Vendor reportGraphite and Similarweb, 2026

ChatGPT Ads CTR varies significantly by country, almost 2% in Brazil vs. 0.6% in New Zealand

Channel validation

ChatGPT Ads: All-time ad click-through rate (CTR) by market

ChatGPT Ads: All-time ad click-through rate (CTR) by market
Market	All-time CTR (%)
Brazil	1.91%
Mexico	1.55%
Japan	1.53%
South Korea	1.21%
Canada	0.75%
United Kingdom	0.74%
United States	0.73%
Australia	0.67%
New Zealand	0.6%

Reader Note:: Figure reports all-time ad CTR across the nine live ChatGPT ad markets from March 30 to September 30, 2026 using Similarweb data. Brazil leads at 1.91%, followed by Mexico at 1.55% and Japan at 1.53%; the United States is 0.73%. Similarweb discloses percentages and shares only, and the panel size is not disclosed.
Evidence:: Observed behaviour
Vendor interest:: Moderate — This comes from a company with a commercial interest in this market, so it is not a neutral source.
Sample:: Similarweb user panel across 9 live ChatGPT ad markets (panel size not disclosed), plus Graphite analysis of 95k+ US ChatGPT ads from 500+ advertisers, 70k+ creatives, 50k+ headlines, and 8k+ landing pages from April to mid-August 2026.

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Comparing yourself against a similar segment, and choosing what to test next.

Not for

Saying that one thing caused another, or predicting what you would get.
This comes from a company with a commercial interest in this market, so it is not a neutral source.
The source says how much it looked at, but not how any of it was chosen.

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Share of each generation who discover new brands via influencer endorsements
Generation	Share who discover brands through influencers (%)
Gen Z	20%
Millennials	17%
Gen X	12%
Baby Boomers	5%

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ChatGPT Ads CTR varies significantly by country, almost 2% in Brazil vs. 0.6% in New Zealand

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