Retired models
Every Claude model that no longer answers requests on the Claude API — with its retirement date, its replacement, and where it may still be reachable.
Last verified August 21, 2026 · 2 sources
A retired model does not degrade. It fails — requests to it return an error. This page exists so you can check a model ID you found in an old codebase without reading a deprecation history.
Retired on the Claude API
| Model | Retired | Replacement | Still on partner clouds? |
|---|---|---|---|
claude-opus-4-1-20250805 |
5 Aug 2026 | claude-opus-4-8 |
Bedrock and Google Cloud |
claude-sonnet-4-20250514 |
15 Jun 2026 | claude-sonnet-4-6 |
Bedrock and Google Cloud |
claude-opus-4-20250514 |
15 Jun 2026 | claude-opus-4-8 |
Google Cloud |
claude-3-haiku-20240307 |
20 Apr 2026 | claude-haiku-4-5-20251001 |
— |
claude-3-7-sonnet-20250219 |
19 Feb 2026 | claude-sonnet-4-6 |
— |
claude-3-5-haiku-20241022 |
19 Feb 2026 | claude-haiku-4-5-20251001 |
Bedrock and Google Cloud |
claude-3-opus-20240229 |
5 Jan 2026 | claude-opus-4-8 |
— |
claude-3-5-sonnet-20241022 |
28 Oct 2025 | claude-sonnet-4-6 |
— |
claude-3-5-sonnet-20240620 |
28 Oct 2025 | claude-sonnet-4-6 |
— |
claude-3-sonnet-20240229 |
21 Jul 2025 | claude-sonnet-4-6 |
— |
claude-2.1 |
21 Jul 2025 | claude-opus-4-8 |
— |
claude-2.0 |
21 Jul 2025 | claude-opus-4-8 |
— |
claude-1.0 – claude-1.3 |
6 Nov 2024 | claude-haiku-4-5-20251001 |
— |
claude-instant-1.0 – 1.2 |
6 Nov 2024 | claude-haiku-4-5-20251001 |
— |
Also deprecated: claude-mythos-preview, superseded by
claude-mythos-5.
“Retired” is per-platform, not absolute
The fourth column is the part people miss. Anthropic’s retirement dates govern Anthropic-operated platforms — the Claude API, Claude Platform on AWS and Microsoft Foundry. Amazon Bedrock and Google Cloud are partner-operated and set their own schedules, so several of these still answer requests there.
That is genuinely useful if you need an old model for a locked evaluation or a reproducibility requirement. It is not a commitment — the partner will retire it eventually too, on a calendar you have to track separately.
Prices are frozen at the old rates
Retired models kept their pricing, and the older ones were expensive: Claude Opus 4.1 and Opus 4 sit at $15 in / $75 out per million tokens — three times Opus 5 for a model two generations behind. If cost is why you have not migrated, check the number again.
The notice you should have received
Anthropic gives at least 60 days’ notice by email to customers with active deployments before retiring a publicly released model. If a retirement surprised you, the deployment was probably invisible to that notice — a forgotten cron job, a test key, a service under a different account.
The Console’s Usage page exports a CSV by API key and model. Run it now rather than after the next retirement.
Sources
- 01Model deprecations — Claude Platform DocsOfficialplatform.claude.comThe authoritative status table and full deprecation history.
- 02Pricing — Claude Platform DocsOfficialplatform.claude.comRecords which retired models remain available on partner clouds.
Page changelog
- RemovedClaude Opus 4.1 retired on the Claude API.
- RemovedClaude Sonnet 4 and Claude Opus 4 retired on the Claude API.