I am testing out the Lead Qualification Agent template and just changing the model from 4o to 4.1 or just the temperature or max tokens and I get this error: Save Failed Failed to save workflow: each value in nodes.model.provider must be one of the following values: openai, anthropic

To resolve the "Save Failed" error, make sure your workflow node's model provider is set to either

openai

or

anthropic

. For example, your node configuration should look like this:

json
{
  "model": {
    "provider": "openai",
    "model": "gpt-4.1-2025-04-14",
    "temperature": 0.7,
    "maxTokens": 1024
  }
}

Double-check that the

provider

field is not empty or set to an unsupported value. This should allow you to save your workflow successfully. Sources: - [Vapi Workflows API Reference Create Workflow](https://docs.vapi.ai/api-reference/workflow/workflow-controller-create?explorer=true) - [Vapi Workflows Quickstart](https://docs.vapi.ai/workflows)

Example Workflow: ad49a12b-c18d-4142-9dec-b7504135e7ca

The error means all workflow nodes must have their model.provider set to either "openai" or "anthropic"; check your JSON payload to ensure correct spelling and configuration before saving the workflow.