Lenny's Podcast: Product | Career | Growth

Why humans are AI’s biggest bottleneck (and what’s coming in 2026) | Alexander Embiricos (OpenAI Codex Product Lead)

December 14, 2025·1h 25m·6-min readinterviewtechnology
Podzilla Summary (6 min)
TLDR
Codex, OpenAI's coding agent, is evolving from a code-completion tool into a proactive software engineering teammate capable of planning, validating, and maintaining code — with early signs of self-managing its own training infrastructure. The key to its acceleration lies not just in mode

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Guest

A

Alexander Embirikos

interview on Lenny's Podcast: Product | Career | Growth

Mentions

Books, people, and resources mentioned in this episode.

People

Alexander EmbirikosLenny RachitskyAndrej Karpathy

Companies

OpenAIDropbox

Products & Tools

CodexSoraAtlasVS CodeGPT-5

Topics

Artificial IntelligenceFuture Of WorkLarge Language ModelsMachine LearningProduct ManagementSoftware EngineeringTech Industry

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