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Understand the trade-offs — when customization makes sense and when prompting is sufficient
| Dimension | Prompt Engineering | Fine-Tuning |
|---|---|---|
| Setup time | Minutes | Hours to days |
| Cost | Per-token | Training + hosting |
| Flexibility | Change instantly | Requires re-training |
| Knowledge cutoff | Can't add new facts | Can't add new facts |
| Consistency | Variable | Very consistent |