Model ID lookup

Claude Model Deprecation Checker

Enter or select a Claude model ID to see active, deprecated, retired, or limited status, replacement guidance, dates, and cited source.

Verified 2026-07-06Client-side onlyClaude Archive is an independent educational publication and is not affiliated with Anthropic.

Checker

Look up a Claude model ID

Paste a model ID from code or select one from the menu. The result is local to your browser.

Model ID or namePick from archive

Common legacy ID	Status	Retirement	Replacement
`claude-mythos-5` Claude Mythos 5	Limited	N/A	N/A
`claude-opus-4-1-20250805` Claude Opus 4.1	Deprecated	2026-08-05	claude-opus-4-8
`claude-opus-4-20250514` Claude Opus 4	Retired	2026-06-15	claude-opus-4-8
`claude-sonnet-4-20250514` Claude Sonnet 4	Retired	2026-06-15	claude-sonnet-4-6
`claude-3-7-sonnet-20250219` Claude 3.7 Sonnet	Retired	2026-02-19	claude-sonnet-4-6
`claude-3-5-sonnet-20241022` Claude 3.5 Sonnet upgraded snapshot	Retired	2025-10-28	claude-sonnet-4-6
`claude-3-5-sonnet-20240620` Claude 3.5 Sonnet initial snapshot	Retired	2025-10-28	claude-sonnet-4-6
`claude-3-5-haiku-20241022` Claude 3.5 Haiku	Retired	2026-02-19	claude-haiku-4-5-20251001
`claude-3-haiku-20240307` Claude 3 Haiku	Retired	2026-04-20	claude-haiku-4-5-20251001
`claude-3-opus-20240229` Claude 3 Opus	Retired	2026-01-05	claude-opus-4-8
`claude-3-sonnet-20240229` Claude 3 Sonnet	Retired	2025-07-21	claude-sonnet-4-6
`claude-2.1` Claude 2.1	Retired	2025-07-21	claude-opus-4-8

How to use it

Retired means the model is no longer available on Anthropic-operated platforms and requests to that ID fail.

It focuses on Anthropic-operated platform status. Partner-operated platforms can have separate exceptions and should be checked directly.

Move before the retirement date, test the replacement on your workload, and check the official migration guide for behavior changes.