Add num_tokens_generated to completion response

aleph_alpha_client/completion.py

@@ -255,6 +255,14 @@ class CompletionResponse:
             Model name and version (if any) of the used model for inference.
         completions:
             List of completions; may contain only one entry if no more are requested (see parameter n).
+        num_tokens_prompt_total:
+            Number of tokens combined across all completion tasks.
+            In particular, if you set best_of or n to a number larger than 1 then we report the
+            combined prompt token count for all best_of or n tasks.
+        num_tokens_generated:
+            Number of tokens combined across all completion tasks.
+            If multiple completions are returned or best_of is set to a value greater than 1 then
+            this value contains the combined generated token count.
         optimized_prompt:
             Describes prompt after optimizations. This field is only returned if the flag
             `disable_optimizations` flag is not set and the prompt has actually changed.
@@ -263,6 +271,7 @@ class CompletionResponse:
     model_version: str
     completions: Sequence[CompletionResult]
     num_tokens_prompt_total: int
+    num_tokens_generated: int
     optimized_prompt: Optional[Prompt] = None
 
     @staticmethod
@@ -274,10 +283,11 @@ def from_json(json: Dict[str, Any]) -> "CompletionResponse":
             completions=[
                 CompletionResult.from_json(item) for item in json["completions"]
             ],
+            num_tokens_prompt_total=json["num_tokens_prompt_total"],
+            num_tokens_generated=json["num_tokens_generated"],
             optimized_prompt=Prompt.from_json(optimized_prompt_json)
             if optimized_prompt_json
             else None,
-            num_tokens_prompt_total=json["num_tokens_prompt_total"],
         )
 
     def to_json(self) -> Mapping[str, Any]:

tests/test_complete.py

@@ -129,7 +129,7 @@ def test_complete_with_echo(sync_client: Client, model_name: str, prompt_image:
     assert len(completion_result.log_probs) > 0
 
 @pytest.mark.system_test
-def test_num_tokes_prompt_total_with_best_of(sync_client: Client, model_name: str):
+def test_num_tokens_prompt_total_with_best_of(sync_client: Client, model_name: str):
     tokens = [49222, 2998] # Hello world
     best_of = 2
     request = CompletionRequest(
@@ -140,3 +140,43 @@ def test_num_tokes_prompt_total_with_best_of(sync_client: Client, model_name: st
 
     response = sync_client.complete(request, model=model_name)
     assert response.num_tokens_prompt_total == len(tokens) * best_of
+
+"""
+curl https://api.aleph-alpha.com/complete -X POST -H "Authorization: Bearer $AA_API_TOKEN" -H "Content-Type: application/json"
+    -d '{ "model": "luminous-base", "prompt": [{ "type": "text", "data": "Hello world"}], "maximum_tokens": 1, "n": 2, "tokens": true }'
+{"completions":
+    [
+      {
+            "completion":"!",
+            "raw_completion":"!",
+            "completion_tokens":["!"],
+            "finish_reason":"maximum_tokens"
+        },
+        {
+            "completion":"!",
+            "raw_completion":"!",
+            "completion_tokens":["!"],
+            "finish_reason":"maximum_tokens"
+        }
+    ],
+    "model_version":"2022-04",
+    "num_tokens_prompt_total":4,
+    "num_tokens_generated":2}
+"""
+
+@pytest.mark.system_test
+def test_num_tokens_generated_with_best_of(sync_client: Client, model_name: str):
+    hello_world = [49222, 2998] # Hello world
+    best_of = 2
+    request = CompletionRequest(
+        prompt = Prompt.from_tokens(hello_world),
+        best_of = best_of,
+        maximum_tokens = 1,
+        tokens = True,
+    )
+
+    response = sync_client.complete(request, model=model_name)
+    completion_result = response.completions[0]
+    number_tokens_completion = len(completion_result.completion_tokens)
+
+    assert response.num_tokens_generated == best_of * number_tokens_completion