Each plan includes a monthly AI allowance for AI-powered features. When you use features like Intent Recognition, Knowledge Agents, Content Generation, or SupportBuddy suggestions, the actual AI cost is deducted from your allowance. If you exceed it, additional usage is billed at cost. Basic flow nodes (Prompt, Decision, Condition) don't use AI at all. The Free tier includes a one-time $1 allowance after adding a card.