Lagent
Lightweight PyTorch-inspired framework from InternLM for building LLM-based agents.
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About Lagent
Lagent is listed in our frameworks category and is aimed at builders. Lightweight PyTorch-inspired framework from InternLM for building LLM-based agents. Pricing, as the maker states it: Open source. Maturity: Active. We last checked the official link on 2026-10-18.
Lagent at a glance
- Category: Frameworks
- Built for: Developers and teams building with AI agents
- Pricing: Open source (as the maker states it)
- Licence: Apache License 2.0 (OSI-approved open source)
- GitHub: InternLM/lagent · 2,286 stars (as of Oct 21, 2026)
- Latest release: agentrl_rc0, May 19, 2026
- Last commit: Apr 20, 2026
- Official site: github.com/InternLM/lagent
- Listed on AgentScout: Oct 18, 2026
Lagent FAQ
What is Lagent?
Lightweight PyTorch-inspired framework from InternLM for building LLM-based agents.
How much does Lagent cost?
Lagent's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is Lagent open source?
Yes. Lagent's GitHub repository is published under the Apache License 2.0, according to the licence file in the repo.
Where can I find Lagent's source code?
On GitHub at InternLM/lagent, which had 2,286 stars as of Oct 21, 2026. The latest release is agentrl_rc0 (May 19, 2026).
What are alternatives to Lagent?
Similar tools include Haystack, VoltAgent, Upsonic, Lyzr, AgentScope Java and AReaL.
Facts from our link-checked listing, the GitHub repository and the official site. See something wrong? Suggest an edit.
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Lagent alternatives
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AgentScope Java
Java version of AgentScope for building distributed, long-running agents.
AReaL
Reinforcement learning system for training LLM-based agents.
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