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## Summary - Replace `claude-3-5-haiku-20241022` and `claude-3-7-sonnet-20250219` with `claude-haiku-4-5-20251001` and `claude-sonnet-4-5-20250929` respectively - Both models were retired by Anthropic on February 19, 2026, causing all anthropic integration tests to fail - Updates integration tests, a unit test, and docstring examples in `langchain-core` See: https://platform.claude.com/docs/en/docs/resources/model-deprecations
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