OpenAI's reported $500 Pro Max plan may run on Cerebras infrastructure
TestingCatalog reports that the proposed ChatGPT tier would add 'Fastest Work and Codex' to Pro, with higher usage limits also possible. OpenAI has not listed it on its pricing page.
By Ryan Merket · Published · Updated
Primary source: X
Why it matters
A possible Pro Max tier suggests OpenAI may package long-running ChatGPT work as a higher-priced subscription, but the report gives no price or feature details and OpenAI's published plan list does not include it.
TestingCatalog (@testingcatalog) reported on Thursday, September 24th, that OpenAI is developing a $500 ChatGPT subscription called Pro Max. The account says the plan will likely use Cerebras infrastructure. It describes "Fastest Work and Codex" as the only changes in the plan description compared with ChatGPT Pro, while noting that usage limits could also be higher.
OpenAI's published ChatGPT pricing page currently lists Free, Go, Plus, Pro, Business and Enterprise plans, with no Pro Max tier. TestingCatalog's post is a report of a possible product under development, not confirmation that customers can buy it. OpenAI has not confirmed the plan, its price, features or infrastructure provider.
TestingCatalog ties the rumor to long-running tasks, a category that could cover work requiring ChatGPT to take actions over time rather than answer a single prompt. The reported plan description adds "Fastest Work and Codex" compared with Pro, though the post does not explain what either change entails. Higher usage limits remain possible, according to the account, but it provides no allowance details.
The timing gives the rumor a near-term reference point. OpenAI's official DevDay 2026 announcement schedules the developer event for Tuesday, September 29th, in San Francisco, five days after TestingCatalog's post. TestingCatalog says more could be heard there, but that is its expectation, not a commitment from OpenAI. The official event announcement does not name a Pro Max plan.
If OpenAI ships the reported offer at $500, it would sit above an already premium Pro plan and give the company a way to charge for faster work, Codex access or higher usage limits. The report does not establish which of those features would be included, how much faster the service would be, or whether Cerebras would power the plan. Those details will determine what customers would get for the higher price.
OpenAI's current pricing page describes Pro as a plan for research and coding and advertises increased usage and maximum access to several features. Pro Max would therefore represent a higher-priced tier if the reported $500 price and name carry through to launch. That positioning remains unconfirmed, as does whether the plan description reflects a final offer or a working version.
For now, the concrete news is TestingCatalog's report of a $500 Pro Max plan, a likely Cerebras infrastructure arrangement and a description that adds "Fastest Work and Codex" to Pro. OpenAI's public pricing page has not added the tier, and its DevDay announcement has not promised it. Pro Max remains a reported development, not a confirmed product launch.