OpenAI is reportedly testing a $500-per-month ChatGPT Pro Max subscription, based on code references, screenshots and posts from AI researchers and leak trackers. The proposed plan would cost 25 times the $20 Plus subscription and more than twice the $200 Pro tier launched in December 2024. Unlike a simple increase in chat limits, the reported differentiation is faster processing for OpenAI's Work and Codex agent tools, along with maximum memory allocation and 100GB of file storage. OpenAI has not confirmed the tier. The reports emerged ahead of its DevDay conference on September 29, where the company has typically introduced new pricing tiers. OpenAI's existing subscription ladder includes $100 and $200 Pro plans, although new sign-ups for the $200 tier were paused on September 10, 2026, after demand for GPT-6 Astra strained infrastructure. The proposed price would sit above Anthropic's $100-to-$200 Claude Max plans and Google's $100 AI Ultra plan, which was reduced from $250 in May.