| Dimension | Jev | JSON Mode |
|---|---|---|
| Goal | Bounded typed decisions | Valid JSON schema |
| Text generation | No free-form text | Still generates tokens |
| Probabilities | Returns candidate distribution | Usually no business probability |
| Best for | Routing, scoring, review and gates | Extraction, tool parameters and structured replies |
When to choose Jev
Choose Jev when the answer must come from known candidates and code needs confidence to decide whether to act, confirm or escalate.
When to choose JSON Mode
Choose Structured Output when you need a richer object, many extracted fields, tool arguments or an explanation alongside the result.
They can work together
Let Jev route and gate the workflow, then let a standard LLM write the reply or generate code.
Remember: Valid structure does not prove that the business decision is correct. Both paths need your own data and failure cases.