Skip to content

ART

AI Agents & Assistants

Agent Reinforcement Trainer: train multi-step agents for real-world tasks using GRPO. Give your agents on-the-job training. Reinforcement learning for Qwen3.5, GPT-OSS, Llama, and more!

Track releases GitHub Website
Python Latest v0.5.17 · 2mo ago Security brief →

Features

  • Serverless reinforcement‑learning training service (W&B Training)
  • Open‑source RL framework for improving agent reliability with GRPO
  • Ergonomic Python harness to integrate LLMs into any application

Security Response History

1 CVE
CVE Severity Disclosed Patched (this tool) vs Ecosystem Median
CVE-2026-42208 KEV critical
CVSS 9.8
 2026-05-08 Unpatched Unpatched

Recent releases

View all 58 releases →
v0.5.17 Breaking risk
⚠ Upgrade required
  • vLLM upgraded to 0.17.0
  • unsloth and unsloth zoo downgraded
  • pyarrow added to Tinker extra
Breaking changes
  • Removed beta KL divergence from training loss
Notable features
  • W&B run config API
  • Tenant-scoped Tinker model aliases
  • Improved metrics in ART
Full changelog

Release Highlights

What's Changed

  • feat: Add W&B run config API (#615)
  • feat: add tenant-scoped Tinker model aliases (#614)
  • feat: Update Tinker renderers (#613)
  • feat: Update Tinker renderers (#612)
  • fix: Add pyarrow to Tinker extra (#611)
  • build: Upgrade vLLM to 0.17.0 (#610)
  • feat: Improved metrics in ART (#609)
  • ci: Auto-build and upload uv cache on miss (#608)
  • Remove beta KL divergence from training loss (#607)
  • Fix ty type checker errors and warnings (#606)
  • Clean up unused adapters before saving checkpoint (#605)
  • build: Upgrade to unsloth 2026.3.3 (#604)
  • Release v0.5.16 (#603)
  • build: Downgrade unsloth and unsloth zoo (#602)

Full Changelog: https://github.com/OpenPipe/ART/compare/v0.5.16...v0.5.17

View release on GitHub
v0.5.16 Breaking risk
Notable features
  • Serverless SFT training now records provenance on completion
Full changelog

Release Highlights

What's Changed

  • build: Downgrade unsloth and unsloth zoo (#602)
  • Release v0.5.15 (#599)
  • ci: Use hatch build in release workflow (#598)
  • Release v0.5.14 (#597)
  • Temporarily downgrade transformers (#596)
  • ci: Add package install smoke test workflow (#595)
  • Release v0.5.13 (#593)
  • fix: Use uv build in release workflow (#592)
  • Record serverless SFT provenance on training completion (#590)

Full Changelog: https://github.com/OpenPipe/ART/compare/v0.5.15...v0.5.16

View release on GitHub
v0.5.15 Breaking risk
Notable features
  • Record serverless SFT provenance on training completion
Full changelog

Release Highlights

What's Changed

  • ci: Use hatch build in release workflow (#598)
  • Temporarily downgrade transformers (#596)
  • ci: Add package install smoke test workflow (#595)
  • fix: Use uv build in release workflow (#592)
  • Record serverless SFT provenance on training completion (#590)

Full Changelog: https://github.com/OpenPipe/ART/compare/v0.5.14...v0.5.15

View release on GitHub
v0.5.14 Breaking risk

Minor fixes and improvements.

Full changelog

Release Highlights

What's Changed

  • Temporarily downgrade transformers (#596)
  • ci: Add package install smoke test workflow (#595)
  • Release v0.5.13 (#593)
  • fix: Use uv build in release workflow (#592)

Full Changelog: https://github.com/OpenPipe/ART/compare/v0.5.13...v0.5.14

View release on GitHub
v0.5.13 Breaking risk
Notable features
  • Transformers v5.x update
  • MoE LoRA conversion
  • Flex Attention for Megatron
View release on GitHub

Weekly OSS security release digest.

The CVE patches and breaking changes that affected production tools this week. One email, every Sunday.

No spam, unsubscribe anytime.

About

Stars
9,879
Forks
877
Languages
Python Jupyter Notebook Shell
View on GitHub Homepage Documentation

Community & Support

Discord

Similar tools

escapeboy/agent-fleet-o
DB-GPT
agent-lightning
DeepTutor
agent-zero

Beta — feedback welcome: [email protected]