The following table provides a summary of Container-Optimized OS releases available on
Compute Engine:

### Active Milestones

OS version |
Image project |
Image family |
Built by |
Deprecation date |
Release notes |

COS 85 LTS |
`cos-cloud` |
`cos-85-lts` |
Google |
December 2021 |
milestone 85 |

COS 81 LTS |
`cos-cloud` |
`cos-81-lts` |
Google |
June 2021 |
milestone 81 |

COS 77 LTS |
`cos-cloud` |
`cos-77-lts` |
Google |
December 2020 |
milestone 77 |

### Past Milestones

OS version |
Image project |
Image family |
Built by |
Deprecation date |
Release Notes |

COS 73 LTS |
`cos-cloud` |
`cos-73-lts` |
Google |
June 2020 |
milestone 73 |

COS 69 LTS |
`cos-cloud` |
`cos-69-lts` |
Google |
December 2019 |
milestone 69 |