PyRank
quantumlib

cirq-core

Python framework for creating, editing, and running Noisy Intermediate-Scale Quantum (NISQ) circuits.
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

cirq-core has 485K monthly downloads and 5K GitHub stars. Version 1.7.0 supports Python 3.11.0+, first published in 2021.

It is actively maintained under a permissive license, last released in Jun 2026.

It is built on top of attrs, duet and matplotlib. It is used by 37 tracked packages, including cirq-google, cirq and cirq-ionq.

GitHub topics include nisq, quantum-algorithms and quantum-computing.

Shared Repository
This package shares its GitHub repository (quantumlib/cirq) with 12 other packages. Stars, forks, and other GitHub metrics reflect the entire repository.
Downloads
Day
15.0K
Week
130.1K
Month
485.4K
Stars
5.0K
Forks
1.2K
Issues
92
Version
1.7.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
81
Adoption
86
Community
90
Provenance
0
How the maintenance status was determined
Last commit
5 days ago
Monthly downloads
485,386
• 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
485,386
Stars
5,005
Stars per 1k downloads
10.31
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
18,586
Month daily avg
16,180
Momentum
+14.9%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
>=3.11.0
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
Apache-2.0
• 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
7 days ago
Total releases
2,426
Releases/year
465.1
• 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
272
Monthly downloads
485,386
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
79
 
Issue Burden
18.4
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
21.9%
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 7.8K
macOS 674
Windows 124

Python Versions

3.12
53.0% 4.5K
3.11
24.6% 2.1K
3.10
10.7% 901
3.13
10.4% 876
3.14
1.2% 101

Top Countries

1. US US
8.7K
2. CN CN
2.6K
3. TW TW
1.3K
4. SG SG
530
5. IE IE
302
6. HK HK
70
7. JP JP
34
8. DE DE
33
9. FI FI
32
10. AU AU
20

Package Information

License
Apache-2.0
First Release
April 19, 2021
Last Release
1 week ago
Last Commit
6 days ago
Latest Version
1.7.0
Total Releases
2,426
Contributors
272
Open PRs
23
Archived
No
Author
The Cirq Developers
Python Versions
3 3.11 3.12 3.13 3.14
Wheels
py3
Keywords
algorithms api cirq google google quantum nisq python quantum quantum algorithms quantum circuit quantum circuit simulator quantum computer simulator quantum computing quantum development kit quantum information quantum programming quantum programming language quantum simulation sdk simulation
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links