Obituaries · Anthropic
claude-3-5-sonnet-latest, ?–2025
Retired by Anthropic
claude-3-5-sonnet-latest, an Anthropic model that answered questions, wrote emails and was blamed for both, was switched off on October 28, 2025. Notice was given on August 13, 2025, 2 months ahead, in the usual way: a table row on a documentation page. Requests addressed to it are expected to come back unanswered.
Its work passes to claude-sonnet-5-5, which the family describes as 'recommended'.
Last seen alive
In a scan of the 60 most-starred LLM repositories on GitHub (November 5, 2026), this code still names it:
- unclecode/crawl4ai (86,931 stars) ·
crawl4ai/legacy/llmtxt.py
| Model ID | claude-3-5-sonnet-latest |
|---|---|
| Provider | Anthropic deprecations page |
| Announced | August 13, 2025 |
| Shut down | October 28, 2025 |
| Successor | claude-sonnet-5-5 |
In lieu of flowers
Replace the string. Search your code for claude-3-5-sonnet-latest and swap it for claude-sonnet-5-5, or paste a repo into Model Graveyard Check to find every dead model at once.
Want to say something to it? Leave a letter on the farewell wall.
Badge for your README
[](https://lira-ia.github.io/obituaries/claude-3-5-sonnet-latest/)
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Technical notice, with a code scanner: claude-3-5-sonnet-latest on Model Graveyard Check