model-deprecations changedabout-claude/model-deprecations
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66
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First seen
14 Aug 2026
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Recorded edits12to this page, all time
### 2026-09-30: Claude Sonnet 4.5 model
The whole hunk
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6666
6767Current and recently retired models are listed in the following table with their status:
6868
69| API model name | Current state | Deprecated | Tentative retirement date |
70| :------------------------- | :------------ | :---------------- | :--------------------------------- |
71| claude-fable-5-1 | Active | N/A | Not sooner than September 1, 2027 |
72| claude-mythos-5-1 | Active | N/A | Not sooner than September 1, 2027 |
73| claude-fable-5 | Active | N/A | Not sooner than June 9, 2027 |
74| claude-mythos-5 | Active | N/A | Not sooner than June 9, 2027 |
75| claude-mythos-preview | Deprecated | June 9, 2026 | To be announced |
76| claude-opus-5-5 | Active | N/A | Not sooner than September 22, 2027 |
77| claude-opus-5 | Active | N/A | Not sooner than July 24, 2027 |
78| claude-opus-4-8 | Active | N/A | Not sooner than May 28, 2027 |
79| claude-opus-4-7 | Active | N/A | Not sooner than April 16, 2027 |
80| claude-opus-4-6 | Active | N/A | Not sooner than February 5, 2027 |
81| claude-opus-4-5-20251101 | Active | N/A | Not sooner than November 24, 2026 |
82| claude-opus-4-1-20250805 | Retired | June 5, 2026 | August 5, 2026 |
83| claude-opus-4-20250514 | Retired | April 14, 2026 | June 15, 2026 |
84| claude-sonnet-5-5 | Active | N/A | Not sooner than September 28, 2027 |
85| claude-sonnet-5 | Active | N/A | Not sooner than June 30, 2027 |
86| claude-sonnet-4-6 | Active | N/A | Not sooner than February 17, 2027 |
87| claude-sonnet-4-5-20250929 | Active | N/A | Not sooner than September 29, 2026 |
88| claude-sonnet-4-20250514 | Retired | April 14, 2026 | June 15, 2026 |
89| claude-3-7-sonnet-20250219 | Retired | October 28, 2025 | February 19, 2026 |
90| claude-haiku-4-5-20251001 | Active | N/A | Not sooner than October 15, 2026 |
91| claude-3-5-haiku-20241022 | Retired | December 19, 2025 | February 19, 2026 |
92| claude-3-haiku-20240307 | Retired | February 19, 2026 | April 20, 2026 |
69| API model name | Current state | Deprecated | Tentative retirement date |
70| -------------------------- | ------------- | ------------------ | ---------------------------------- |
71| claude-fable-5-1 | Active | N/A | Not sooner than September 1, 2027 |
72| claude-mythos-5-1 | Active | N/A | Not sooner than September 1, 2027 |
73| claude-fable-5 | Active | N/A | Not sooner than June 9, 2027 |
74| claude-mythos-5 | Active | N/A | Not sooner than June 9, 2027 |
75| claude-mythos-preview | Deprecated | June 9, 2026 | To be announced |
76| claude-opus-5-5 | Active | N/A | Not sooner than September 22, 2027 |
77| claude-opus-5 | Active | N/A | Not sooner than July 24, 2027 |
78| claude-opus-4-8 | Active | N/A | Not sooner than May 28, 2027 |
79| claude-opus-4-7 | Active | N/A | Not sooner than April 16, 2027 |
80| claude-opus-4-6 | Active | N/A | Not sooner than February 5, 2027 |
81| claude-opus-4-5-20251101 | Active | N/A | Not sooner than November 24, 2026 |
82| claude-opus-4-1-20250805 | Retired | June 5, 2026 | August 5, 2026 |
83| claude-opus-4-20250514 | Retired | April 14, 2026 | June 15, 2026 |
84| claude-sonnet-5-5 | Active | N/A | Not sooner than September 28, 2027 |
85| claude-sonnet-5 | Active | N/A | Not sooner than June 30, 2027 |
86| claude-sonnet-4-6 | Active | N/A | Not sooner than February 17, 2027 |
87| claude-sonnet-4-5-20250929 | Deprecated | September 30, 2026 | November 30, 2026 |
88| claude-sonnet-4-20250514 | Retired | April 14, 2026 | June 15, 2026 |
89| claude-3-7-sonnet-20250219 | Retired | October 28, 2025 | February 19, 2026 |
90| claude-haiku-4-5-20251001 | Active | N/A | Not sooner than October 15, 2026 |
91| claude-3-5-haiku-20241022 | Retired | December 19, 2025 | February 19, 2026 |
92| claude-3-haiku-20240307 | Retired | February 19, 2026 | April 20, 2026 |
9393
9494## Deprecation history
9595
9696All deprecations are listed in the following sections, with the most recent announcements first.
97
98### 2026-09-30: Claude Sonnet 4.5 model
99
100On September 30, 2026, Anthropic notified developers using Claude Sonnet 4.5 of its upcoming retirement on the Claude API.
101
102| Retirement date | Deprecated model | Recommended replacement |
103| ----------------- | ---------------------------- | ----------------------- |
104| November 30, 2026 | `claude-sonnet-4-5-20250929` | `claude-sonnet-5-5` |
97105
98106### 2026-06-05: Claude Opus 4.1 model
99107
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