OpenAI packs 20-plus DevDay 2026 announcements spanning GPT-6 Astra, ChatGPT, Codex, APIs, security, and builder tools

OpenAI announced more than 20 items at DevDay 2026. Compared with single-point releases, this presents multiple announcements together in one event. Based on the recap phrase "more than 20 announcements"; no details for individual items are provided.

The announcements cover areas including GPT-6 Astra, ChatGPT, Codex, APIs, security, and new tools for builders. Brings models, products, developer interfaces, security, and tools together in one event. Based on the keywords listed in the summary; no specific features, parameters, or performance data are given.

The content is aimed at builders. Highlights developers as the target audience for these announcements. Based on the phrase "new tools for builders"; the specific form of those tools is not described.

This material is an event recap summary, suited to quickly understanding the thematic scope and coverage of DevDay 2026 announcements; it is most useful for readers who want to know what was released and which product lines were involved.

The summary does not list the specific content, release timing, availability, or technical metrics of each announcement, so the actual capabilities and applicable conditions of the GPT-6 Astra, Codex, API, and security-related updates cannot be judged; these details await more complete material.