No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
stable-baselines3 has 1.5M monthly downloads and 14K GitHub stars. Version 2.9.0 supports Python 3.10+, first published in 2020.
It is actively maintained under a permissive license, last released in Jun 2026.
It is built on top of cloudpickle, gymnasium and numpy. It is used by 123 tracked packages, including sb3-contrib, datenwissenschaften and csle-common.
GitHub topics include reinforcement-learning, reinforcement-learning-algorithms and machine-learning.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
90
Popularity
87
Adoption
70
Community
80
Provenance
0
How the maintenance status was determined
Last commit
21 days ago
Monthly downloads
1,537,604
•
Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
1,537,604
Stars
13,529
Stars per 1k downloads
8.80
Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
•
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
47,050
Month daily avg
51,253
Momentum
-8.2%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.10
Cutting Edge
Minimum supported version is 3.12 or newer
•
Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
MIT
•
Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
21 days ago
Total releases
115
Releases/year
18.6
•
Rapid
Last release within 365 days and > 12 releases/year
Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
176
Monthly downloads
1,537,604
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
•
Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
70
Issue Burden
4.2
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
8.2%
contrib / forks
Stale Release
No
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
27.9K
Windows
3.1K
macOS
1.7K
Python Versions
3.12
51.3%
16.6K
3.11
20.6%
6.7K
3.13
14.3%
4.6K
3.10
8.5%
2.7K
3.14
5.2%
1.7K
Top Countries
1.
US
21.4K
US
2.
FR
5.8K
FR
3.
DE
634
DE
4.
CN
605
CN
5.
SG
572
SG
6.
JP
458
JP
7.
VN
390
VN
8.
IN
318
IN
9.
GB
267
GB
10.
TW
223
TW
Dependencies
4
- cloudpickle
- gymnasium <2.0,>=0.29.1
- numpy <3.0,>=1.20
- torch <3.0,>=2.8
23 optional dependencies
- ale-py[extra]
- black[tests]
- matplotlib[extra]
- mypy[tests]
- myst-parser[docs]
- opencv-python[extra]
- pandas[extra]
- pillow[extra]
- psutil[extra]
- pygame-ce[extra]
- pytest[tests]
- pytest-cov[tests]
- pytest-env[tests]
- pytest-xdist[tests]
- rich[extra]
- ruff[tests]
- sphinx[docs]
- sphinx-autobuild[docs]
- sphinx-copybutton[docs]
- sphinx-rtd-theme[docs]
- sphinxcontrib-spelling[docs]
- tensorboard[extra]
- tqdm[extra]
Used By
123
- sb3-contrib
- datenwissenschaften
- csle-common
- infralib
- csle-agents
- sbx-rl
- godot-rl
- eta-incerto
- ants-ai
- pyforge3d
- eta-mistral
- deepmost
- cleanrl
- async-gym-agents
- reinforcement-learning-framework
- kitagentsdk
- elscirl
- il-datasets
- mouse-env
- sb3-extra-buffers
- gym-flp
- isopro
- ptan
- lineflow-rl
- ns-gym
- huggingbutt
- gr-libs
- scml-agents
- master-agent
- assetallocator
- attacks-on-drl
- commonpower
- swarm-drone-gym
- crosslearn
- slim-gym
- quantummetagpt
- loopquest
- neatrl
- dsmc-tool
- eagerx-dcsc-setups
- epyt-control
- pyhyflex
- ntn-torch
- gymnasium-search-race
- marlos
- cfrl
- rnl
- nett-benchmarks
- rlxbt
- pyrewardmachines
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MIT
First Release
May 7, 2020
Last Release
3 weeks ago
Last Commit
3 weeks ago
Latest Version
2.9.0
Total Releases
115
Contributors
176
Open PRs
28
Archived
No
Author
Antonin Raffin
Python Versions
3
3.10
3.11
3.12
3.13
Wheels
py3
Keywords
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh