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Yomi API / Documentation / Embeddings and moderation

API reference

Embeddings and moderation

This article covers two endpoints. Embeddings converts text into semantic vectors for semantic search and RAG applications. Moderations detects policy-violating content in text for content safety.

Embeddings

Embeddings maps text to numeric vectors. Distances between vectors reflect semantic similarity, enabling text retrieval and matching by meaning.

Supported models

  • Capability note: The platform provides /v1/embeddings. See the Model Catalog (Models in the console) for available embedding models.

Endpoint and parameters

POST https://api.yomiapi.com/v1/embeddings
ParameterTypeRequiredDescription
modelstringYesModel ID (use an available embedding model from the Model Catalog)
inputstring / arrayYesText to embed; arrays support batch input
dimensionsintegerNoOutput vector dimensions; supported by some models only
encoding_formatstringNofloat or base64

Code examples

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.yomiapi.com/v1"
)
# Single text
response = client.embeddings.create(
    model="YOUR_AVAILABLE_EMBEDDING_MODEL_ID",
    input="The food at this restaurant is excellent and the service is attentive"
)
print(len(response.data[0].embedding))

# Batch text
batch = client.embeddings.create(
    model="YOUR_AVAILABLE_EMBEDDING_MODEL_ID",
    input=["Semantic search", "Vector database", "Retrieval-augmented generation"]
)
print(len(batch.data))

Applications

  • Semantic search: Match documents by meaning rather than keywords.
  • RAG systems: Retrieve knowledge-base content to improve model answers and reduce hallucinations.
  • Clustering and classification: Group or label text data.
  • Recommendation systems: Recommend similar content based on previous behavior.
Do not mix vectors from different models. The retrieval collection and queries must use the same embedding model. Switching models requires re-embedding all existing text.

Moderations

Moderations checks text for content such as violence, sexual content, hate speech, harassment and self-harm. It is compatible with the OpenAI Moderation format. Results include an overall decision and confidence scores for each category, so you can choose thresholds for your application.

Endpoint address

POST https://api.yomiapi.com/v1/moderations

Code examples

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.yomiapi.com/v1"
)
response = client.moderations.create(
    input="Text to check"
)
result = response.results[0]
print("Flagged:", result.flagged)
if result.flagged:
    print("Categories:", result.categories)
    print("Confidence:", result.category_scores)

Response fields

  • flagged(boolean): Whether the content is flagged.
  • categories(object): A true/false decision for each category.
  • category_scores(object): Confidence scores for each category, from 0.0 to 1.0.

Applications

  • UGC filtering: Automatically filter comments, posts and other user-generated content.
  • AI output monitoring: Ensure generated content follows safety requirements.
  • Realtime chat moderation: Check chat rooms and support conversations in real time.

Recommendations

  • Prefer batches: Embeddings accepts arrays. Batch processing is more efficient than separate requests.
  • Tune thresholds: Set custom moderation thresholds based on category_scores rather than relying only on flagged, balancing false positives against missed detections.