Migrating off claude-1.3 — retirement date and replacement
Source last checked: 2026-10-26.
Anthropic is retiring claude-1.3 on 2024-11-06. The provider’s documented replacement is claude-haiku-4-5-20251001. This page is built from Anthropic’s official deprecation notice and is rechecked weekly; the source link is below.
Past scheduled retirement. The published shutdown date has passed; this is a historical notice, not a live availability check.
When is claude-1.3 being deprecated?
| Model | Provider | Retires | Replacement |
|---|---|---|---|
| claude-1.3 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
Source: Anthropic deprecation notice · announced 2024-09-04
Test before switching
- Check the replacement's supported API endpoints and request parameters.
- Test your prompts, structured output, streaming and tool calls on staging.
- Compare quality, latency, pricing and rate limits on your workload.
- Keep a rollback path while the old model remains available.
Download retirement dates for your models.
What should I migrate claude-1.3 to?
Anthropic documents claude-haiku-4-5-20251001 as the successor. This is not a compatibility guarantee: request parameters, API endpoints, pricing, tool calls and output behaviour may differ. Check the linked provider documentation and run your own workload before switching.
Measured latency of the Anthropic API host
| Region | p50 TTFB | p95 | Uptime | Probes |
|---|---|---|---|---|
| Asia (Tokyo) | 223 ms | 296 ms | 100% | 288 |
| Europe (Germany) | 167 ms | 186 ms | 100% | 288 |
| South America (São Paulo) | 196 ms | 245 ms | 100% | 288 |
| US (Central) | 92 ms | 157 ms | 100% | 288 |
Edge latency to the provider’s API host over the last 24 hours, measured from 4 regions. This measures the endpoint, not the model: swapping models on the same host is not an inference benchmark or a promise about the replacement model. Compare edge latency
What else retires on 2024-11-06?
| Model | Provider | Retires | Replacement |
|---|---|---|---|
| claude-1.0 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
| claude-1.1 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
| claude-1.2 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
| claude-instant-1.0 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
| claude-instant-1.1 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
| claude-instant-1.2 | Anthropic | 2024-11-06 | claude-haiku-4-5-20251001 |
These models share a shutdown date. Plan each affected integration before that deadline.
Other Anthropic models being retired
| Model | Provider | Retires | Replacement |
|---|---|---|---|
| claude-opus-4-1-20250805 | Anthropic | 2026-08-05 | claude-opus-4-8 |
| claude-opus-4-20250514 | Anthropic | 2026-06-15 | claude-opus-4-8 |
| claude-sonnet-4-5-20250929 | Anthropic | 2026-11-30 | claude-sonnet-5-5 |
| claude-sonnet-4-20250514 | Anthropic | 2026-06-15 | claude-sonnet-5-5 |
| claude-3-7-sonnet-20250219 | Anthropic | 2026-02-19 | claude-sonnet-5-5 |
| claude-3-5-haiku-20241022 | Anthropic | 2026-02-19 | claude-haiku-4-5-20251001 |
| claude-3-haiku-20240307 | Anthropic | 2026-04-20 | claude-haiku-4-5-20251001 |
| claude-3-5-sonnet-20240620 | Anthropic | 2025-10-28 | claude-sonnet-5-5 |
How is this calendar maintained?
Entries are pulled from provider documentation by an automated weekly job and every one carries a link to its source. Nothing is inferred from blog posts or social media. When a provider changes a date, the change appears here after the next run and is visible in the changelog. The full calendar across all providers is on the deprecations page, and this provider’s own list is at Anthropic deprecations.