Claude evalとは何か — 成功基準を測る4つの実装

tweets = [
    {"text": "This movie was a total waste of time. 👎", "sentiment": "negative"},
    {"text": "The new album is 🔥! Been on repeat all day.", "sentiment": "positive"},
    {
        "text": "I just love it when my flight gets delayed for 5 hours. #bestdayever",
        "sentiment": "negative",
    },  # エッジケース: 皮肉
    {
        "text": "The movie's plot was terrible, but the acting was phenomenal.",
        "sentiment": "mixed",
    },  # エッジケース: 感情が混在
    # ... 残り996件
]
 
client = anthropic.Anthropic()
 
 
def get_completion(prompt: str):
    message = client.messages.create(
        model="claude-opus-5-5",
        max_tokens=50,
        messages=[{"role": "user", "content": prompt}],
    )
    return next(block.text for block in message.content if block.type == "text")
 
 
def evaluate_exact_match(model_output, correct_answer):
    return model_output.strip().lower() == correct_answer.lower()
 
 
outputs = [
    get_completion(
        f"Classify this as 'positive', 'negative', 'neutral', or 'mixed': {tweet['text']}"
    )
    for tweet in tweets
]
accuracy = sum(
    evaluate_exact_match(output, tweet["sentiment"])
    for output, tweet in zip(outputs, tweets)
) / len(tweets)
print(f"Sentiment Analysis Accuracy: {accuracy * 100}%")

def normalize(output):
    return output.strip().strip(".。!").lower()
 
 
normalize("Negative.")  # => "negative"

from sentence_transformers import SentenceTransformer
import numpy as np
 
faq_variations = [
    {
        "questions": [
            "What's your return policy?",
            "How can I return an item?",
            "Wut's yur retrn polcy?",
        ],
        "answer": "Our return policy allows...",
    },  # エッジケース: タイプミス
    {
        "questions": [
            "I bought something last week, and it's not really what I expected, "
            "so I was wondering if maybe I could possibly return it?",
            "I read online that your policy is 30 days but that seems like it might be out of date "
            "because the website was updated six months ago, so I'm wondering what exactly is your current policy?",
        ],
        "answer": "Our return policy allows...",
    },  # エッジケース: 長く回りくどい質問
    {
        "questions": [
            "I'm Jane's cousin, and she said you guys have great customer service. Can I return this?",
            "Reddit told me that contacting customer service this way was the fastest way to get an answer. "
            "I hope they're right! What is the return window for a jacket?",
        ],
        "answer": "Our return policy allows...",
    },  # エッジケース: 無関係な情報
    # ... 残り47件のFAQ
]
 
client = anthropic.Anthropic()
 
 
def get_completion(prompt: str):
    message = client.messages.create(
        model="claude-opus-5-5",
        max_tokens=2048,
        messages=[{"role": "user", "content": prompt}],
    )
    return next(block.text for block in message.content if block.type == "text")
 
 
def evaluate_cosine_similarity(outputs):
    model = SentenceTransformer("all-MiniLM-L6-v2")
    embeddings = model.encode(outputs)
 
    norms = np.linalg.norm(embeddings, axis=1)
    cosine_similarities = np.dot(embeddings, embeddings.T) / np.outer(norms, norms)
    return np.mean(cosine_similarities)
 
 
for faq in faq_variations:
    outputs = [get_completion(question) for question in faq["questions"]]
    similarity_score = evaluate_cosine_similarity(outputs)
    print(f"FAQ Consistency Score: {similarity_score * 100}%")

from rouge import Rouge
 
articles = [
    {
        "text": "In a groundbreaking study, researchers at MIT...",
        "summary": "MIT scientists discover a new antibiotic...",
    },
    {
        "text": "Jane Doe, a local hero, made headlines last week for saving... "
        "In city hall news, the budget... Meteorologists predict...",
        "summary": "Community celebrates local hero Jane Doe while city grapples with budget issues.",
    },  # エッジケース: 複数トピックが混在
    {
        "text": "You won't believe what this celebrity did! ... extensive charity work ...",
        "summary": "Celebrity's extensive charity work surprises fans",
    },  # エッジケース: 誤解を招く見出し
    # ... 残り197件の記事
]
 
client = anthropic.Anthropic()
 
 
def get_completion(prompt: str):
    message = client.messages.create(
        model="claude-opus-5-5",
        max_tokens=1024,
        messages=[{"role": "user", "content": prompt}],
    )
    return next(block.text for block in message.content if block.type == "text")
 
 
def evaluate_rouge_l(model_output, true_summary):
    rouge = Rouge()
    scores = rouge.get_scores(model_output, true_summary)
    return scores[0]["rouge-l"]["f"]  # ROUGE-L F1スコア
 
 
outputs = [
    get_completion(f"Summarize this article in 1-2 sentences:\n\n{article['text']}")
    for article in articles
]
relevance_scores = [
    evaluate_rouge_l(output, article["summary"])
    for output, article in zip(outputs, articles)
]
print(f"Average ROUGE-L F1 Score: {sum(relevance_scores) / len(relevance_scores)}")

inquiries = [
    {
        "text": "This is the third time you've messed up my order. I want a refund NOW!",
        "tone": "empathetic",
    },  # エッジケース: 怒っている顧客
    {
        "text": "I tried resetting my password but then my account got locked...",
        "tone": "patient",
    },  # エッジケース: 複雑な問い合わせ
    {
        "text": "I can't believe how good your product is. It's ruined all others for me!",
        "tone": "professional",
    },  # エッジケース: 褒め言葉に見える苦情
    # ... 残り97件の問い合わせ
]
 
client = anthropic.Anthropic()
 
 
def get_completion(prompt: str):
    message = client.messages.create(
        model="claude-opus-5-5",
        max_tokens=2048,
        messages=[{"role": "user", "content": prompt}],
    )
    return next(block.text for block in message.content if block.type == "text")
 
 
def evaluate_likert(model_output, target_tone):
    tone_prompt = f"""Rate this customer service response on a scale of 1-5 for being {target_tone}:
    <response>{model_output}</response>
    1: Not at all {target_tone}
    5: Perfectly {target_tone}
    Output only the number."""
 
    # 採点には生成に使ったモデルとは別のモデルを使うのが基本
    response = client.messages.create(
        model="claude-opus-5-5",
        max_tokens=50,
        messages=[{"role": "user", "content": tone_prompt}],
    )
    return int(
        next(block.text for block in response.content if block.type == "text").strip()
    )
 
 
outputs = [
    get_completion(f"Respond to this customer inquiry: {inquiry['text']}")
    for inquiry in inquiries
]
tone_scores = [
    evaluate_likert(output, inquiry["tone"])
    for output, inquiry in zip(outputs, inquiries)
]
print(f"Average Tone Score: {sum(tone_scores) / len(tone_scores)}")