To accessexternally-hosted models, such as a large language model (LLM) hosted on AWS, theModel Builderin Salesforce is the appropriate tool.Model Builderallows teams to integrate and deploy external AI models into the Salesforce platform, making it possible to leverage models hosted outside of Salesforce infrastructure while still benefiting from the platform's native AI capabilities.

Option B, App Builder, is primarily used to build and configure applications in Salesforce, not to integrate AI models.

Option C, Copilot Builder, focuses on building assistant-like tools rather than integrating external AI models.

Model Builder enables seamless integration with external systems and models, allowing Salesforce users to use external LLMs for generating AI-driven insights and automation.

Salesforce Agentforce Specialist References:

For more details, check the Model Builder guide here:https://help.salesforce.com/s/articleView?id=sf.model_builder_external_models.htm