Comparing AI Cost Against Human Cost
The comparison is useful, but only if it is honest about what each column contains. The Parix.ai cost comparison makes both sides explicit.
What Belongs in the Human Column
Fully loaded hourly cost, roughly 1.25 to 1.4 times salary. Time per task multiplied by volume. Error rate and rework. Training and ramp-up time.
What Belongs in the AI Column
Build cost, paid once. Model usage, paid monthly and scaling with volume. Maintenance, because integrations break when connected systems change. And human review time — the one that is always left out.
The Honest Framing
This is rarely a replacement decision.
In practice AI handles the routine share and a person handles the rest, so the real comparison is not “AI or human” but “what proportion needs a human, and what does the remainder cost?”
If one case in ten still needs review, that is a staffing cost, not a rounding error — and comparisons that assume zero human involvement are the reason projected savings so often fail to appear.
Who Uses It
Teams building a business case that has to survive scrutiny. For the process-level view use the Manual vs Automated Cost Comparison, price the model usage with the LLM Token Cost Calculator, and get the payback period from the Automation ROI Calculator.