# Anthropic model retirements: dates and replacements

20 retirements on the Anthropic API that the Upseam record lists with a date, an official notice and a named replacement. Newest first.

- 2026-11-30 (Scheduled, in 47 days): `claude-sonnet-4-5-20250929`, replacement `claude-sonnet-5-5`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2026-09-30-claude-sonnet-4-5-model
- 2026-08-05 (Retired, 70 days ago): `claude-opus-4-1-20250805`, replacement `claude-opus-4-8`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2026-06-05-claude-opus-4-1-model
- 2026-06-15 (Retired, 121 days ago): `claude-opus-4-20250514`, replacement `claude-opus-4-8`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2026-04-14-claude-sonnet-4-and-claude-opus-4-models
- 2026-06-15 (Retired, 121 days ago): `claude-sonnet-4-20250514`, replacement `claude-sonnet-5-5`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2026-04-14-claude-sonnet-4-and-claude-opus-4-models
- 2026-04-20 (Retired, 177 days ago): `claude-3-haiku-20240307`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2026-02-19-claude-haiku-3-model
- 2026-02-19 (Retired, 237 days ago): `claude-3-5-haiku-20241022`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-12-19-claude-haiku-3-5-model
- 2026-02-19 (Retired, 237 days ago): `claude-3-7-sonnet-20250219`, replacement `claude-sonnet-5-5`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-10-28-claude-sonnet-3-7-model
- 2026-01-05 (Retired, 282 days ago): `claude-3-opus-20240229`, replacement `claude-opus-4-8`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-06-30-claude-opus-3-model
- 2025-10-28 (Retired, 351 days ago): `claude-3-5-sonnet-20240620`, replacement `claude-sonnet-5-5`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-08-13-claude-sonnet-3-5-models
- 2025-10-28 (Retired, 351 days ago): `claude-3-5-sonnet-20241022`, replacement `claude-sonnet-5-5`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-08-13-claude-sonnet-3-5-models
- 2025-07-21 (Retired, 450 days ago): `claude-2.0`, replacement `claude-opus-4-8`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-01-21-claude-2-claude-2-1-and-claude-sonnet-3-models
- 2025-07-21 (Retired, 450 days ago): `claude-2.1`, replacement `claude-opus-4-8`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-01-21-claude-2-claude-2-1-and-claude-sonnet-3-models
- 2025-07-21 (Retired, 450 days ago): `claude-3-sonnet-20240229`, replacement `claude-sonnet-5-5`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-01-21-claude-2-claude-2-1-and-claude-sonnet-3-models
- 2024-11-06 (Retired, 707 days ago): `claude-1.0`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models
- 2024-11-06 (Retired, 707 days ago): `claude-1.1`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models
- 2024-11-06 (Retired, 707 days ago): `claude-1.2`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models
- 2024-11-06 (Retired, 707 days ago): `claude-1.3`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models
- 2024-11-06 (Retired, 707 days ago): `claude-instant-1.0`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models
- 2024-11-06 (Retired, 707 days ago): `claude-instant-1.1`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models
- 2024-11-06 (Retired, 707 days ago): `claude-instant-1.2`, replacement `claude-haiku-4-5-20251001`. Notice: https://platform.claude.com/docs/en/about-claude/model-deprecations#2024-09-04-claude-1-and-instant-models