Security guarantees depend on the deployment and provider, but there are some common patterns you can expect from major hosted offerings of Claude Opus 4.5. Typically, data in transit is protected with TLS, and data at rest (logs, request payloads, cached artifacts) is encrypted using modern standards. Enterprise deployments often include options for data residency, VPC peering, private networking, and fine-grained access control so that model calls stay within a controlled trust boundary. On top of that, enterprise SLAs usually include commitments around uptime, incident response, and security monitoring.
Another important dimension is data usage for training. Many providers offer enterprise contracts where customer data is not used to train or fine-tune base models, and logs are retained only for a limited time for abuse detection or debugging. If you’re handling sensitive information — source code, PII, financial data — you should explicitly verify the data usage policy in the contract or product documentation for the environment hosting Claude Opus 4.5. Some environments also support additional protections like customer-managed keys (CMK) or audit logging to satisfy compliance requirements.
If your architecture uses a vector database such as Milvus or Zilliz Cloud as a memory layer, remember that you become responsible for the security of that retrieval layer as well. Embeddings can leak information if not protected properly. You should apply standard security practices: encrypt embeddings at rest, enforce tenant isolation at the collection level, restrict access tokens, and log queries. Claude Opus 4.5 itself only sees the chunks of data you send in the prompt; the design choice of what to store and retrieve via Milvus/Zilliz Cloud is part of your overall security and compliance story.