A gap between the two numbers is normal. OpenAI says Ads Manager, your analytics and other ad platforms may report different totals, and a difference does not necessarily mean an error (OpenAI Help Center). Your job is to find out whether the gap comes from counting rules or from a broken setup. I ask a team to run four checks, in order.
Why ChatGPT Ads and your analytics show different numbers
The two tools count the same purchase by different rules. Ads Manager gives credit to an ad click or to an ad view. Your analytics tool uses its own attribution model and its own data.
One purchase can count in Ads Manager and not in your analytics. The view-through window changes the Ads Manager total.
OpenAI lists these causes for a gap (OpenAI Help Center):
- Different attribution methods or attribution windows.
- Different event times, reporting time zones or date boundaries.
- Browser, consent and storage conditions that limit what each tool can measure.
- Different deduplication rules.
By default, Ads Manager puts a conversion on the date of the ad click or view, not the date of the purchase (OpenAI Help Center). If your analytics report dates conversions by purchase date, weekly totals can differ for that reason alone.
The first check: counting rules or a broken setup?
If all four answers below are yes, the gap comes from counting rules. If one answer is no, fix that part before you compare numbers.
Events reach the data source
No events means no conversions in Ads Manager. Ask your team: which data source do we send to, and did it receive events this week?
Source: OpenAI Help Center
The campaign tracks the event you send
An event can fire and still show 0 if the campaign uses a different conversion event. Old events do not backfill. Ask: which event does each campaign use?
Source: OpenAI Help Center
Browser and server copies share one event ID
Without the same Pixel ID, event name and event ID, one sale can count twice. Ask: do our pixel and server events use the same ID?
Source: OpenAI Help Center
You compare the same dates and windows
Different windows or time zones change totals without any fault. Ask: which click and view windows does our report use?
Source: OpenAI Help Center
Already running ChatGPT Ads, but not sure about the results?
Need an audit? I review your data source, events, deduplication and reporting windows, then send a written plan with what to fix first.
Request an auditWhat the pixel sends and what the Conversions API sends
The pixel sends events from the visitor's browser. The Conversions API (CAPI) sends events from your server, for example when your backend confirms a purchase (OpenAI Ads docs). You can use one or both for the same data source (OpenAI Help Center).
Catches the click reference
It stores the ad click reference (oppref) from the landing page URL in a first-party cookie. For you, this links visits to ads. Ask: is the pixel on every page an ad sends people to, and on checkout?
Source: OpenAI Help Center
Reports what your backend confirms
It does not capture the click reference by itself. Your server must store it and send it. Ask: do our server events include oppref?
Source: OpenAI Ads docs
The first copy wins
OpenAI keeps the first event with the same Pixel ID, event name and event ID, and ignores later copies. For you: one sale, one conversion. Ask: who owns the event ID?
Source: OpenAI Ads docs
What Event Quality Score measures, and what it does not
Event Quality Score (EQS) rates the conversion data that one data source sends (OpenAI Ads blog). It does not predict campaign performance and does not guarantee that a conversion matches an ad (OpenAI Help Center).
Daily, over 7 full days
The score uses 7 complete calendar days. For you, a fix shows in full only after about a week, not the next morning. Ask: when did we change the setup?
Source: OpenAI Help Center
Server events within 1 hour
One check looks for server events that arrive within 1 hour of the action. Ask: does our backend send events right away or in a nightly batch?
Source: OpenAI Help Center
Not proof of broken tracking
A low or missing score alone cannot show whether tracking works. Ask: do conversions appear in Ads Manager reports at all?
Source: OpenAI Help Center
Click-through vs view-through: what to compare, and when
A click-through conversion follows an ad click. A view-through conversion follows an ad view with no click, within one day (OpenAI Help Center). Ask your team to show both columns, not only the total.
| Click-through | View-through | |
|---|---|---|
| Counts when | Someone converts after an ad click | Someone converts after an ad view, with no click |
| Window in Ads Manager | 7, 14 or 30 days | 0 days (off) or 1 day |
| If both qualify | The click gets the credit | No credit |
| Your analytics | Can see the visit from the ad | There is no ad click to see |
Source for the first three rows: OpenAI Help Center. The last row is my reading.
OpenAI's help pages say the Conversions total includes eligible view-through conversions when the view window is 1 day, and counts click-through only at 0 days (OpenAI Help Center). Its API docs list view-through as a separate metric (OpenAI Ads docs). Check which one your report shows.
In an early analysis of global campaigns optimized for deeper-funnel outcomes, OpenAI found that 52.7% of eligible one-day view-through conversions happened within an hour of the ad impression (OpenAI Ads blog). When I judge spend, I read click-through first, then the total.
Reporting windows change what you see, not how campaigns optimize (OpenAI Ads blog).
Four tracking mistakes to rule out first
One event ID for different orders
OpenAI keeps the first event per ID, so real sales can drop as copies. Ask: does each order get its own event ID?
Source: OpenAI Help Center
Accepted is not credited
The Conversions API can accept an event that never gets ad credit. Ask: do we check reports, not only API responses?
Source: OpenAI Help Center
Server events without oppref
Without the click reference, server events are harder to match to clicks. Ask: do we store and send oppref?
Source: OpenAI Ads docs
Revenue from the wrong event
Order Created Sales and ROAS count only order_created events. Ask: do we send order_created for every purchase?
Source: OpenAI Help Center
Custom events cannot be optimization goals (OpenAI Ads docs), so pick a standard event before launch. For what changed in ChatGPT Ads this fall, read my ChatGPT Ads expansion post.
ChatGPT Ads conversion tracking FAQ
Do I need both the pixel and the Conversions API?
No. OpenAI accepts the pixel, the Conversions API or both. If you send both, use the same Pixel ID, event name and event ID, so one sale counts once. I prefer both when your backend confirms purchases, because the server copy does not depend on the browser.
Source: OpenAI Help Center
Why does Ads Manager show more conversions than GA4?
Often because the Conversions total can include view-through conversions, and your analytics cannot see an ad view. Different time zones, consent and date rules widen the gap. Check the click-through numbers alone first.
Source: OpenAI Help Center
What is a good Event Quality Score?
OpenAI does not publish a threshold in the help pages I checked. The score rates the data one source sends and refreshes daily over 7 complete days. It does not predict performance. Read the warnings and fix what you can verify in your setup.
Source: OpenAI Help Center
How long do ChatGPT Ads conversions take to show up?
OpenAI says attributed conversions can take about 24-48 hours to appear, and recent totals can change during processing. I wait at least 2 days before I compare Ads Manager with analytics.
Source: OpenAI Help Center
Does the attribution window change how my campaign optimizes?
No. OpenAI says these settings control attribution in reports, not how campaigns optimize. They do change reported conversions, sales, CPA and ROAS.
Sources: OpenAI Ads blog; OpenAI Ads docs
Can I turn off view-through conversions?
In reports, yes. Ads Manager lets you set the view-through window to 0 days, so the Conversions total counts click-through conversions only. You can also view click-through and view-through conversions separately.
Source: OpenAI Help Center
What changed in this guide
I update this guide when OpenAI changes how ChatGPT Ads measures conversions.
- 4 Nov 2026: First version.
Already running ChatGPT Ads, but not sure about the results?
Need an audit? I review your data source, events, deduplication and reporting windows, then send a written plan with what to fix first.
Request an audit