rubric 1.1.4

rubric

Rubrics

A Python library for LLM-based evaluation using weighted rubrics.

Installation

uv add rubric

Usage

import asyncio
import os
from openai import AsyncOpenAI
from rubric import Rubric
from autograders.per_criterion_grader import PerCriterionGrader

async def generate_with_async_openai(system_prompt: str, user_prompt: str) -> str:
    client = AsyncOpenAI(api_key=os.getenv("OPENAI_API_KEY"))
    response = await client.chat.completions.create(
        model="gpt-4o-mini",
        messages=[
            {"role": "system", "content": system_prompt},
            {"role": "user", "content": user_prompt},
        ],
        max_tokens=400,
        temperature=0.0,
    )
    return response.choices[0].message.content or ""

async def main():
    rubric = Rubric.from_dict([
        {"weight": 1.0, "requirement": "Output includes a clear introduction"},
        {"weight": 2.0, "requirement": "Analysis is supported by specific examples"},
        {"weight": -1.0, "requirement": "Contains factual errors"}
    ])

    grader = PerCriterionGrader(generate_fn=generate_with_async_openai)
    
    result = await rubric.grade(
        to_grade="Your text to evaluate...",
        autograder=grader
    )

    print(f"Score: {result.score}/100")
    for criterion in result.report:
        print(f"  {criterion.verdict}: {criterion.requirement}")

asyncio.run(main())

Autograder Strategies

• PerCriterionGrader - Evaluates each criterion in parallel LLM calls
• PerCriterionOneShotGrader - Evaluates all criteria in a single LLM call
• RubricAsJudgeGrader - Holistic evaluation, LLM returns final score directly

Customization

You can customize grading at multiple levels:

1. Custom generate_fn (most common) Pass any function that takes (system_prompt, user_prompt) and returns a string. Use any LLM provider (OpenAI, Anthropic, local models, etc.):

grader = PerCriterionGrader(generate_fn=your_custom_function)

2. Override specific methods Subclass any autograder and override:

• judge() - How rubric criteria are evaluated against the text
• generate() - How prompts are constructed and LLM is called, typically calls the generate_fn
• aggregation() - How individual criterion scores are combined

3. Full control Override the entire grade() method for complete end-to-end control over the grading process.

Loading Rubrics

rubric = Rubric.from_dict([...])
rubric = Rubric.from_json('{"criteria": [...]}')
rubric = Rubric.from_yaml('...')
rubric = Rubric.from_file('rubric.yaml')

Requirements

• Python 3.13+
• An LLM API (e.g., OpenAI, OpenRouter) - set appropriate API keys as environment variables

License

MIT License - see LICENSE file for details.