# Migrating off claude-sonnet-5-5

**Anthropic** retires **claude-sonnet-5-5** on **2027-09-28** (in 363 days).
No replacement named by the provider.

Source: https://docs.anthropic.com/en/docs/about-claude/model-deprecations
Source last checked: 2026-09-30.
Calendar as of 2026-09-30 UTC.

| Model | Provider | Retires | Replacement |
|---|---|---|---|
| claude-sonnet-5-5 | Anthropic | 2027-09-28 | — not named |

Source: https://llmlatency.dev/migrate/anthropic-claude-sonnet-5-5