ART vs LangChain
ART and LangChain are both agent frameworks. ART is published by OpenPipe and LangChain by LangChain. On GitHub, LangChain has 148,371 stars and ART has 10,819. Both were last active in Oct 2026. The table lines up where they differ (publisher, license and weekly downloads) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. ART describes itself as: Open-source reinforcement learning framework that trains LLM agents on multi-step tasks using GRPO. LangChain: Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it. Licenses: ART Apache-2.0, LangChain MIT.
Updated Oct 26, 2026 · Built from catalog data; how we rank and grade
ART
OpenPipe
Open-source reinforcement learning framework that trains LLM agents on multi-step tasks using GRPO.
LangChain
LangChain
Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it.
Who should pick which
- Pick LangChain if you want a stable release (ART is marked beta).
- LangChain has the larger community: 148,371 GitHub stars against 10,819.
From listing data only. We don't pick a winner on security beyond the grades; read how grades work.
Side by side
| Fact | ART | LangChain |
|---|---|---|
| Type | Harness | Harness |
| Publisher | OpenPipe | LangChain |
| License | Apache-2.0 | MIT |
| Pricing | Not stated | Not stated |
| Runs | Not stated | Not stated |
| Auth | Not stated | Not stated |
| Hosts supported | Not stated | Not stated |
| Tools | Not listed yet | Not listed yet |
| Security grade | –Security: not graded yet | –Security: not graded yet |
| Freshness grade | AFreshness: A | AFreshness: A |
| GitHub stars | 10,819 | 148,371 |
| Weekly downloads | 2,536 | 37,334,710 |
| Last release | Oct 20, 2026 | Oct 22, 2026 |
| Last activity | Oct 22, 2026 | Oct 24, 2026 |
Facts from each listing's public sources, checked daily. Tool lists arrive with tool scans.
Install
ART
pip install openpipe-art
LangChain
pip install langchain
Also consider
- 0.853score
LlamaIndex
LlamaIndex
Open-source Python toolkit for RAG and agents over your own data, with event-driven workflows and 300+ integration packages.
HarnessAFreshness: A★ 52.6K↓ 1.4M/wk - 0.748score
LangGraph
LangChain
Low-level Python orchestration framework for long-running stateful agents, with durable execution, human review points and short- and long-term memory.
HarnessAFreshness: A★ 43.8K↓ 13.1M/wk - 0.732score
CrewAI
CrewAI
Open-source Python framework for multi-agent workflows, with role-based Crews and event-driven Flows.
HarnessAFreshness: A★ 60.1K↓ 644.6K/wk
Questions
- Is ART or LangChain more popular?
- LangChain has more GitHub stars (148,371 against 10,819). Stars measure attention, not quality, so check freshness and docs too.
- Are ART and LangChain open source?
- Yes: ART is Apache-2.0 and LangChain is MIT.
Related
Cite this page
ART vs LangChain. Agent Mart. https://agentmart.dev/compare/art-vs-langchain (last updated 2026-10-26)