Agent Lightning vs ART
Side-by-side comparison of two AI agent tools
A
Agent Lightningopen-source
The absolute trainer to light up AI agents.
A
ARTopen-source
Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.6,
Metrics
| Agent Lightning | ART | |
|---|---|---|
| Stars | 18.5k | 10.8k |
| Star velocity /mo | 1.5k | 898.6666666666666 |
| Commits (90d) | 56 | 208 |
| Releases (6m) | 3 | 1 |
| Overall score | 0.6873154649928275 | 0.6738426380820626 |
FAQ
- Which is more popular, Agent Lightning or ART?
- Agent Lightning has more GitHub stars (18,539 vs 10,784).
- Which is more actively developed, Agent Lightning or ART?
- ART had more commits in the last 90 days (208 vs 56).
- Should I use Agent Lightning or ART?
- Compare their capabilities, limitations and "best for" notes above. Both are open source, so trying each on a small task is the fastest way to decide.