Thibault Sottiaux

Greg Brockman, co-founder and president of OpenAI, teams up with Codex engineering lead Thibault Sottiaux to discuss the evolution of AI coding. They cover how GPT-5 Codex agents can tackle complex coding tasks and the significance of building 'harnesses' for coding automation. The duo explores breakthroughs in code review and the potential transformation of software development. They also ponder the future of collaborative AI in coding, addressing concerns like security and whether learning to code remains relevant in this AI-driven landscape.

Ed Bayes, product designer on Codex at OpenAI, shapes UX for coding agents. Thibault Sottiaux, Codex engineering lead, builds agent architectures and harnesses. They discuss agentic coding systems, sandboxing and safety trade-offs, co-evolution of models and harnesses, integrations across IDEs and toolchains, multi-agent futures, and latency and performance trade-offs.

Matt Schlicht, founder of Octane AI and creator of Moldbook, talks agent-first social experiments. Alex Blania, co-founder of WorldCoin, explores internet-scale proof-of-human systems. Thibault Sottiaux, OpenAI Codex engineering lead, unveils the Codex macOS app. Christopher O'Donnell, founder of Day.ai, outlines AI-native CRM ideas. Jim Siders, CEO of SHIELD, explains AI-driven IT roll-ups. David Placek and Chris Black discuss naming and culture.

Greg Brockman, co-founder and president of OpenAI, and Thibault Sottiaux, Codex engineering lead at OpenAI, discuss the evolution of coding with AI. They dive into the journey from GPT-3 to the powerful GPT-5 Codex, exploring its capabilities in complex refactoring and coding assistance. The duo reveals insights on building AI harnesses, breakthroughs in code review, and the transformative potential of agentic coding. They also touch on the future landscape of AI in software development and the implications for learning to code in an automated world.

Thibault Sottiaux, an OpenAI Codex engineer who builds agentic coding systems, explains why removing scaffolding leads to true agent autonomy. He discusses agent-first design, simple scalable primitives over clever harnesses, open-sourcing Codex tooling, multi-agent scaling, portability trade-offs, and how agents reshape developer workflows and careers.