Several X accounts shared screenshots and comments that a “ChatGPT Pro Max” plan is in development and would cost $500 per month. The posts note that the plan description only adds the line “Fastest Work and Codex” compared with the existing Pro tier, and many users interpret this as a focus on speed rather than higher usage limits.
One post specifically linked the “Fastest Work” claim to Cerebras, citing the chip maker’s marketing that it can deliver 21× faster performance at a third of the cost of comparable hardware. Other users pointed to a leak from TestingCatalog that referenced internal app‑code mentioning a $500 tier and Cerebras infrastructure. No official announcement from OpenAI has been found yet; confirmation would likely come via an OpenAI blog post, a pricing page update, or an official X announcement.