Anthropic Claude claude-1.1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Anthropic Claude claude-1.1 reached end of life on 6 Nov 2024. It no longer receives security fixes.
Support timeline
Official dates from the Anthropic Claude release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 14 Mar 2023 | 3y 7mo ago |
| Active support ended | 4 Sept 2024 | security fixes only after this |
| Deprecated support ended | 6 Nov 2024 | 1y 11mo ago |
| Latest release | — | final |
Where to go from claude-1.1
Recommended target: Anthropic Claude claude-sonnet-5-5 (supported until 28 Sept 2027).
The newest actively supported branch is Anthropic Claude claude-sonnet-5-5 (latest release ).
Frequently asked questions
Is Anthropic Claude claude-1.1 still safe to use?
Anthropic Claude claude-1.1 reached end of life on 6 Nov 2024, 701 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Anthropic Claude claude-1.1?
Yes — the final release (claude-1.1) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Anthropic Claude claude-1.1 to?
Upgrade to Anthropic Claude claude-sonnet-5-5, the newest actively supported branch (supported until 28 Sept 2027).