smolagentsHugging Face's minimalist Python library for building code-first AI agents in a few lines

5.0 (4)

Reviewed by Daniel Nikulshyn·Updated May 2026

Open Source AI Agents Python Developer Tools Hugging Face Framework Code Execution

Overview

smolagents is an open-source agent framework from Hugging Face designed around simplicity and small surface area. Instead of orchestrating agents through verbose JSON tool calls, it lets agents express actions as Python code, which tends to be more expressive and reduces the number of LLM steps needed to complete a task. The library is model-agnostic, working with models hosted on the Hugging Face Hub, local inference servers, and major API providers like OpenAI and Anthropic. It ships with sandboxed execution options such as E2B and Docker so generated code can run safely, and it integrates with common tool ecosystems including Hub Spaces and LangChain tools. It is aimed at developers who want a transparent, hackable starting point for agent projects rather than a heavy, opinionated framework, making it well suited for prototyping, research, and lightweight production use cases.

Key features

CodeAgent that writes and executes Python to solve tasks
Support for Hugging Face, OpenAI, Anthropic, and local models
Sandboxed code execution with E2B and Docker backends
Tool integration with Hub, LangChain, and custom Python functions
Built-in ToolCallingAgent for traditional JSON-style tool use
Lightweight, minimal-dependency design

Pricing

Model: Free
Category: AI Agents Frameworks
Rating: 5.0 / 5 (4)

Use cases

Build code-first AI agents quickly

Developers can create agents that solve tasks by writing and executing Python code, reducing the number of LLM steps compared to JSON tool-calling approaches.

Run agents with any LLM provider

Prototype agents using Hugging Face Hub models, local inference servers, or APIs like OpenAI and Anthropic without changing the framework.

Safely execute generated code

Use E2B or Docker sandbox backends to run agent-generated Python in isolated environments, mitigating security risks during automated task execution.

Integrate existing tool ecosystems

Combine custom Python functions with Hub Spaces and LangChain tools to extend agent capabilities while keeping a minimal, readable codebase.

Pros & Cons

Pros

Very small, readable codebase that is easy to extend
Code-based actions reduce steps and boost agent expressiveness
Works with many LLM providers and local models
Sandboxed execution via E2B or Docker for safer code running
Free and fully open source

Cons

Requires Python knowledge to use effectively
Fewer built-in integrations than larger agent frameworks
Code execution introduces security considerations to manage
Less suited for complex multi-agent orchestration out of the box

Reviews

5.0

Average from 4 ratings.

Naomi Suzuki

Apr 15, 2026

Use it every day

Honestly didn't expect to like it this much. Tool integration with Hub, LangChain, and custom Python functions is exactly what I needed, and code-based actions reduce steps and boost agent expressiveness. I do wish requires Python knowledge to use effectively, but I reach for it almost every day now and it just clicks.

Wei Chen

Dec 18, 2025

Does the job

Pretty happy overall. Tool integration with Hub, LangChain, and custom Python functions just works and very small, readable codebase that is easy to extend. Code execution introduces security considerations to manage can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.

Jamal Carter

Nov 25, 2025

Does the job

Pretty happy overall. Sandboxed code execution with E2B and Docker backends just works and sandboxed execution via E2B or Docker for safer code running. but no dealbreakers — I'd recommend it to a friend without hesitating.

Sanjay Gupta

Jul 11, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on codeAgent that writes and executes Python to solve tasks, and code-based actions reduce steps and boost agent expressiveness caught me off guard. still, I'd recommend giving it a real trial.