The time and effectiveness of a marketing team

An in-house B2B marketing team was carrying twelve people across LinkedIn, email, blog, SEO, and sales outreach. I built a coordinated AI system that sized each task to the smallest model that could do it (Haiku for high-frequency work, Sonnet for the judgment calls), behind a deterministic harness that handled sequencing and formatting so the models only did what actually needed a model. Custom MCP connectors wired it into the real stack (Apollo, HubSpot, a custom Outlook connector), with sales staff reviewing every outbound message. The team went from twelve to 2.5 FTE at roughly $33 a month in model spend.