Anthropic

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.

2026-11-30Scheduled, in 47 days claude-sonnet-4-5-20250929 Replace with claude-sonnet-5-5 Official notice Details
2026-08-05Retired, 70 days ago claude-opus-4-1-20250805 Replace with claude-opus-4-8 Official notice Details
2026-06-15Retired, 121 days ago claude-opus-4-20250514 Replace with claude-opus-4-8 Official notice Details
2026-06-15Retired, 121 days ago claude-sonnet-4-20250514 Replace with claude-sonnet-5-5 Official notice Details
2026-04-20Retired, 177 days ago claude-3-haiku-20240307 Replace with claude-haiku-4-5-20251001 Official notice Details
2026-02-19Retired, 237 days ago claude-3-5-haiku-20241022 Replace with claude-haiku-4-5-20251001 Official notice Details
2026-02-19Retired, 237 days ago claude-3-7-sonnet-20250219 Replace with claude-sonnet-5-5 Official notice Details
2026-01-05Retired, 282 days ago claude-3-opus-20240229 Replace with claude-opus-4-8 Official notice Details
2025-10-28Retired, 351 days ago claude-3-5-sonnet-20240620 Replace with claude-sonnet-5-5 Official notice Details
2025-10-28Retired, 351 days ago claude-3-5-sonnet-20241022 Replace with claude-sonnet-5-5 Official notice Details
2025-07-21Retired, 450 days ago claude-2.0 Replace with claude-opus-4-8 Official notice Details
2025-07-21Retired, 450 days ago claude-2.1 Replace with claude-opus-4-8 Official notice Details
2025-07-21Retired, 450 days ago claude-3-sonnet-20240229 Replace with claude-sonnet-5-5 Official notice Details
2024-11-06Retired, 707 days ago claude-1.0 Replace with claude-haiku-4-5-20251001 Official notice Details
2024-11-06Retired, 707 days ago claude-1.1 Replace with claude-haiku-4-5-20251001 Official notice Details
2024-11-06Retired, 707 days ago claude-1.2 Replace with claude-haiku-4-5-20251001 Official notice Details
2024-11-06Retired, 707 days ago claude-1.3 Replace with claude-haiku-4-5-20251001 Official notice Details
2024-11-06Retired, 707 days ago claude-instant-1.0 Replace with claude-haiku-4-5-20251001 Official notice Details
2024-11-06Retired, 707 days ago claude-instant-1.1 Replace with claude-haiku-4-5-20251001 Official notice Details
2024-11-06Retired, 707 days ago claude-instant-1.2 Replace with claude-haiku-4-5-20251001 Official notice Details

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