A trades business receives 300 website enquiries a month. Each one is summarised and categorised by an AI model: about 1,000 tokens in and 300 tokens out. At illustrative rates of US$1 per million input tokens and US$5 per million output tokens, the AI usage comes to about US$0.75 a month — 300 × (1,000 × $1 + 300 × $5) ÷ 1,000,000.
At this volume a paid automation platform plan would usually cost more each month than the AI itself, and the build is the largest cost overall. That is common for small volumes, and it is why a quote should always show build and running costs on separate lines.
Larger models, long documents, images or several AI calls per enquiry can raise usage by orders of magnitude. Always check the current rates on your provider’s pricing page.