The Complete List of ChatGPT Ad Specs and Best Practices

Preparing creative for ChatGPT ads starts with the format, image dimensions, and copy requirements. A single-image ad needs one visual that explains the offer. A multi-image ad gives advertisers more room to show product details, but every image still leads to the same destination.

This guide covers the ChatGPT ad specs documented by OpenAI as of October 29, 2026, including image sizes, text limits, creative examples, and checks before launch. Requirements can vary by upload method and account availability, so confirm the settings shown in Ads Manager before exporting your assets.

ChatGPT ad specs at a glance

OpenAI’s Ads Manager offers two image-based ad formats. Choose the format that gives you enough space to explain the product or service:

Format	Images	Image requirement	Copy limits (max. characters)	Destination / status
Single-image ad	1	Square PNG/JPG, up to 1200 × 1200 px in the bulk-upload workflow	Title: 50 Description: 100	One landing page
Multi-image ad	4-6	Each image square (1:1); verify other upload limits in Ads Manager	Title: 50 Description: 100	One shared landing page; Learn more CTA; open beta since October 26, 2026

For bulk uploads, OpenAI recommends 16–24 characters for titles and 32–48 for descriptions. These are recommended lengths; the maximums are 50 and 100 characters, respectively.

The single-image requirements above come from OpenAI’s bulk-upload instructions. Check the validation shown in Ads Manager for direct uploads and multi-image ads before exporting final assets.

What do ChatGPT ads look like?

ChatGPT ads appear below responses with a clear advertising label. A sponsored unit includes the advertiser’s name and favicon, a headline, description, image, and landing-page link.

The creative should make sense on its own. Someone should be able to understand the offer and what to expect after clicking without relying on the surrounding answer.

Single-image ChatGPT ads

Multi-image ChatGPT ads

ChatGPT ad image sizes and dimensions

ChatGPT ad image requirements depend on the upload method:

• Ads Manager CSV bulk upload: Use a square PNG or JPG no larger than 1200 × 1200 pixels, supplied through a publicly accessible image URL.

• Advertiser API uploads: OpenAI documents JPEG, PNG, or WebP images measuring at least 640 × 640 pixels.

• Multi-image creatives: Use four to six square images at a 1:1 aspect ratio. API creation also requires an account enabled for multi-image ads.

These specifications apply to their documented workflows. Check the validation requirements for your selected upload method, including any file-size limits, before final export.

ChatGPT ad headline and description limits

OpenAI separates maximum character limits from recommended copy lengths in its bulk-upload guidance:

• Title maximum: 50 characters.

• Description maximum: 100 characters.

• Recommended title length: 16–24 characters.

• Recommended description length: 32–48 characters.

Use the headline to identify the offer or practical benefit. The description should add useful information, such as a feature or next step, instead of repeating the headline.

• Sample headline: Keep Projects on Track

• Sample description: Plan tasks and deadlines with one shared view.

These examples use 22 and 46 characters, respectively, including spaces and punctuation. Both fit the recommended ranges. They illustrate copy structure and have not been tested for performance.

Landing-page and creative checks

A valid image is only one part of an ad that is ready to launch. Review the destination and the information used to create the ad:

• Offer relevance: Send visitors to the advertised product, collection, or service page.

• Mobile usability: Check that the page loads and the next action is easy to complete on a phone.

• Accurate information: Match prices, promotions, claims, and product availability across the ad and landing page.

• Crawler access: Ensure the destination is reachable and does not block OAI-AdsBot or OAI-SearchBot.

• Tracking: Add UTM parameters where appropriate and check the destination URL before launch.

Review creative-enhancement settings during approval. OpenAI says enhancements can adapt headlines, descriptions, language, image sizing, and destination URLs. When enabled, variations can run without individual review.

OpenAI’s announcement schedules automatic enablement for new and existing campaigns beginning October 30, 2026. Existing opt-outs are preserved, and campaign-specific settings take priority over account defaults. Review the settings before launch and confirm the current rollout status when preparing your campaign.

ChatGPT ad creative checklist

Before submitting your ChatGPT ad creative, confirm the following:

• Your account, market, campaign objective, and selected format are eligible.

• You have one square image or four to six distinct square images, depending on the format.

• Your files meet the requirements for the selected upload method.

• Titles stay within 50 characters and descriptions within 100.

• Every image in a multi-image ad uses the same destination URL.

• The landing page matches the offer, works on mobile, and supports crawler access and tracking.

• You have previewed the submitted creative, checked policy compliance, and reviewed enhancement settings.

Frequently asked questions

What image size should I use for ChatGPT ads?

For single-image bulk uploads, OpenAI specifies a square PNG or JPG no larger than 1200 × 1200 pixels. Multi-image ads require square images with a 1:1 aspect ratio. Verify additional upload limits in Ads Manager.

How many images can a ChatGPT ad contain?

A single-image ad contains one image. The Multiple images open beta supports four to six square images.

What are the ChatGPT ad text limits?

OpenAI’s published bulk-upload maximums are 50 characters for the title and 100 for the description. Recommended lengths are 16–24 characters and 32–48 characters, respectively.

Can multi-image ads link to different pages?

No. The documented multi-image setup uses one shared destination URL. Every image links to that page.

Do ChatGPT ads influence the assistant’s answers?

No. OpenAI says ads do not influence ChatGPT’s answers. Paid placements are separate and clearly labeled.

While the actual 3D development of an AR Lens requires Snap’s Lens Studio, and game ads require specific API integrations, media buyers and creative directors must still adhere to strict 2D delivery specs for Lenses and Filters.

The bottom line

Use the ChatGPT ad specs for your chosen format and upload method, then review the creative as a complete message. The image and copy should explain the same offer, and the landing page should give visitors what the ad promises.

Considering ChatGPT ads for your paid media strategy? Contact Strike Social to discuss your campaign goals, creative requirements, and measurement priorities.

Launching Your ChatGPT Ads Campaign

Mastering the list of ChatGPT ad specs is the foundation of any elite paid social strategy. By analyzing the dimensions, making heavy use of safe zones, and choosing the right formats, you ensure your brand’s message is delivered flawlessly.

Learn more about ChatGPT advertising here.