docs: Update AI API privacy and security for VertexAI (#9357)

* docs: update AI API privacy and security for VertexAI

* updates AI Assistant

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Co-authored-by: Michael Irvine <[email protected]>

Author: mjirv

docs/pages/product/apis-integrations/ai-api/privacy-security.mdx

@@ -4,10 +4,10 @@ With Cube’s AI API, your credentials are never shared with AI, and neither is
 
 ## Data Retention Policy
 
-Your data isn’t used by third-party LLMs to train models or improve products. We partner with OpenAI to enforce a strict data retention policy.
+By default, the Cube AI API uses Anthropic models via GCP VertexAI. Your data isn’t used by Google or Anthropic to train models or improve products.
 
-- No data is used for LLM model training or product improvements by third-party LLMs.
-- OpenAI may securely retain API inputs and outputs for up to 30 days for abuse monitoring purposes. Data is permanently deleted after that time.
+- Google does not retain customer data or use it for training or model improvement purposes.
+- Usage is governed by the [Anthropic on Vertex Commercial Terms of Service][ref-anthropic-tos], which specify that Anthropic does not receive access to prompts or outputs and may not train models on customer data.
 
 ## Dynamic grounding with secure data retrieval
 
@@ -24,3 +24,5 @@ Your data isn’t used by third-party LLMs to train models or improve products.
 
 - Data masking policies enforced by Cube are also enforced in AI API usage.
 - You can configure what must and must not be masked in the Cube Semantic Layer.
+
+[ref-anthropic-tos]: https://www-cdn.anthropic.com/471bd07290603ee509a5ea0d5ccf131ea5897232/anthropic-vertex-commercial-terms-march-2024.pdf

docs/pages/product/workspace/ai-assistant.mdx

@@ -110,7 +110,7 @@ See the [AI API's documentation][ref-ai-api-providers] for information on how to
 
 ### 1. What language model(s) does the AI Assistant use?
 
-- The AI Assistant currently uses GPT-4o from OpenAI, but this may change in the future
+- The AI Assistant currently uses Claude 3.5 Sonnet v2 from Anthropic (via Google Cloud), but this may change in the future
 
 ### 2. Are conversations saved or used for training models?