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litellm/tests
Cesar GarciaandGitHub 4e417f9ef1 feat(gemini): add opt-in support for responseJsonSchema (#18147)
* feat(gemini): add opt-in support for responseJsonSchema

Add support for Gemini's native responseJsonSchema parameter which uses
standard JSON Schema format instead of OpenAPI-style responseSchema.

Benefits of responseJsonSchema (Gemini 2.0+ only):
- Standard JSON Schema format (lowercase types)
- Supports additionalProperties for stricter validation
- Better compatibility with Pydantic's model_json_schema()
- No propertyOrdering required

Usage:
```python
response_format={
    "type": "json_schema",
    "json_schema": {"schema": {...}},
    "use_json_schema": True  # opt-in
}
```

This is backwards compatible - existing code continues to use
responseSchema by default.

Closes #16340

* docs: add documentation for use_json_schema parameter

Document the new use_json_schema option for Gemini 2.0+ models
in the JSON Mode documentation.

* refactor(gemini): use responseJsonSchema by default for Gemini 2.0+

Remove opt-in flag `use_json_schema` and automatically detect model version:
- Gemini 2.0+: uses responseJsonSchema (standard JSON Schema, supports additionalProperties)
- Gemini 1.5: uses responseSchema (OpenAPI format, legacy)

This follows LiteLLM's philosophy of abstracting provider differences -
users write the same code regardless of model version.
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In total litellm runs 1000+ tests

[02/20/2025] Update:

To make it easier to contribute and map what behavior is tested,

we've started mapping the litellm directory in tests/test_litellm

This folder can only run mock tests.