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Simon Last, co-founder of Notion, walks through the company's AI journey from first touching GPT-4 at a 2022 offsite in Mexico to shipping a full personal agent in August 2025. He describes the short-term bet on a writing assistant (launched February 2023) versus the long-term vision of a general assistant that could create databases, query them, and weave tasks together. The agent took three or four attempts over several years before finally working well enough to ship.
Last explains that Notion rewrites its AI harness roughly every six months as model capabilities accelerate, and that the engineering org has shifted from humans typing code to humans designing end-to-end tasks and verifying agent output. He describes the gap between median and top engineers widening dramatically, with the design team building a Git repo called the design playground so designers can spin up high-fidelity prototypes. On the product side, Notion positions itself as model-agnostic, calling itself the Switzerland for models, and has redesigned its APIs around a markdown dialect and SQLite so agents can interact naturally with pages and databases.
The episode closes with Last describing his personal workflow: he hasn't written code since last summer, runs coding agents overnight (personal record of 13 days straight), and uses custom agents for email triage and routing internal bug reports. The fundamental shift, he says, is from building a tool for humans to do work to building a tool for humans to manage agents doing the work.
GPT-4 Discovery at Mexico Offsitestory
Simon Last and co-founder Ivan got early access to GPT-4 at a 2022 company offsite in Mexico. Two things were immediately clear: the model was smart enough to follow complicated instructions, and its world knowledge was extremely deep and broad.
Rewrite the Harness Every Six Monthsstrategy
Notion rewrites its AI harness roughly every six months as model progress accelerates. Last says many companies get this wrong by sticking with one approach instead of redesigning deeply around the current state of the technology.
The 1000x Engineer Gap Widensinsight
Last says the gap between median and top engineers has grown dramatically with AI tools. The minimum bar hasn't changed, but the maximum is extremely increased. Internally, things feel more chaotic with more prototypes and more ambitious PRs.
Three or Four Failed Agent Attemptsstory
Notion tried to build a general agent three or four times over several years before finally launching the personal agent in August or September 2025. Each attempt sort of worked but wasn't useful enough, largely because the models were too early.
Coding Agents as the Kernel of AGIinsight
Last argues that AGI will be a coding agent, and that code is a primitive for representing deterministic logic. The exciting implication for a knowledge-work agent is that it can bootstrap its own capabilities, like building an integration that doesn't exist yet.
Notion as Switzerland for Modelsstrategy
Notion positions itself as model-agnostic, letting customers easily access and switch between the best models at any time. Last notes that four different Chinese open-source models are now quite good and much cheaper than frontier models.
13 Days of Continuous Agent Workstory
Last's personal record is a coding agent running for 13 days straight without stopping. His goal each night is to give the agent enough work that it won't be done by morning, which he calls victory.
From Tool for Humans to Agent Managerinsight
Last describes the fundamental shift: before AI, Notion's goal was the best tool for humans to directly perform work. Now it's the best tool for humans to manage agents doing the work. The same primitives (documents, databases) are still needed, plus new ones for representing agents.
Notion isn’t designing AI agents that just use tools. Their agents can autonomously build their own integrations, as well as write the code needed to finish a task. Sarah Guo sits down with Notion Co-Founder Simon Last to explore Notion’s rapid evolution from a simple writing assistant to a sophisticated platform for custom AI agents. Simon discusses the technical hurdles of indexing disparate data from sources like Slack and Google Drive, as well as the internal shift toward using coding agents to build Notion itself. Plus, Simon elaborates on what he sees as a fundamental transition in productivity: moving from a tool where humans do the work, to one where humans manage a swarm of agents. Sign up for new podcasts every week. Email feedback to [email protected] Follow us on Twitter: @NoPriorsPod | @Saranormous | @EladGil | @simonlast | @NotionHQ Chapters: 00:00 – Cold Open 00:05 – Simon Last Introduction 00:26 – Genesis of Notion AI 04:10 – Challenge of Semantic Indexing and Retrieval 07:16 – The Six-Month Rewrite Cycle 08:12 – Notion’s Coding Agent Era 09:44 – Impact on Team Dynamics 12:49 – Launching Custom Agents 15:39 – Notion as the ‘Switzerland’ for Models 17:33 – Designing APIs for Agent Customers 20:09 – Simon’s Personal Agentic Workflows 24:48 – Notion: Tool for Work is Now A Tool for Agents 27:28 – How Building Has Changed for Simon 29:00 – Conclusion
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