Lenny Rachitsky@lennysan8h ago

"Are you mainlining it yet?" This is one of the key internal memes at @OpenAI, and a big part of the reason there's been a vibe shift toward Codex over the past few months. It asks: are you using the product all day, every day? Are you depending on it? Are you bringing all your taste to bear on whether this is something people actually want? Tara Seshan (@tarstarr) leads product for Codex and ChatGPT work at OpenAI (alongside her EM @ajambrosino). When I asked her what changed internally to shift the vibes toward Codex, her answer was: nothing. People just started noticing. In our conversation, we also discuss: 🔸 Her rule for building on top of frontier models: build for where they'll be in 2-3 months—building for today fails, building for a year out fails 🔸 Why PMs are now in the business of elevating everyone's ambition 🔸 Why the future of knowledge work is steering, not rowing 🔸 Why OpenAI is "founders-led," not founder-led (and why there's no secret strategy room) 🔸 The one type of writing she will never let AI touch Listen now 👇 https://youtu.be/zMvBMfj4cSQ