Google Container-Optimized OS (COS) End of Life Dates

Operating systems

All 17 Google Container-Optimized OS (COS) release branches: support windows, latest releases, and what each EOL branch has missed since. Updated daily — last refresh 2026-10-05.

4still supported

13end of life

1 Mar 2027next to expire — cos-121

Support lifecycle at a glance

■ supported ■ security fixes only ■ end of life

All versions

Release dates, support status dates and current support status for every Google Container-Optimized OS (COS) branch.

Branch	Released	Support Status ends	Status	Latest
cos-133	28 Sept 2026this month	1 Nov 2028in 2y 1mo	supported	cos-133-19999-44-85
cos-129	21 May 20265mo ago	1 Jul 2028in 1y 9mo	supported	cos-129-19506-505-8
cos-125	9 Oct 20251y ago	1 Feb 2028in 1y 4mo	supported	cos-125-19216-700-7
cos-121	14 Apr 20251y 6mo ago	1 Mar 2027in 5mo	supported	cos-121-18867-624-2
cos-117	2 Oct 20242y ago	1 Sept 20261mo ago	EOL	cos-117-18613-767-2
cos-113	15 Apr 20242y 6mo ago	1 Mar 20267mo ago	EOL	cos-113-18244-582-104
cos-109	27 Sept 20233y ago	1 Sept 20251y 1mo ago	EOL	cos-109-17800-570-50
cos-105	3 Apr 20233y 6mo ago	1 Mar 20251y 7mo ago	EOL	cos-105-17412-535-98
cos-101	15 Sept 20224y 1mo ago	1 Oct 20242y ago	EOL	cos-101-17162-528-64
cos-97	29 Mar 20224y 6mo ago	1 Apr 20242y 6mo ago	EOL	cos-97-16919-450-41
cos-93	18 Oct 20215y ago	1 Oct 20233y ago	EOL	cos-93-16623-461-42
cos-89	7 Apr 20215y 6mo ago	1 Mar 20233y 7mo ago	EOL	cos-89-16108-798-22
cos-85	24 Sept 20206y ago	1 Sept 20224y 1mo ago	EOL	cos-85-13310-1498-13
cos-81	27 Mar 20206y 6mo ago	10 Jan 20224y 9mo ago	EOL	cos-81-12871-1317-8
cos-77	27 Sept 20197y ago	1 Apr 20215y 6mo ago	EOL	cos-77-12371-1109-0
cos-73	25 Mar 20197y 6mo ago	1 Jun 20206y 4mo ago	EOL	cos-73-11647-656-0
cos-69	18 Sept 20188y 1mo ago	1 Dec 20196y 10mo ago	EOL	cos-69-10895-385-0