Simon Willison’s Weblog

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6 posts tagged “ads”

2026

Our approach to advertising and expanding access to ChatGPT. OpenAI's long-rumored introduction of ads to ChatGPT just became a whole lot more concrete:

In the coming weeks, we’re also planning to start testing ads in the U.S. for the free and Go tiers, so more people can benefit from our tools with fewer usage limits or without having to pay. Plus, Pro, Business, and Enterprise subscriptions will not include ads.

What's "Go" tier, you might ask? That's a new $8/month tier that launched today in the USA, see Introducing ChatGPT Go, now available worldwide. It's a tier that they first trialed in India in August 2025 (here's a mention in their release notes from August listing a price of ₹399/month, which converts to around $4.40).

I'm finding the new plan comparison grid on chatgpt.com/pricing pretty confusing. It lists all accounts as having access to GPT-5.2 Thinking, but doesn't clarify the limits that the free and Go plans have to conform to. It also lists different context windows for the different plans - 16K for free, 32K for Go and Plus and 128K for Pro. I had assumed that the 400,000 token window on the GPT-5.2 model page applied to ChatGPT as well, but apparently I was mistaken.

Update: I've apparently not been paying attention: here's the Internet Archive ChatGPT pricing page from September 2025 showing those context limit differences as well.

Back to advertising: my biggest concern has always been whether ads will influence the output of the chat directly. OpenAI assure us that they will not:

  • Answer independence: Ads do not influence the answers ChatGPT gives you. Answers are optimized based on what's most helpful to you. Ads are always separate and clearly labeled.
  • Conversation privacy: We keep your conversations with ChatGPT private from advertisers, and we never sell your data to advertisers.

So what will they look like then? This screenshot from the announcement offers a useful hint:

Two iPhone screenshots showing ChatGPT mobile app interface. Left screen displays a conversation about Santa Fe, New Mexico with an image of adobe-style buildings and desert landscape, text reading "Santa Fe, New Mexico—often called 'The City Different'—is a captivating blend of history, art, and natural beauty at the foot of the Sangre de Cristo Mountains. As the oldest and highest-elevation state capital in the U.S., founded in 1610, it offers a unique mix of Native American, Spanish, and Anglo cultures." Below is a sponsored section from "Pueblo & Pine" showing "Desert Cottages - Expansive residences with desert vistas" with a thumbnail image, and a "Chat with Pueblo & Pine" button. Input field shows "Ask ChatGPT". Right screen shows the Pueblo & Pine chat interface with the same Desert Cottages listing and an AI response "If you're planning a trip to Sante Fe, I'm happy to help. When are you thinking of going?" with input field "Ask Pueblo & Pine" and iOS keyboard visible.

The user asks about trips to Santa Fe, and an ad shows up for a cottage rental business there. This particular example imagines an option to start a direct chat with a bot aligned with that advertiser, at which point presumably the advertiser can influence the answers all they like!

# 16th January 2026, 9:28 pm / ads, ai, openai, generative-ai, chatgpt, llms

2010

Three new features for reddit gold. Reddit’s experiments with a subscriber program are interesting to watch. 9,000 people signed up as subscribers without there being any benefit at all, and they’re now being rewarded with the ability to opt out of ads and access to computationally expensive features (like different ways of sorting their own user page) that wouldn’t scale for the entire user base.

# 20th July 2010, 5:54 pm / ads, reddit, scaling, recovered, subscriptions

Vintage Ad Browser. Fantastic. 100,000+ vintage advertisements scanned and organised by date and topic, going all the way back to the 1840s and covering every decade in between. An absolute gold mine.

# 6th January 2010, 9:04 am / ads, advertising, archive, design, history

2009

Google Analytics goes async. This is excellent news—the latest version of the Google Analytics JavaScript is designed to allow for asynchronous loading, so it won’t hold up the rendering of your page. Analytics and banner ads are the two worst offenders when it comes to slowing down page loads. Now if only a banner ad vendor would follow suit...

# 2nd December 2009, 6:30 pm / ads, analytics, async, google, google-analytics, javascript, performance, steve-souders

How to avoid ads in gmail. “After extensive testing I’ve discovered you need 1 catastrophic event or tragedy for every 167 words in the rest of the email.”

# 31st July 2009, 1:40 am / ads, gmail

2007

How Ads Really Work: Superfans and Noobs. My variant on this idea is to serve ads only on content that’s at least 6 months old. I’ve made $473.98 since January.

# 1st June 2007, 9:10 pm / ads, matt-haughey