Lightning-AI/pytorch-lightning

Pretrain, finetune ANY AI model of ANY size on 1 or 10,000+ GPUs with zero code changes.

31.4k stars · 3.8k forks · Python

Healthy

Healthy: actively maintained by 9 people, no known risks.

Why

No rule fired.

What would change this

A dormant maintenance status, a deprecated or archived package, a successor link, or a critical advisory would change this.

Maintenance

Complete

Active

Human commits, 30 days: 2
Human commits, 90 days: 23
Human commits, 365 days: 173
Bot share of commits, 365 days: 33%
Last commit: Sep 21, 2026 (23 days ago)
Last human commit: Sep 21, 2026 (23 days ago)
Authors, 90 days: 9
Last release: Sep 10, 2026 (1 month ago)
Median PR merge time: 4 days

Responsiveness: of 28 recent issues, 79% got a maintainer reply. Median first response: 16 days.

Sources: Commits, Releases, Merged pull requests, Issues

People

Complete

Owner: Organization
Commits sampled: 173 since Oct 14, 2025
Authors for half of commits: 4
Authors for 80% of commits: 14
Contributors: 431

Top committers

bhimrazy: 24% of commits
deependujha: 14% of commits
SkafteNicki: 9% of commits
justusschock: 7% of commits
GdoongMathew: 5% of commits

Sources: Commits, Contributors

Stars

Complete

Mostly organic, confidence high

Bars show stars gained each week. Orange bars overlap a burst.

Bursts

Jul 26, 2019 to Jul 30, 2019: about 34 more stars than usual, peak 10 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Aug 2, 2019 to Aug 21, 2019: about 1.3k more stars than usual, peak 244 in one day, a spike that tapers off. No outside explanation found, so this burst is unexplained.
Oct 11, 2019 to Oct 11, 2019: about 24 more stars than usual, peak 31 in one day, a shape we can't classify. Outside explanation: a jump in forks, a jump in issues and pull requests.
Feb 27, 2020 to Feb 29, 2020: about 129 more stars than usual, peak 83 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
May 11, 2020 to May 12, 2020: about 94 more stars than usual, peak 69 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jul 14, 2020 to Jul 15, 2020: about 121 more stars than usual, peak 102 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Sep 8, 2020 to Sep 10, 2020: about 301 more stars than usual, peak 161 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Oct 24, 2020 to Oct 26, 2020: about 316 more stars than usual, peak 197 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Nov 17, 2020 to Nov 19, 2020: about 278 more stars than usual, peak 165 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Feb 27, 2021 to Feb 27, 2021: about 125 more stars than usual, peak 140 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jun 25, 2021 to Jun 27, 2021: about 286 more stars than usual, peak 198 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jul 31, 2021 to Aug 1, 2021: about 92 more stars than usual, peak 91 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Nov 12, 2021 to Nov 12, 2021: about 100 more stars than usual, peak 113 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jun 21, 2022 to Jun 23, 2022: about 230 more stars than usual, peak 186 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
May 5, 2023 to May 6, 2023: about 57 more stars than usual, peak 53 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Feb 2, 2024 to Feb 4, 2024: about 276 more stars than usual, peak 170 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.

1 stars GitHub has since removed (tracked since Oct 14, 2026).

Anyone can buy stars for any repo; bursts alone don't prove the owner did.

Some star bursts have no matching forks, issues, releases, or launch coverage.
Anyone can buy stars for any repo, so this describes the star history only.

Sources: How star history is analyzed

Risk

Complete

Flags

No risk flags.

License

Now: Apache-2.0 (OSI-approved)
A year ago: Apache-2.0 (OSI-approved)

Packages

No published packages found.

OpenSSF Scorecard: 5.9 out of 10 (via deps.dev).

Sources: GitHub: Lightning-AI/pytorch-lightning

Badge

Add this to a README to show the current verdict:

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Earlier verdicts

Oct 14, 2026: Healthy
Oct 14, 2026: Healthy

Computed 11 hours ago · method 2026.10.2