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model-deprecations changedabout-claude/model-deprecations

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits12to this page, all time

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126126 
127127| Retirement date | Deprecated model | Recommended replacement |
128128| --------------- | -------------------------- | ----------------------- |
129| June 15, 2026 | `claude-sonnet-4-20250514` | `claude-sonnet-4-6` |
129| June 15, 2026 | `claude-sonnet-4-20250514` | `claude-sonnet-5-5` |
130130| June 15, 2026 | `claude-opus-4-20250514` | `claude-opus-4-8` |
131131 
132132### 2026-02-19: Claude Haiku 3 model
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163163 
164164| Retirement date | Deprecated model | Recommended replacement |
165165| ----------------- | ---------------------------- | ----------------------- |
166| February 19, 2026 | `claude-3-7-sonnet-20250219` | `claude-sonnet-4-6` |
166| February 19, 2026 | `claude-3-7-sonnet-20250219` | `claude-sonnet-5-5` |
167167 
168168### 2025-08-13: Claude Sonnet 3.5 models
169169 
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175175 
176176| Retirement date | Deprecated model | Recommended replacement |
177177| ---------------- | ---------------------------- | ----------------------- |
178| October 28, 2025 | `claude-3-5-sonnet-20240620` | `claude-sonnet-4-6` |
179| October 28, 2025 | `claude-3-5-sonnet-20241022` | `claude-sonnet-4-6` |
178| October 28, 2025 | `claude-3-5-sonnet-20240620` | `claude-sonnet-5-5` |
179| October 28, 2025 | `claude-3-5-sonnet-20241022` | `claude-sonnet-5-5` |
180180 
181181### 2025-06-30: Claude Opus 3 model
182182 
from line 202
202202| --------------- | -------------------------- | ----------------------- |
203203| July 21, 2025 | `claude-2.0` | `claude-opus-4-8` |
204204| July 21, 2025 | `claude-2.1` | `claude-opus-4-8` |
205| July 21, 2025 | `claude-3-sonnet-20240229` | `claude-sonnet-4-6` |
205| July 21, 2025 | `claude-3-sonnet-20240229` | `claude-sonnet-5-5` |
206206 
207207### 2024-09-04: Claude 1 and Instant models
208208 
from line 226
226226 
227227Anthropic occasionally deprecates request parameters that no longer apply to current models. How the API treats a deprecated parameter depends on the model, as the following table shows. Most SDKs keep deprecated parameters in their request types so existing code continues to type-check. The Python SDK (v1.0 and later) removes `temperature`, `top_p`, and `top_k`, so passing them raises a `TypeError`.
228228 
229| Parameter | Status | Behavior | Recommended replacement |
230| ------------------------------- | -------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
231| `temperature`, `top_p`, `top_k` | Deprecated (Claude Opus 4.7 and later) | Returns a 400 error when set to a non-default value on Claude 4.7 and later models and [Claude Mythos Preview](https://anthropic.com/glasswing). | Omit and use [prompting](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices) to guide model behavior. |
229| Parameter | Status | Behavior | Recommended replacement |
230| ------------------------------- | ---------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
231| `temperature`, `top_p`, `top_k` | Deprecated (Claude 4.7 and later models) | Returns a 400 error when set to a non-default value on Claude 4.7 and later models and [Claude Mythos Preview](https://anthropic.com/glasswing). | Omit and use [prompting](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices) to guide model behavior. |
232232 
233233For migration steps, see the [migration guide](https://platform.claude.com/docs/en/about-claude/models/migration-guide).
234234 
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