# Anthropic Claude Sonnet 3.5 v2 — deprecation status

> Yes — Claude Sonnet 3.5 v2 is retired. Anthropic deprecated it on August 13, 2025 and shut it down on October 28, 2025; API requests to it now fail. The recommended replacement is Claude Sonnet 4.6.

The October 2024 Sonnet — confusingly the second model to carry the 3.5 name, which is why the dated id matters here more than anywhere else in the Claude lineup. It introduced computer use and was, for months, the model developers preferred over anything else on the market. Retired October 2025.

## Facts

| Field | Value |
| --- | --- |
| Provider | Anthropic |
| Model id | `claude-3-5-sonnet-20241022` |
| Status | Retired |
| Aliases | `claude-3-5-sonnet-latest` |
| Released | October 22, 2024 |
| Deprecated | August 13, 2025 |
| Shutdown | October 28, 2025 (275 days ago) |
| Last verified | July 30, 2026 |

## Replacement

- **Claude Sonnet 4.6** (`claude-sonnet-4-6`) · recommended — https://modeldeprecations.dev/anthropic/claude-sonnet-4-6
  - The computer-use tool this model introduced has changed shape since; re-read the tool docs rather than porting the 2024 schema.
  - Parameters it accepts: https://modelparams.dev/models/anthropic/claude-sonnet-4-6

```diff
- "model": "claude-3-5-sonnet-20241022"
+ "model": "claude-sonnet-4-6"
```

## FAQ

### When did Anthropic Claude Sonnet 3.5 v2 shut down?

Anthropic Claude Sonnet 3.5 v2 shut down on October 28, 2025. API requests to it fail from that date onward.

### What replaces Anthropic Claude Sonnet 3.5 v2?

Anthropic recommends Claude Sonnet 4.6 (`claude-sonnet-4-6`) as the replacement for Anthropic Claude Sonnet 3.5 v2. The computer-use tool this model introduced has changed shape since; re-read the tool docs rather than porting the 2024 schema.

### Is Anthropic Claude Sonnet 3.5 v2 still available?

No. Anthropic Claude Sonnet 3.5 v2 is retired and no longer served — it was shut down on October 28, 2025. Calls to it return an error.

### How do I migrate from Anthropic Claude Sonnet 3.5 v2 to claude-sonnet-4-6?

Swap the model id in your API call: replace "claude-3-5-sonnet-20241022" with "claude-sonnet-4-6". The computer-use tool this model introduced has changed shape since; re-read the tool docs rather than porting the 2024 schema.

### Does this apply to claude-3-5-sonnet-latest too?

Yes. Anthropic Claude Sonnet 3.5 v2 is also published as `claude-3-5-sonnet-latest`; that id shares the same lifecycle dates as `claude-3-5-sonnet-20241022`.

## Sources

- [Anthropic model deprecations](https://platform.claude.com/docs/en/about-claude/model-deprecations) — accessed 2026-07-30

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Canonical page: https://modeldeprecations.dev/anthropic/claude-3-5-sonnet-20241022
JSON: https://modeldeprecations.dev/api/v1/models/anthropic/claude-3-5-sonnet-20241022.json