OpenAI has stopped taking new subscriptions and upgrades for ChatGPT Pro 20X, the company’s $200-a-month plan. Current subscribers are not affected.
OpenAI said Astra-fueled demand blew past what it expected, and it no longer has enough compute to keep the experience where it wants it. No restart date was given. Just this: the company is trying to add capacity as fast as it can.
Help center confirmation and Tibo’s warning
OpenAI’s help center has confirmed the move.
The report points to Thibault Sottiaux, known inside the company as Tibo, OpenAI’s head of core product and platform and the former lead of Codex. He said Astra’s performance triggered demand at a scale OpenAI had never seen. In a Sept. 9 post, he warned: "Demand for Astra is unlike anything we’ve seen before, and we’re pulling every lever we can… If this keeps going, we may need to pause new Pro subscriptions."
Now that warning has become an official suspension.
Astra burns through quota faster
The piece says Astra costs more to run than GPT-5.6 Sol. OpenAI had already warned users that Astra would eat through Work/Codex quota faster, with metered pricing at roughly 2.5 times Sol’s rate.
As for access, the most powerful Pro version of GPT-6 Astra is limited to Pro, Business, and Enterprise users. The report says Pro 5X gets 50 uses per week, while Pro 20X gets 200 uses per week.
OpenAI launched GPT-6 Astra on Sept. 3 and called it the "strongest artificial intelligence." It also leaned on the AGI era in its messaging. That set off intense debate.
Why the most expensive tier went first
The report asks a fair question: why was Pro 20X paused first, instead of cheaper options like Go, Plus, or Pro 5X?
Its answer comes down to economics. In OpenAI’s current subscription setup, Pro 20X has the highest listed price and probably the smallest user base. But it may also be the cheapest plan per unit of compute, while also being one of the most heavily used. That would make it an obvious source of strain.
Going from Pro 5X to Pro 20X means paying twice as much for four times the quota. Pro 20X also comes with unlimited desktop voice and other perks. By that math, the highest-priced tier also gives the biggest discount.
Utilization thresholds and heavy users
Citing SemiAnalysis, the article says that if OpenAI’s and Anthropic’s subscription plans are used all the way up to their weekly caps and then compared with standard API pricing, OpenAI starts losing money on Plus and Pro 5X once utilization goes past 11.4%. For Pro 20X, gross margin turns negative at only 5.7%. Anthropic’s comparable figure is about 10%.
The report says this estimate does not include the reset credits that Tibo sometimes hands out.
And the people who buy Pro 20X? The report says they are often the same people who max it out: developers running long-chain Agent tasks, leaving Codex on overnight, or sending hundreds of tasks in a single day.
A prior assumption no longer holds
The article argues that Pro 20X being effectively sold out points to a bigger change. Companies like OpenAI seem to have built coding-focused plans around the idea that most users would not consume their full quotas. After Astra launched, heavy-user behavior appears to have broken that idea.
Peter Steinberger, founder of Lobsters, also said subscribing quickly would be the best move.
This report was published by MarsBit and says the original article came from the WeChat account "Synced," written by "Synced, focused on large models," and edited by the publication’s editorial team.