Costs and limitations of AI Agents (on cloud n8n)

Questions
1

Cloud pricing is based on “workflow executions” (eg. 2,5K executions in the Starter plan). I guess every time you run a workflow that includes an AI agent counts as 1 execution, but not sure if there are some limits.

For example, can I have a workflow with an agent that does 1000 actions (for example check 1000 emails and summarize each of them in a Google Sheet), or a workflow with 20 different agents doing a lot of stuff for an hour, and still it will count as only 1 workflow execution?

Are there other limitations or “hidden costs” regarding AI agents or AI nodes that I should take into account? (apart from having to pay for the tokens to the AI API/provider)

2

Yes, you’re correct - one workflow run = one execution, regardless of how many agent actions or nodes inside. Your 1000-email scenario would count as 1 execution. Same with 20 agents running for an hour in one workflow.

The real limit to watch is concurrency (Starter plan = 5 workflows running simultaneously). If you trigger the same workflow frequently (like a chatbot), those add up fast since each trigger = new execution.

Only “hidden cost” beyond API tokens is if you exceed your monthly execution quota - workflows may pause until next billing cycle