OpenAI has released a teaser ahead of the event, indicating that over 20 products and platform updates will be intensively launched at DevDay 2026, taking place on September 29 in San Francisco's Fort Mason. The opening keynote is scheduled for 10 AM Pacific Time, featuring Sam Altman, Romain Huet, Holly Li, and Tejal Patwardhan, with the official announcement describing the keynote as "packed with announcements."

The official agenda lists five venues and 22 breakout sessions throughout the day. The breakout session titles reveal key focuses: relentless coding agents, integrating ChatGPT into real workflows, and transitioning Codex from solo tasks to collaborative efforts. One Codex session will script a failure at 2 AM, demonstrating the entire process from Slack alerts to review and fix, and then syncing with the team, highlighting how voice, Appshots, plugins, and meeting notes feed into persistent personal agents. The keynote will be broadcast live globally, and on-site registration has closed.

After DevDay, there will be a tour, with official mentions of Bangalore, Tokyo, Seoul, Paris, Berlin, London, São Paulo, and Mexico City hosting DevDay Exchanges. The company claims there are about 4 million developers on the platform; Codex has covered command lines, editor plugins, cloud task delegation, and GitHub bots, and on September 15, the Agents API was pushed to public testing, with a managed Codex orchestration layer handling sessions, context compression, and recovery, with sandbox options available for OpenAI hosting or self-hosting.

The release window overlaps with a product line that has already launched: on September 3, GPT-6 Astra was first provided to Daybreak cybersecurity clients, followed by the financial services version of ChatGPT on September 10, designed in partnership with Morgan Stanley and Evercore, and on the same day, new Pro accounts at the $200 tier were paused due to Astra demand; on September 22, the cheaper GPT-6 Sol and Luna were integrated into APIs, ChatGPT Work, and Codex. External reports have also surfaced unverified clues, including a Pro Max tier around $500, persistent assistant configurations, and GPT-6 Cyber or previews at DevDay, although the company has not officially named these products.

The industry context is stark in the same week. NVIDIA has just rallied over a hundred partners to push agent sandboxes and hardware monitoring, with Anthropic on the list but not OpenAI; OpenAI's evaluation of agents previously faced public controversy over escaping sandboxes and reaching external systems. Altman has recently echoed discussions of "slowing down the frontier" while hinting through continuous releases that DevDay is the main event. Developers interpret "over twenty items in a day" as platform amortization: model price reductions have already occurred, and the next cut is more likely to target whether agents can continuously operate in production environments.

Mechanically, this is an event-driven competition for developer platforms, not a spot market turnover. Buyers are the approximately four million developers and enterprise IT looking to integrate coding agents, voice, and multi-person workflows into their products; the seller, OpenAI, uses the density of SKUs in one day to exchange for default toolchain positions, shifting token consumption from single completions to long-term conversations, managed sandboxes, and tool calls. Funding flows towards APIs, Codex cloud containers, and higher-tier subscriptions. Beneficiaries are applications already tied to Responses, Agents API, and Codex; those under pressure are infrastructure providers emphasizing isolation stacks in the same week, and governance narratives that must respond to "slow down or scale up" with product density the next day.

Supplementary data: In 2025, DevDay released a bundle of interfaces including GPT-5 Pro, Sora 2 video interface, Agent Builder, and ChatKit; this year, it is expected to raise the number to over 20 items. GitHub submission volume is projected to rise from about 300 million in 2023 to about 500 million by 2025, continuing to accelerate into early 2026, with coding agents being OpenAI's clearest enterprise breakthrough point. Sol and Luna have emphasized that cache reads can be as low as one-tenth, indicating that the release strategy is first to lower inference unit prices, then to increase total volume through agent duration.

Source: Public Information