API-Hosted Versus Local Models
API-Hosted Versus Local Models
Fact-check status
Key jargon
| Term | Plain-language meaning |
|---|---|
| Hosted API | A remotely operated model accessed through a service interface. S1 |
| Local model | A model executed on infrastructure controlled by the user or organization. S1 |
| Egress | Data leaving a controlled environment for another system or network. S1 |
| Total cost of ownership (TCO) | Combined compute, engineering, operations, licensing, and risk cost over time. S1 |
Key concepts
- Hosted and local are deployment choices, not automatic quality or privacy guarantees. S1
- Compare measured quality, latency, operational burden, data handling, availability, and total cost for the real workload. S1
Concept map
flowchart LR
A["Define workload and data rules"] --> B["Test hosted and local candidates"]
B --> C["Measure quality latency TCO"]
C --> D["Select and monitor deployment"]Diagram semantics verified against S1 and S2 on 2026-09-02.
| Dimension | Hosted API | Local/self-hosted |
|---|---|---|
| Startup | Fast | Hardware and operations required S1 |
| Capability updates | Provider-managed | You choose and validate upgrades S1 |
| Data boundary | Leaves your runtime under contract/policy | Can remain local, but apps/logs still matter S1 |
| Scaling | Service abstraction | Capacity planning and serving stack S1 |
| Cost | Usage-based | Hardware, power, staff, idle capacity S1 |
| Control | Provider interface and policy | More deployment control, more responsibility S1 |
Decision rule
Evaluate the complete system. Running weights locally does not make a browser UI, plugin, telemetry exporter, or vector database private. S1
Exercise
Compare hosted and local options for a confidential 20-user document assistant. Include data flow, hardware, availability, update process, total cost, and deletion requirements.