Which Anthropic models are being deprecated?

1 Anthropic models have announced retirement dates. The next is claude-opus-4-1-20250805 on 2026-08-05, replaced by claude-opus-4-8.

What replaces the retired Anthropic models?

Anthropic names a replacement for most retirements — for example claude-opus-4-1-20250805 is replaced by claude-opus-4-8. Every replacement listed here comes from Anthropic's own deprecation page.

Where do these dates come from?

Directly from Anthropic's official deprecation documentation, re-fetched weekly. Nothing is estimated: each row links to the page it was read from, and unverified entries are not published.

Anthropic model deprecations — retirement dates and replacements

Re-checked weekly · last verified July 25, 2026

Anthropic has 1 model scheduled for retirement. The next is claude-opus-4-1-20250805 on 2026-08-05, with claude-opus-4-8 named as the replacement. Every date below is taken from Anthropic’s own deprecation page and re-checked weekly.

Which Anthropic models are being retired, and when?

Model	Shutdown	Replacement	Source
`claude-opus-4-1-20250805`	2026-08-05	claude-opus-4-8	source

claude-opus-4-1-20250805 — Anthropic retires this model on 2026-08-05. The published replacement is claude-opus-4-8. It was announced on 2026-06-05. Source.

How fast is the Anthropic API once you migrate?

Knowing the shutdown date only solves half the problem. These are our own measurements of the live Anthropic API, so you can see what the endpoint you are migrating to actually costs you in latency, by region:

Region	p50 TTFB	Uptime
Asia (Tokyo)	254 ms	100%
Europe (Germany)	202 ms	100%
South America (São Paulo)	211 ms	100%
US (Central)	112 ms	100%

Edge latency over the last 24 hours. Full Anthropic latency detail →

Which Anthropic models have already been retired?

Model	Retired	Replacement	Source
`claude-mythos-preview`	2026-07-21	claude-mythos-5	source
`claude-opus-4-20250514`	2026-06-15	claude-opus-4-8	source
`claude-sonnet-4-20250514`	2026-06-15	claude-sonnet-4-6	source
`claude-3-haiku-20240307`	2026-04-20	claude-haiku-4-5-20251001	source
`claude-3-5-haiku-20241022`	2026-02-19	claude-haiku-4-5-20251001	source
`claude-3-7-sonnet-20250219`	2026-02-19	claude-sonnet-4-6	source
`claude-3-opus-20240229`	2026-01-05	claude-opus-4-8	source
`claude-3-5-sonnet-20240620`	2025-10-28	claude-sonnet-4-6	source
`claude-3-5-sonnet-20241022`	2025-10-28	claude-sonnet-4-6	source
`claude-2.0`	2025-07-21	claude-opus-4-8	source
`claude-2.1`	2025-07-21	claude-opus-4-8	source
`claude-3-sonnet-20240229`	2025-07-21	claude-sonnet-4-6	source
`claude-1.0`	2024-11-06	claude-haiku-4-5-20251001	source
`claude-1.1`	2024-11-06	claude-haiku-4-5-20251001	source
`claude-1.2`	2024-11-06	claude-haiku-4-5-20251001	source

How is this calendar maintained?

A scheduled job re-reads Anthropic’s official deprecation page every week and rewrites this table from it. Entries that cannot be traced to a published source are not shown at all, which is why every row carries a source link. Dates change: providers extend deadlines and occasionally bring them forward, so this page reflects what the vendor documented at the last check, not a prediction.

All providers: full deprecation calendar · Latency data under CC BY 4.0: JSON API