fix: restore legacy provider field names for backward compatibility

Keep old provider-specific field names (anthropic.cache_*, openai.*,
completion/*, prompt/*) alongside the new OTel-standard field names
so existing integrations that depend on the legacy keys continue to work.

Author: hanhan761

python/packages/anthropic/agent_framework_anthropic/_chat_client.py

@@ -1023,8 +1023,10 @@ def _parse_usage_from_anthropic(self, usage: BetaUsage | BetaMessageDeltaUsage |
         if usage.input_tokens is not None:
             usage_details["input_token_count"] = usage.input_tokens
         if usage.cache_creation_input_tokens is not None:
+            usage_details["anthropic.cache_creation_input_tokens"] = usage.cache_creation_input_tokens  # type: ignore[typeddict-unknown-key]
             usage_details["cache_creation_input_token_count"] = usage.cache_creation_input_tokens
         if usage.cache_read_input_tokens is not None:
+            usage_details["anthropic.cache_read_input_tokens"] = usage.cache_read_input_tokens  # type: ignore[typeddict-unknown-key]
             usage_details["cache_read_input_token_count"] = usage.cache_read_input_tokens
         return usage_details
 

python/packages/anthropic/tests/test_anthropic_client.py

@@ -2352,6 +2352,8 @@ def test_parse_usage_with_cache_tokens(mock_anthropic_client: MagicMock) -> None
     assert result is not None
     assert result["output_token_count"] == 50
     assert result["input_token_count"] == 100
+    assert result["anthropic.cache_creation_input_tokens"] == 20
+    assert result["anthropic.cache_read_input_tokens"] == 30
     assert result["cache_creation_input_token_count"] == 20
     assert result["cache_read_input_token_count"] == 30
 

python/packages/openai/agent_framework_openai/_chat_client.py

@@ -2980,8 +2980,10 @@ def _parse_usage_from_openai(self, usage: ResponseUsage) -> UsageDetails | None:
             total_token_count=usage.total_tokens,
         )
         if usage.input_tokens_details and usage.input_tokens_details.cached_tokens:
+            details["openai.cached_input_tokens"] = usage.input_tokens_details.cached_tokens  # type: ignore[typeddict-unknown-key]
             details["cache_read_input_token_count"] = usage.input_tokens_details.cached_tokens
         if usage.output_tokens_details and usage.output_tokens_details.reasoning_tokens:
+            details["openai.reasoning_tokens"] = usage.output_tokens_details.reasoning_tokens  # type: ignore[typeddict-unknown-key]
             details["reasoning_output_token_count"] = usage.output_tokens_details.reasoning_tokens
         return details
 

python/packages/openai/agent_framework_openai/_chat_completion_client.py

@@ -766,13 +766,15 @@ def _parse_usage_from_openai(self, usage: CompletionUsage) -> UsageDetails:
             if tokens := usage.completion_tokens_details.audio_tokens:
                 details["completion/audio_tokens"] = tokens  # type: ignore[typeddict-unknown-key]
             if tokens := usage.completion_tokens_details.reasoning_tokens:
+                details["completion/reasoning_tokens"] = tokens  # type: ignore[typeddict-unknown-key]
                 details["reasoning_output_token_count"] = tokens
             if tokens := usage.completion_tokens_details.rejected_prediction_tokens:
                 details["completion/rejected_prediction_tokens"] = tokens  # type: ignore[typeddict-unknown-key]
         if usage.prompt_tokens_details:
             if tokens := usage.prompt_tokens_details.audio_tokens:
                 details["prompt/audio_tokens"] = tokens  # type: ignore[typeddict-unknown-key]
             if tokens := usage.prompt_tokens_details.cached_tokens:
+                details["prompt/cached_tokens"] = tokens  # type: ignore[typeddict-unknown-key]
                 details["cache_read_input_token_count"] = tokens
         return details
 

python/packages/openai/tests/openai/test_openai_chat_client.py

@@ -3300,6 +3300,7 @@ def test_usage_details_with_cached_tokens() -> None:
     details = client._parse_usage_from_openai(mock_usage)  # type: ignore
     assert details is not None
     assert details["input_token_count"] == 200
+    assert details["openai.cached_input_tokens"] == 25
     assert details["cache_read_input_token_count"] == 25
 
 
@@ -3318,6 +3319,7 @@ def test_usage_details_with_reasoning_tokens() -> None:
     details = client._parse_usage_from_openai(mock_usage)  # type: ignore
     assert details is not None
     assert details["output_token_count"] == 80
+    assert details["openai.reasoning_tokens"] == 30
     assert details["reasoning_output_token_count"] == 30
 
 

python/samples/02-agents/tools/function_tool_declaration_only.py

@@ -69,6 +69,7 @@ async def main():
     "input_token_count": 63,
     "output_token_count": 145,
     "total_token_count": 208,
+    "openai.reasoning_tokens": 128,
     "reasoning_output_token_count": 128
   },
   "additional_properties": {}