Updated April 2026 20 min read For developers and advanced users

Guide Claude AI the complete
Models, Transformers, Inference API & Spaces

Everything you need to know about HuggingFace — the open-source AI platform — its models, the Transformers library step by step, the free Inference API, and how to build AI apps.

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What is HuggingFace?

HuggingFace is the world's leading platform for open-source AI — the "GitHub of AI". It hosts over 500,000 models, 150,000 Datasets and tools for building AI applications.

Quick start

Install the Transformers library and start using models within minutes:

# installation
pip install transformers torch

# basic usage — a question-answering model
from transformers import pipeline

qa = pipeline("question-answering", model="deepset/roberta-base-squad2")
result = qa(question="What is the capital of Israel?",
            context="Israel is a country in the Middle East. Its capital is Jerusalem.")
print(result["answer"])  # Jerusalem
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A free Inference API

You can call models through HuggingFace's API for free without a GPU. Perfect for prototyping and small projects.

Key capabilities

HuggingFace covers all the areas of modern AI:

# Inference API — a basic REST call
import requests

API_URL = "https://api-inference.huggingface.co/models/mistralai/Mistral-7B-Instruct-v0.1"
headers = {"Authorization": "Bearer hf_YOUR_TOKEN"}

def query(payload):
    response = requests.post(API_URL, headers=headers, json=payload)
    return response.json()

output = query({"inputs": "Explain what Machine Learning is"})
print(output[0]["generated_text"])

Practical uses

Quick tips

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Ready to start?

Sign up to HuggingFace for free and access hundreds of thousands of ready-to-use AI models.