How OpenAI Built Its Coding Agent

OpenAI’s Codex has already shipped hundreds of thousands of pull requests in its first month. But what is it really, and how will coding agents change the future of software?In this episode, General Partner Anjney Midha goes behind the scenes with one of Codex’s product leads- Alexander Embiricos - to unpack its origin story, why its PR success rate is so high, the safety challenges of autonomous agents, and what this all means for developers, students, and the future of coding. Timecodes:0:00 Intro: The Vision for AI Agents1:25 Codex’s Origin and Naming3:20 Early Prototypes and Agent Form Factors6:00 Cloud Agents: Safety and Security9:40 Prompt Injection and Attack Vectors12:00 PR Merging: Metrics and Transparency17:00 The Future of Code Review and Automation20:00 User Adoption: Internal vs. External Surprises22:00 Multi-Turn Interactions and Product Learnings29:30 Best-of-N, Slot Machine Analogy, and Creativity33:00 Human Taste, Iteration, and Collaboration40:00 AI’s Impact on Software Engineering Careers45:00 Education, CS Degrees, and AI Integration49:00 Prototyping, Hackathons, and Speed to Magic55:00 Legacy Code, Modernization, and Global Adoption1:00:00 Enterprise, Security, and Air-Gapped Environments1:05:00 Product Roadmap and Future of Codex1:10:00 Advice for Founders and Startups1:15:00 Education Reform and Project-Based Learning1:20:00 Hiring, Building, and New Grad Advice Resources: Find Alex on X: https://x.com/embiricoFind Anjney on X: https://twitter.com/AnjneyMidha Stay Updated: If you enjoyed this episode, be sure to like, subscribe, and share with your friends!Find a16z on X: https://x.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zListen to the a16z Podcast on Spotify: https://open.spotify.com/show/5bC65RDvs3oxnLyqqvkUYXListen to the a16z Podcast on Apple Podcasts: https://podcasts.apple.com/us/podcast/a16z-podcast/id842818711Follow our host: https://x.com/eriktorenbergPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

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