# Migrating off claude-3-5-sonnet-20240620

**Anthropic** retires **claude-3-5-sonnet-20240620** on **2025-10-28**.
Documented replacement: **claude-sonnet-4-6**.

Source: https://docs.anthropic.com/en/docs/about-claude/model-deprecations
Source check date not recorded.
Calendar as of 2026-09-15 UTC.

| Model | Provider | Retires | Replacement |
|---|---|---|---|
| claude-3-5-sonnet-20240620 | Anthropic | 2025-10-28 | claude-sonnet-4-6 |

Also retiring on 2025-10-28:
- claude-3-5-sonnet-20241022 (Anthropic) → claude-sonnet-4-6

Source: https://llmlatency.dev/migrate/anthropic-claude-3-5-sonnet-20240620