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Cohere retired `embed-english-v2.0`, `embed-english-light-v2.0` and `embed-multilingual-v2.0` on April 4, 2026 ([deprecations](https://docs.cohere.com/docs/deprecations), which lists `embed-english-v3.0`, `embed-multilingual-v3.0` and `embed-v4.0` as the embedding alternatives). `CohereEmbeddingFunction` still defaulted to `embed-multilingual-v2.0`, so every call without an explicit `name` fails. The default is now `embed-multilingual-v3.0`, the multilingual v3 model, and the retired models are removed from the docstring and the Cohere integration page (the page also listed `embed-english-v2.0` as the default, which did not match the code). The docs example, its generated snippet, the docs test and the slow Cohere test use the new name. This changes the default vector size: `ndims()` returns 1024 for `embed-multilingual-v3.0`, where the old default gave 768. Tables created from a schema that uses `cohere.ndims()` get 1024-dimension vectors from now on. A table that already holds 768-dimension vectors from the retired model needs a re-embed with a current model, since the old model can no longer be called. The `ndims()` entries for the v2 names are left as they are. Test: `test_cohere_default_model_is_not_a_retired_v2_model` in `python/python/tests/test_embeddings.py` checks the default name and that `ndims()` is 1024. The repository's pytest session could not be run for this change (its `conftest.py` needs a newer native module than the released wheel); the body of that test was run against the released `lancedb` 0.40.0 with this version of `cohere.py` in place, where it passes, and it returns `embed-multilingual-v2.0` / 768 without the change. ruff check and format are clean on the touched Python files. No Cohere request was made. This change was made with Claude Code. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com> Co-authored-by: Xuanwo <github@xuanwo.io>