Story 1: Gemini's AI Mode just crossed 1 billion users

Google's AI Mode passed one billion users this month. Gemini 3.5 Flash became the model's default inside that surface. A core update also landed mid-week, reshuffling rankings across search.

The market-share data backs up the shift. ChatGPT still leads global AI chatbot traffic at 53.9%. But that share fell from roughly 76% a year ago to about 54% by May 2026. Gemini grew from under 9% to nearly 28% over the same stretch.

📊 The Numbers

Google AI Mode users: 1B+. ChatGPT web traffic share: 53.9% (down from ~76% a year ago). Gemini share: 27.9% (up from under 9%). Claude share: 9.2%.

What's driving the shift isn't a better chatbot. It's placement. Gemini now sits inside Search, the product most people already open every day. That default position is doing more work than any standalone chatbot campaign could.

What Gemini's growth means for your search strategy

If your GEO tracking only monitors ChatGPT citations, you're missing where the volume actually moved. AI Mode responses now touch a meaningful share of everyday Google searches, not just standalone chatbot sessions.

The practical move: audit your brand's presence inside Gemini's AI Mode the same way you'd audit ChatGPT citations. If you're already running a tracker, add Gemini as a monitored surface if it isn't one yet.

This doesn't replace traditional SEO. Search still sends the most reliable, highest-intent traffic. But the AI Mode surface area just got much bigger, and it's now the default experience for a huge share of Google's users.

Story 2: OpenAI opened the door to sign-in

OpenAI began rolling out "Sign in with ChatGPT" in beta on July 29, 2026. The feature lets people create or link accounts with partner apps from inside a ChatGPT conversation.

Launch partners include Airtable, GitLab, HubSpot, Notion, Supabase, and Vercel. A user can go from asking ChatGPT a question to being logged into one of those tools without ever leaving the chat.

⚠️ What We Don't Know Yet

OpenAI hasn't published which categories come next or what qualifies a company for partner status. Early access looks limited to product-led SaaS tools with a self-serve signup flow. If your product fits that profile, this is worth watching closely.

Should marketers care about ChatGPT sign-in?

If you sell a SaaS product with a free tier, yes. This is a new acquisition surface — similar in shape to how "Sign in with Google" changed onboarding flows a decade ago.

The practical step right now: watch for OpenAI's partner program to open more broadly. In the meantime, simplify your own onboarding, since a chat-to-signup handoff has zero tolerance for friction.

Also worth noting this week

Google rolled out AI Performance Insights inside Merchant Center. Ecommerce sellers can now see AI-generated impressions, clicks, and engagement, separate from standard Shopping metrics — worth a look if you run Google Shopping campaigns.

Meta launched a free 2026 Holiday Insights Center on July 27, giving small businesses consumer research and platform benchmarks ahead of the holiday season.

HubSpot is embedding agentic AI directly into its CRM, letting teams build and manage AI agents without leaving the platform where their customer data already lives.

Semrush folded its ContentShake AI writer and a new AI SEO Toolkit into one workflow, aimed at teams producing SEO content at volume. Worth a look if you're comparing AI writing assistants for content production.

The one thing to do before next week

Check whether your brand shows up inside Gemini's AI Mode for a query you'd expect to win. If you don't know the answer, that's this week's homework — not next quarter's.

Frequently Asked Questions

What is Google's AI Mode and why does the 1 billion user number matter?
AI Mode is Google's conversational search experience inside the main Search app. Passing one billion users means AI-generated answers are now a default part of search for a huge share of Google's audience, not a niche feature. That changes how much weight AI Mode visibility should carry in your SEO and GEO planning.
How is "Sign in with ChatGPT" different from a regular ChatGPT plugin?
Plugins let ChatGPT pull data from or take actions inside another app during a conversation. Sign in with ChatGPT is an identity layer — it lets a user create or link an account with a partner app using their existing ChatGPT login, similar to "Sign in with Google." It's about account creation and onboarding, not in-chat functionality.
Is Gemini overtaking ChatGPT?
Not yet. ChatGPT still leads global AI chatbot web traffic at 53.9%. But Gemini's share nearly tripled over the past year, from under 9% to almost 28%, while ChatGPT's share fell from around 76%. The trend line matters more than the current snapshot.
What does AI Performance Insights show in Merchant Center?
It surfaces metrics specific to AI-powered shopping experiences — AI-generated impressions, clicks, and engagement — separate from standard Shopping campaign reporting. It gives ecommerce sellers visibility into how AI surfaces are influencing product discovery, which wasn't broken out before.
Should I add Gemini to my GEO tracking if I only track ChatGPT today?
Yes, if your buyers use Google regularly, which most do. AI Mode's scale means missing Gemini citations leaves a real visibility gap. Add it as a tracked surface alongside ChatGPT and any other assistant your audience uses.