Scores are a crucial part of developing and improving your LLM application or agent.

There are multiple categories of Scores:

  1. End-User Feedback - Explicit: For example a thumbs-up or down to a chatbot’s answer. This is automatically enabled when you have made a chatbot with Chainlit. Otherwise, you can use the score API in your application.
  2. End-User Feedback - Implicit: For example, user conversion to paid offering increases by 15% with new RAG version.
  3. AI Evaluation: A score generated by an online evaluation done by an AI model. You can define metrics like faithfulness, hallucination, harmfulness etc.
  4. Human Evaluation: A score given by a human developer, product owner or reviewer. You can define metrics like faithfulness, hallucination, harmfulness etc.

You can get a quick overview over the scores over time in the Dashboard.

Scores on the Literal AI Dashboard

Scores on the Literal AI Dashboard

An overview of all the scores given are

A list of scores left by users

Example of Scores collected on Literal AI

Scores are tied to a Step or a Generation. As such, they appear in their respective info panels:

A list of scores left by users on a step

Example of Scores on a Step

Create a score

From the application

The Literal AI application offers an easy way to manage scores: Score Templates.

To create a Score Template, click on “Create score” and select the “Create Template” option:

The option to create a template

Create Template option

Via Score Templates, admin users can control and expose to users the various types of evaluations allowed from the application. Score Templates come in two flavors: Categorical and Continuous.

Categorical templates let you create a set of categories, each tied to a numeric value:

Categorical template form

Create categorical Score Template

Continuous templates offer a minimum and a maximum value which users can then select from to score.

Continuous template form

Create continuous Score Template

From a Step or a Generation, admins can then score by selecting a template and filling in the required form fields.

Scores can be deleted individually from a Step or a Generation via their delete button.

By default, any admin user may create a score template. Deletion is left in the hands of project owners, from the Settings page.


The SDKs provide score creation APIs with all fields exposed. Scores must be tied either to a Step or a Generation object.

The example below highlights how you can receive human feedback on a FastAPI server by calling the create_score API in Python.
import os
from fastapi import FastAPI
from literalai import LiteralClient

literal_client = LiteralClient(api_key=os.getenv("LITERAL_API_KEY"))

app = FastAPI()"/feedback/")
def receive_human_feedback():

    # Create a score on the `Step` the user gave feedback for.
    return literal_client.api.create_score(
            comment="This was good",