# Stock Feedback Functions

## Classification-based

### 🤗 HuggingFace

API Reference: [HuggingFace](/content/reference/trulens/providers/huggingface/#trulens.providers.huggingface.Huggingface).

### OpenAI

API Reference: [OpenAI](/content/reference/trulens/providers/openai/#trulens.providers.openai.OpenAI).

## Generation-based

### LLMProvider

API Reference: [LLMProvider](/content/reference/trulens/feedback/#trulens.feedback.LLMProvider).

## Embedding-based

### Embeddings

API Reference: [Embeddings](/content/reference/trulens/feedback/embeddings/#trulens.feedback.embeddings).

## Combinations

### Ground Truth Agreement

API Reference: [GroundTruthAgreement](/content/reference/trulens/feedback/groundtruth/#trulens.feedback.groundtruth)