Real Cost of Custom Agentic AI: Dev is Just the Tip of the Iceberg

Early_Protection6814 · reddit · 2026-08-19

A detailed breakdown of building custom agentic AI systems. Dev costs: Simple RAG ($10K–$30K), task-execution agents ($70K–$150K), enterprise platforms ($150K–$500K+). Ongoing costs: Cloud hosting ($200–$5K/mo), LLM API usage (can exceed $15K/mo for heavy workloads), and integrations. Maintenance: Typically 15–30% of build cost annually. The key takeaway: initial development is only 25–35% of the 3-year total cost (e.g., an $80K build becomes $230K–$320K over 3 years).

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