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The most important OpenAI announcement you probably missed at DevDay 2025
OpenAI's developer conference featured exciting AI advancements, but the release of Codex, their AI software engineer, was arguably the most significant announcement. Codex, now generally available, is designed to build tools, demonstrating OpenAI's strategy to dominate the enterprise market. This release includes a new SDK, Slack integration, and security controls, signifying its readiness for critical enterprise tasks. Powered by GPT-5-Codex, the AI model enables autonomous coding and offers significant productivity gains, including long-running complex task completion. OpenAI engineers use Codex daily, leading to a 70% increase in weekly code contributions, showcasing its core role. Codex is foundational for building OpenAI’s other AI products, including custom tools showcased at the conference. A key feature is its code review capability, catching hundreds of bugs daily and saving time. OpenAI prioritizes winning enterprise clients with Codex, as highlighted by CEO Sam Altman. Companies like Cisco are already benefiting from Codex, with faster code review and project timelines. The new SDK allows businesses to integrate Codex into custom workflows, creating self-evolving applications. While other announcements captured the public's attention, Codex represents a tangible shift in software development.
