee fit or size and asks shoppers to check the merchant's measurements, product details and return policy before buying. The size decision is left to the merchant's product page.
Can shoppers try on products from my Shopify store in ChatGPT?
Possibly. OpenAI says Shopify merchants' product data is already integrated into ChatGPT through Shopify Catalog, with no extra work for individual merchants. Whether a specific product appears, and with a Try on button, depends on ChatGPT's result selection.
Does ChatGPT keep the selfie used for try-on?
OpenAI says reference photos are saved for future try-ons. Shoppers can change or remove them in ChatGPT under Settings, Personalization, Reference photos.
Do Shopify fashion brands still need their own sizing or try-on tool?
ChatGPT's try-on happens before the shopper reaches your store and gives no size advice. Shoppers who arrive on your product page still have to choose a size. A sizing tool on the page answers that with your own size data; a try-on preview there is optional.
Is Rendered Fits connected to ChatGPT?
No. Rendered Fits is not affiliated with OpenAI and does not integrate with ChatGPT's try-on. Rendered Fits works on the merchant's own Shopify product pages.
Sources
- OpenAI Help Center, Shopping with ChatGPT Search, checked 2 October 2026.
- TechCrunch, ChatGPT can now virtually try on clothes for you, 1 October 2026.
- Engadget, ChatGPT can now help you virtually try on clothes, 1 October 2026.
- Rendered Fits, Shopify Size Chart Report 2026 (829 stores, 107,138 sized products, collected 24 September 2026, CC BY 4.0).
We will update this page as OpenAI publishes more detail. Product capabilities and prices for Rendered Fits are on the product facts page.