The MetaGPT repository provides a multi-agent framework for natural language programming and software development.
Open source
24 alternativesLagent
Lagent provides a lightweight framework for building agents powered by large language models.
About Lagent
Lagent is an open-source, lightweight Python framework for building agents powered by large language models, maintained by InternLM and hosted on GitHub. It uses a PyTorch-inspired layer-based design that lets users define agent workflows by creating layers and specifying message passing between them in a Pythonic way. The framework includes built-in utilities for agent session memory management, custom LLM input message aggregation, and standardized agent message communication schemas. It supports integration with LLM models such as those run via VllmModel, and provides example code for building multi-agent applications.
Key features
- Lightweight open-source Python framework for LLM agent development
- PyTorch-inspired layer-based workflow for defining agent logic
- Built-in agent session memory management with reset functionality
- Custom message aggregation for adjusting LLM input formatting
- Standardized AgentMessage schema for agent communication
- Supports integration with LLM models like VllmModel
Best for: Developers building lightweight, customizable LLM-powered agent applications in Python.
Good for
- Open-source, free to use and modify
- Pythonic layer-based design simplifies agent workflow creation
- Includes built-in memory and message aggregation utilities to reduce boilerplate
Lagent at a glance
- Website
- github.com/InternLM/lagent
- Category
- AI & Machine Learning › AI Agent Frameworks
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Lagent alternatives
Tools and sites you could use instead, ranked by how closely they match.
The MetaGPT repository presents a multi-agent framework for natural language programming.
Open source
24 alternatives
ConnectOnion provides command line tools for building and running AI agents.
Open source
24 alternatives
mempalace offers an open-source memory system designed for use with AI agents.
Open source
24 alternatives
AutoGen provides a programming framework for developing agentic AI systems.
OpenAGI provides a package for creating agents that combine language models and domain expertise.
Open source
24 alternativesPopular in AI Agent Frameworks
Well-known listings from the same topic.
Uplizd Unicornunicorn.uplizd.aiWebagentforge.netAbility AIability.aiHaystackhaystack.deepset.aiLangChainlangchain.comPromptShuttlepromptshuttle.com
Lagent FAQ
How do you install Lagent?
Install from source by cloning the GitHub repository and running pip install -e . in the project directory.
How does Lagent manage agent session memory?
Input and output messages are automatically added to session memory, which can be inspected or reset via the agent's reset method.
Can message aggregation be customized in Lagent?
Yes, users can extend the DefaultAggregator class to implement custom aggregation for LLM input formatting.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.