OpenAI's always-on agent leaks as single letter 'o' ahead of DevDay

OpenAI's unreleased next-gen always-on agent appears to be named lowercase "o," with clues surfacing on September 26: references to "o" briefly appeared in ChatGPT web code and some users' upgrade pages, which the community took as genuine evidence of an unreleased product.

Confirmed

The product name "o" (lowercase) does appear in ChatGPT's internal configuration and related web code, independently reported by multiple sources including @testingcatalog, @ExpertAnnual19, and @markk.
"o" shows up as a display name in internal configuration, paired with a "-o" email suffix, suggesting the assistant will support email handling.
According to OpenAI engineer Thibault Sottiaux on X, the codename was seemingly leaked accidentally by an OpenAI employee, and the community widely considers the clues genuine.

Not Yet Confirmed

@ExpertAnnual19 claims "o" will be available to all Pro-tier users and include Fast Mode, though this is unverified officially.
@markk says the product will launch at Tuesday's DevDay; @testingcatalog also reports it may be unveiled during Sam Altman's opening keynote at DevDay on September 29, but the launch timing and final form remain speculation.
On positioning, multiple posts describe it as a Grok-like persistent bot (also mentioning Muse) that runs in the cloud — this is leakers' relayed info rather than an official statement.

Why It Matters

If true, this would be OpenAI's first consumer-facing always-on agent product, shifting from a "conversational assistant" to one that stays online and proactively handles tasks like email, directly rivaling xAI's persistent Grok bot.
The codename was accidentally leaked by its own employees and has repeatedly appeared in product code, suggesting the product may be in a near-launch configuration stage — DevDay is worth watching closely.

2026-09-26 ~ 2026-09-26 · 5 related posts

Primary sources

Leak: OpenAI to Announce Always-On Agent "o" at DevDay, Possibly With Its Own Email — testingcatalog · 2026-09-26 20:11 (UTC+08:00)
Leak: OpenAI's always-on cloud assistant is named "o", due at DevDay — mark_k · 2026-09-26 20:12 (UTC+08:00)
Leak: OpenAI's always-on agent will be called 'o', coming to all Pro tiers — Expert_Annual_19 · 2026-09-26 21:27 (UTC+08:00)

OpenAI's rumored always-on assistant is named "o" and may handle email ahead of DevDay — gaganghotra_ · 2026-09-26
[source] Leak: OpenAI to Announce Always-On Agent "o" at DevDay, Possibly With Its Own Email — testingcatalog · 2026-09-26
[source] Leak: OpenAI's always-on cloud assistant is named "o", due at DevDay — mark_k · 2026-09-26
OpenAI's new always-on agent reportedly codenamed "o", leaked by its own engineer — koltregaskes · 2026-09-26
[source] Leak: OpenAI's always-on agent will be called 'o', coming to all Pro tiers — Expert_Annual_19 · 2026-09-26