On August 31, 2026, OpenAI said its ad-supported free tier keeps ChatGPT available to "more than 1 billion weekly active users". OpenAI's September 8 statement repeated the milestone for all of its products. The story of ChatGPT nearing a billion is over; the open question is who pays for that scale.
What happened: OpenAI says ChatGPT has passed 1 billion weekly users
OpenAI confirmed the milestone in its own posts, a month after The Information reported it was close. The first page to tie 1 billion weekly users to ChatGPT by name was the ChatGPT Ads launch post.
- What changed: OpenAI now states more than 1 billion weekly users, up from 900 million on February 27.
- Who's affected: teams choosing among AI chatbots, and builders weighing OpenAI's reach.
- What to do: treat the user count as confirmed and the finance figures as reported until a public filing appears.
OpenAI's claims, in order: 900 million weekly ChatGPT users (February 27), "soon" 1 billion (March 31), more than 1 billion for ChatGPT (August 31) and for "our products" (September 8). At DevDay on September 29, it cited a "collective 1.2B weekly users".
Before and after: from "approaching" to confirmed
Here is what earlier coverage, including ours in August, got right and wrong.
| Claim | August version | Now (checked October 21, 2026) |
|---|---|---|
| Weekly users | Approaching 1 billion, unconfirmed | More than 1 billion, stated by OpenAI |
| 900 million milestone | March 2026 | February 27, 2026, with 50 million consumer subscribers |
| ChatGPT ad revenue | $100 million pilot | $1 billion annualized run-rate in under 200 days |
| OpenAI S-1 | Filed June 8 | Announced June 8; the submission date isn't stated |
| Anthropic's $47 billion run-rate | July | May, per Anthropic |
The money: Q1 cash burn was 65% of revenue, as reported
So far, ads, subscribers and investors pay. ChatGPT Ads hit a $1 billion annualized run-rate in under 200 days, OpenAI had more than 50 million consumer subscribers in February, and investors committed $122 billion in March, while Q1 burn was a reported $3.7 billion.
OpenAI hasn't published audited results, so these Q1 2026 numbers come from The Information, which cited shareholder documents.
| Q1 2026 metric (reported, unaudited) | Figure |
|---|---|
| Revenue | $5.7 billion |
| Cash burned | About $3.7 billion (65% of revenue) |
| Cash and securities | More than $73 billion |
| Gross margin | 33 to 39 percent |
OpenAI's own statements give fewer financial details. On March 31 it reported $122 billion in committed capital at an $852 billion valuation. It also said it was "generating $2B in revenue per month", about $24 billion a year. On June 8 it announced a confidential S-1 and said "it may be a while" before any listing.
Anthropic reports a bigger run-rate than OpenAI
Anthropic's last confirmed figure is higher than OpenAI's last stated one, though they come from different months. Anthropic's Series H announcement on May 28 put its run-rate above $47 billion. It raised $65 billion at a $965 billion valuation.
Bloomberg reported on August 17 that Anthropic's run-rate topped $65 billion by the end of July. Anthropic hasn't confirmed that. Ramp's May index put Anthropic at 34.4% of businesses with paid adoption, against 32.3% for OpenAI, using April data. A later Ramp release headlines "a rebound for OpenAI".
What it means for you
The user count settles reach, not cost or fit.
- ChatGPT users: the free tier now carries ads. OpenAI says the ad-supported tier helps keep ChatGPT available to more than 1 billion weekly users.
- Builders: at DevDay, OpenAI said it is opening ChatGPT as a shared surface to its "collective 1.2B weekly users".
- Platform buyers: compare on features and price, not headcount. Our ChatGPT, Claude and Gemini compared page lays them side by side.
What to do now
- Today: quote 1 billion weekly users as OpenAI's own claim, and say whether it covers ChatGPT or all products.
- Before a renewal: check Claude and ChatGPT pricing pages directly, since neither company has published audited costs.
- When the S-1 goes public: replace every reported figure in your notes with the filed numbers.
Still unconfirmed
- Whether 1.2 billion is ChatGPT alone. OpenAI's DevDay page says "collective" and doesn't define it.
- Audited finances. The Q1 revenue, burn and margin figures are reported, not filed.
- Anthropic's July run-rate. The $65 billion figure is Bloomberg's report, not Anthropic's statement.
