What we learned during the Custom Agents beta

Summary

Notion’s Custom Agents launched in beta in February, and more than one million agents were created in two months before the feature moved out of beta. The post reports that teams scaled fastest when they treated agents as internal products, iterated with workflow experts, and shared operational knowledge rather than relying on engineers alone. Teams also redesigned end-to-end processes, such as Braintrust’s agent that scans competitor updates and Gong transcripts, updates a Notion sales one-pager, and flags relevant launches. Usage costs fell by up to 50%, partly through lighter models including Haiku 4.5 and GPT-5.4 Mini, which use up to 10× fewer credits, while new limits, dashboards, alerts, and pause controls support administration. From May 4, usage-based pricing applies through Notion credits at $10 per 1,000 credits for Business and Enterprise plans.

Takeaways

1. 1

   Teams that scaled fastest started with people who understood the workflow, iterated against success criteria, and shared what they learned across agents.

2. 2

   Custom Agents were used to redesign recurring workflows, including Braintrust’s process for monitoring competitor updates and Gong transcripts, updating a sales one-pager, and flagging relevant launches.

3. 3

   Custom Agents became up to 50% cheaper to run; Haiku 4.5 and GPT-5.4 Mini use up to 10× fewer credits, and pricing is $10 per 1,000 monthly credits.