Smolagents AI AgentHugging Face's lightweight Python framework for building AI agents with minimal code.

4.3 (4)

Reviewed by Daniel Nikulshyn·Updated July 2026

Open Source Python AI Agents Developer Tools Hugging Face LLM Framework

Overview

Smolagents is an open-source library from Hugging Face designed to make AI agent development simple and approachable. With just a few lines of Python, developers can create agents that reason, call tools, and execute code to solve multi-step tasks. The framework emphasizes minimalism and transparency, letting agents write and run code as their primary action format. It integrates with models from the Hugging Face Hub, OpenAI, Anthropic, and other providers, and supports custom tools, sandboxed execution, and shared agent components from the community. Smolagents is well-suited for developers, researchers, and hobbyists who want a flexible, hackable alternative to heavier agent frameworks without sacrificing capability.

Key features

Minimal Python API for agent creation
CodeAgent and ToolCallingAgent classes
Support for multiple LLM backends
Custom and shareable tools via the Hub
Sandboxed code execution options
Multi-step reasoning and tool use

Pricing

Model: Free
Category: AI Agents Frameworks
Rating: 4.3 / 5 (4)

Use cases

Build Custom AI Agents with Minimal Code

Developers can create reasoning agents that call tools and execute code in just a few lines of Python, ideal for rapid prototyping of agentic workflows.

Multi-Step Task Automation

Use CodeAgent to break down complex tasks into reasoning steps, executing code and chaining tool calls to solve problems autonomously.

Research and Experimentation

Researchers can hack on a small, transparent codebase to experiment with agent architectures, swap LLM backends, and test new tool-use strategies.

Share and Reuse Community Tools

Leverage Hugging Face Hub integration to publish custom tools or pull in shared agent components, accelerating development through community resources.

Pros & Cons

Pros

Very small, readable codebase
Works with many LLM providers
Code-based agent actions for flexibility
Strong Hugging Face Hub integration
Open source and free to use

Cons

Requires Python and coding knowledge
Less feature-rich than larger frameworks
Limited built-in UI or no-code options
Code execution needs careful sandboxing

Reviews

4.3

Average from 4 ratings.

Carlos Mendoza

Jan 30, 2026

Years in this space

I've evaluated a lot of these over the years. What stands out here is sandboxed code execution options — handled better than most — and strong Hugging Face Hub integration. Code execution needs careful sandboxing is my one real gripe. Worth the time if this is your use case.

Omar Haddad

Dec 21, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on multi-step reasoning and tool use, and works with many LLM providers caught me off guard. Code execution needs careful sandboxing is why this isn't a perfect score, still, I'd recommend giving it a real trial.

Diego Fernández

Nov 11, 2025

Does the job

Pretty happy overall. Custom and shareable tools via the Hub just works and works with many LLM providers. Limited built-in UI or no-code options can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.

Beatriz Costa

Sep 26, 2025

Does the job

Pretty happy overall. CodeAgent and ToolCallingAgent classes just works and code-based agent actions for flexibility. Limited built-in UI or no-code options can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.