curl --request POST \
  --url https://api.arize.com/v2/evaluators/{evaluator_id}/versions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "commit_message": "Improve template wording",
  "template_config": {
    "name": "hallucination",
    "template": "Evaluate whether the output is factually grounded.\n\nInput: {{input}}\nOutput: {{output}}",
    "include_explanations": true,
    "use_function_calling_if_available": true,
    "classification_choices": {
      "hallucinated": 0,
      "factual": 1
    },
    "direction": "maximize",
    "data_granularity": "span",
    "llm_config": {
      "ai_integration_id": "TGxtSW50ZWdyYXRpb246MTI6YUJjRA==",
      "model_name": "gpt-4o",
      "invocation_parameters": {
        "temperature": 0
      },
      "provider_parameters": {}
    }
  }
}
'

{
  "id": "RXZhbHVhdG9yVmVyc2lvbjoxMTpBYkNk",
  "evaluator_id": "RXZhbHVhdG9yOjEyOmFCY0Q=",
  "commit_hash": "b4c2d0e5f8a3b1629f7d4cc0328g98e2d5f921g3",
  "commit_message": "Improve template wording",
  "template_config": {
    "name": "hallucination",
    "template": "Evaluate whether the output is factually grounded...",
    "include_explanations": true,
    "use_function_calling_if_available": true,
    "classification_choices": {
      "hallucinated": 0,
      "factual": 1
    },
    "direction": "maximize",
    "data_granularity": "span",
    "llm_config": {
      "ai_integration_id": "TGxtSW50ZWdyYXRpb246MTI6YUJjRA==",
      "model_name": "gpt-4o",
      "invocation_parameters": {
        "temperature": 0
      },
      "provider_parameters": {}
    }
  },
  "created_at": "2026-02-17T10:30:00.000Z",
  "created_by_user_id": "VXNlcjoxOm5OYkM="
}