# Closed-FT vs Self-Hosted FT Decision Matrix: TCO + Latency + Data Residency + KVKK

> Source: https://sukruyusufkaya.com/en/learn/fine-tuning-cookbook/ftc-closed-vs-self-hosted-decision-matrix
> Updated: 2026-05-14T14:43:00.778Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XIV — Closed-Source API Fine-Tuning
**TLDR:** Cookbook's Part XIV summary decision: closed API FT vs self-hosted open FT. 6-dim comparison: TCO (1-yr estimate), latency (P50/P95), data residency (TR/EU/US), KVKK compliance, model freedom (versioning, license, deploy), quality. Typical decisions for 4 use-cases.