# Migrating off claude-2.1

**Anthropic** retires **claude-2.1** on **2025-07-21**.
Documented replacement: **claude-opus-4-8**.

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-2.1 | Anthropic | 2025-07-21 | claude-opus-4-8 |

Also retiring on 2025-07-21:
- claude-2.0 (Anthropic) → claude-opus-4-8
- claude-3-sonnet-20240229 (Anthropic) → claude-sonnet-4-6

Source: https://llmlatency.dev/migrate/anthropic-claude-2-1