5–15% of the original model's output-token price, multiplied by your domain mix. The base rate is 5%; it scales up based on trace complexity — external API calls, function-call chains, multi-turn depth, and multi-agent activity each push the rate higher, up to 15% for the richest traces. Output only — we never pay on input. The on-site estimator uses a conservative 5% baseline. Worked example at baseline: $25K/mo total spend, medical workload, 4× multiplier → $25K × 70% × 5% × 4× = $3,500/mo. Richer traces in the same batch can 2–3× that figure.