# Anthropic Claude Opus 4.1 — deprecation status

> Yes — Anthropic deprecated Claude Opus 4.1 on June 5, 2026 and shuts it down on August 5, 2026 (in 6 days). The recommended replacement is Claude Opus 4.8.

The August 2025 Opus, and the last Anthropic model priced at $15/$75 per million tokens — three times what Opus costs today. It is the only deprecated Anthropic model still answering requests, and it has days left.

## Facts

| Field | Value |
| --- | --- |
| Provider | Anthropic |
| Model id | `claude-opus-4-1-20250805` |
| Status | Deprecated |
| Aliases | `claude-opus-4-1` |
| Released | August 5, 2025 |
| Deprecated | June 5, 2026 |
| Shutdown | August 5, 2026 (in 6 days) |
| Last verified | July 30, 2026 |

## Replacement

- **Claude Opus 4.8** (`claude-opus-4-8`) · recommended — https://modeldeprecations.dev/anthropic/claude-opus-4-8
  - Opus 4.7 and later reject temperature, top_p and top_k with a 400 error when set to a non-default value. Remove them from the request rather than tuning them down. Opus 4.8 also defaults effort to high on every surface, so set it explicitly if you were relying on a cheaper default.
  - Parameters it accepts: https://modelparams.dev/models/anthropic/claude-opus-4-8

```diff
- "model": "claude-opus-4-1-20250805"
+ "model": "claude-opus-4-8"
```

## FAQ

### When will Anthropic Claude Opus 4.1 shut down?

Anthropic Claude Opus 4.1 is scheduled to shut down on August 5, 2026, in 6 days.

### What replaces Anthropic Claude Opus 4.1?

Anthropic recommends Claude Opus 4.8 (`claude-opus-4-8`) as the replacement for Anthropic Claude Opus 4.1. Opus 4.7 and later reject temperature, top_p and top_k with a 400 error when set to a non-default value. Remove them from the request rather than tuning them down. Opus 4.8 also defaults effort to high on every surface, so set it explicitly if you were relying on a cheaper default.

### Is Anthropic Claude Opus 4.1 still available?

Yes, for now. Anthropic Claude Opus 4.1 is deprecated but still answers requests until August 5, 2026. Deprecated models get no further updates and are the first to lose capacity.

### How do I migrate from Anthropic Claude Opus 4.1 to claude-opus-4-8?

Swap the model id in your API call: replace "claude-opus-4-1-20250805" with "claude-opus-4-8". Opus 4.7 and later reject temperature, top_p and top_k with a 400 error when set to a non-default value. Remove them from the request rather than tuning them down. Opus 4.8 also defaults effort to high on every surface, so set it explicitly if you were relying on a cheaper default.

### Does this apply to claude-opus-4-1 too?

Yes. Anthropic Claude Opus 4.1 is also published as `claude-opus-4-1`; that id shares the same lifecycle dates as `claude-opus-4-1-20250805`.

## 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-opus-4-1-20250805
JSON: https://modeldeprecations.dev/api/v1/models/anthropic/claude-opus-4-1-20250805.json