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**Description:** Within AzureOpenAIEmbeddings there is a validation to cap `chunk_size` at 16. The value of 16 is either an old limitation or was erroneously chosen. I have checked all of the `preview` and `stable` releases to ensure that the `embeddings` endpoint can handle 2048 entries [Azure/azure-rest-api-specs](https://github.com/Azure/azure-rest-api-specs/tree/main/specification/cognitiveservices/data-plane/AzureOpenAI/inference). I have also found many locations that confirm this limit should be 2048: - https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#embeddings - https://learn.microsoft.com/en-us/azure/ai-services/openai/quotas-limits **Issue:** fixes #25462