An unannounced always-on assistant dubbed "o" is undergoing testing at OpenAI, with traces of the feature surfacing publicly before being removed. While the company has neither confirmed nor denied development of this capability, users on X observed "o, your always-on assistant" temporarily listed among benefits for the $100 ChatGPT Pro subscription tier.
The feature appeared in promotional materials alongside other Pro plan perks: expanded Work and Codex usage limits, maximum memory allocation, 100GB of file storage, and priority access to experimental capabilities.
Technical configuration data uncovered references to a display_name labeled "o" paired with an email_suffix parameter set to "-o". This pairing suggests the assistant might eventually support some form of email functionality or email-based identity, which would align with the "always-on" positioning—allowing the system to assist users outside active ChatGPT sessions.
The exact scope of OpenAI's plans for this assistant remains unclear at this stage.
Potential reveal at DevDay 2026
OpenAI has announced DevDay 2026 will take place on September 29 in San Francisco. The gathering is anticipated to introduce multiple new capabilities, featuring technical presentations, live demonstrations, and additional tools that could provide clarity on the "o" initiative.
Separately, internal references to an "Aeon" system have surfaced in connection with custom agents designed for ChatGPT workspaces, though "o" appears to be positioned as a distinct consumer product rather than an enterprise-focused offering.