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Claude Sonnet 4.5 deprecation & shutdown dates
3 Claude Sonnet 4.5 versions tracked across 3 providers. Next shutdown: claude-sonnet-4-5-20250929 on Anthropic, Nov 30, 2026. Official replacements named: claude-sonnet-5-5.
Last checked 2026-10-18 on the official deprecation pages.
Every Claude Sonnet 4.5 version on every provider we track, with the date and replacement each official deprecation page gives.
| Model ID | Provider | Status | Shutdown | Replacement |
|---|---|---|---|---|
claude-sonnet-4-5-20250929 | Anthropic | scheduled | Nov 30, 2026 | claude-sonnet-5-5 (see its shutdown status) |
claude-sonnet-4-5 (1) | Azure OpenAI | scheduled | Nov 30, 2026 | claude-sonnet-5-5 |
anthropic.claude-sonnet-4-5-20250929-v1:0 (Claude Sonnet 4.5) | AWS Bedrock · Anthropic | scheduled | Apr 8, 2027 | None listed by provider |
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Frequently asked questions
When is Claude Sonnet 4.5 being deprecated?
3 Claude Sonnet 4.5 versions tracked across 3 providers. Next shutdown: claude-sonnet-4-5-20250929 on Anthropic, Nov 30, 2026. Official replacements named: claude-sonnet-5-5.
What replaces Claude Sonnet 4.5?
The providers name: claude-sonnet-5-5.
When does claude-sonnet-4-5-20250929 on Anthropic shut down?
claude-sonnet-4-5-20250929 on Anthropic shuts down on Nov 30, 2026. Recommended replacement: claude-sonnet-5-5.
When does claude-sonnet-4-5 (1) on Azure OpenAI shut down?
claude-sonnet-4-5 (1) on Azure OpenAI shuts down on Nov 30, 2026. Recommended replacement: claude-sonnet-5-5.
When does anthropic.claude-sonnet-4-5-20250929-v1:0 (Claude Sonnet 4.5) on AWS Bedrock · Anthropic shut down?
anthropic.claude-sonnet-4-5-20250929-v1:0 (Claude Sonnet 4.5) on AWS Bedrock · Anthropic shuts down on Apr 8, 2027. The provider lists no replacement.