feat(openai): add reasoning attributes

packages/opentelemetry-instrumentation-openai/opentelemetry/instrumentation/openai/shared/chat_wrappers.py

@@ -285,6 +285,14 @@ async def _handle_request(span, kwargs, instance):
     if Config.enable_trace_context_propagation:
         propagate_trace_context(span, kwargs)
 
+    # Reasoning request attributes
+    reasoning_effort = kwargs.get("reasoning_effort")
+    _set_span_attribute(
+        span,
+        SpanAttributes.LLM_REQUEST_REASONING_EFFORT,
+        reasoning_effort or ()
+    )
+
 
 @dont_throw
 def _handle_response(
@@ -316,6 +324,28 @@ def _handle_response(
     # span attributes
     _set_response_attributes(span, response_dict)
 
+    # Reasoning usage attributes
+    usage = response_dict.get("usage")
+    reasoning_tokens = None
+    if usage:
+        # Support both dict-style and object-style `usage`
+        tokens_details = (
+            usage.get("completion_tokens_details") if isinstance(usage, dict)
+            else getattr(usage, "completion_tokens_details", None)
+        )
+
+        if tokens_details:
+            reasoning_tokens = (
+                tokens_details.get("reasoning_tokens", None) if isinstance(tokens_details, dict)
+                else getattr(tokens_details, "reasoning_tokens", None)
+            )
+
+    _set_span_attribute(
+        span,
+        SpanAttributes.LLM_USAGE_REASONING_TOKENS,
+        reasoning_tokens or 0,
+    )
+
     if should_emit_events():
         if response.choices is not None:
             for choice in response.choices:

packages/opentelemetry-instrumentation-openai/opentelemetry/instrumentation/openai/utils.py

@@ -5,6 +5,7 @@
 import traceback
 from contextlib import asynccontextmanager
 from importlib.metadata import version
+from packaging import version as pkg_version
 
 from opentelemetry import context as context_api
 from opentelemetry._events import EventLogger
@@ -18,7 +19,15 @@
 
 
 def is_openai_v1():
-    return _OPENAI_VERSION >= "1.0.0"
+    return pkg_version.parse(_OPENAI_VERSION) >= pkg_version.parse("1.0.0")
+
+
+def is_reasoning_supported():
+    # Reasoning has been introduced in OpenAI API on Dec 17, 2024
+    #     as per https://platform.openai.com/docs/changelog.
+    # The updated OpenAI library version is 1.58.0
+    #     as per https://pypi.org/project/openai/.
+    return pkg_version.parse(_OPENAI_VERSION) >= pkg_version.parse("1.58.0")
 
 
 def is_azure_openai(instance):

packages/opentelemetry-instrumentation-openai/opentelemetry/instrumentation/openai/v1/responses_wrappers.py

@@ -132,6 +132,11 @@ class TracedData(pydantic.BaseModel):
     request_model: Optional[str] = pydantic.Field(default=None)
     response_model: Optional[str] = pydantic.Field(default=None)
 
+    # Reasoning attributes
+    request_reasoning_summary: Optional[str] = pydantic.Field(default=None)
+    request_reasoning_effort: Optional[str] = pydantic.Field(default=None)
+    response_reasoning_effort: Optional[str] = pydantic.Field(default=None)
+
 
 responses: dict[str, TracedData] = {}
 
@@ -197,7 +202,46 @@ def set_data_attributes(traced_response: TracedData, span: Span):
                 SpanAttributes.LLM_USAGE_CACHE_READ_INPUT_TOKENS,
                 usage.input_tokens_details.cached_tokens,
             )
-        # TODO: add reasoning tokens in output token details
+
+        # Usage - count of reasoning tokens
+        reasoning_tokens = None
+        # Support both dict-style and object-style `usage`
+        tokens_details = (
+            usage.get("output_tokens_details") if isinstance(usage, dict)
+            else getattr(usage, "output_tokens_details", None)
+        )
+
+        if tokens_details:
+            reasoning_tokens = (
+                tokens_details.get("reasoning_tokens", None) if isinstance(tokens_details, dict)
+                else getattr(tokens_details, "reasoning_tokens", None)
+            )
+
+        _set_span_attribute(
+            span,
+            SpanAttributes.LLM_USAGE_REASONING_TOKENS,
+            reasoning_tokens or 0,
+        )
+
+    # Reasoning attributes
+    # Request - reasoning summary
+    _set_span_attribute(
+        span,
+        f"{SpanAttributes.LLM_REQUEST_REASONING_SUMMARY}",
+        traced_response.request_reasoning_summary or (),
+    )
+    # Request - reasoning effort
+    _set_span_attribute(
+        span,
+        f"{SpanAttributes.LLM_REQUEST_REASONING_EFFORT}",
+        traced_response.request_reasoning_effort or (),
+    )
+    # Response - reasoning effort
+    _set_span_attribute(
+        span,
+        f"{SpanAttributes.LLM_RESPONSE_REASONING_EFFORT}",
+        traced_response.response_reasoning_effort or (),
+    )
 
     if should_send_prompts():
         prompt_index = 0
@@ -416,6 +460,18 @@ def responses_get_or_create_wrapper(tracer: Tracer, wrapped, instance, args, kwa
                     "model", existing_data.get("request_model", "")
                 ),
                 response_model=existing_data.get("response_model", ""),
+                # Reasoning attributes
+                request_reasoning_summary=(
+                    kwargs.get("reasoning", {}).get(
+                        "summary", existing_data.get("request_reasoning_summary")
+                    )
+                ),
+                request_reasoning_effort=(
+                    kwargs.get("reasoning", {}).get(
+                        "effort", existing_data.get("request_reasoning_effort")
+                    )
+                ),
+                response_reasoning_effort=kwargs.get("reasoning", {}).get("effort"),
             )
         except Exception:
             traced_data = None
@@ -467,6 +523,18 @@ def responses_get_or_create_wrapper(tracer: Tracer, wrapped, instance, args, kwa
             output_text=existing_data.get("output_text", parsed_response_output_text),
             request_model=existing_data.get("request_model", kwargs.get("model")),
             response_model=existing_data.get("response_model", parsed_response.model),
+            # Reasoning attributes
+            request_reasoning_summary=(
+                kwargs.get("reasoning", {}).get(
+                    "summary", existing_data.get("request_reasoning_summary")
+                )
+            ),
+            request_reasoning_effort=(
+                kwargs.get("reasoning", {}).get(
+                    "effort", existing_data.get("request_reasoning_effort")
+                )
+            ),
+            response_reasoning_effort=kwargs.get("reasoning", {}).get("effort"),
         )
         responses[parsed_response.id] = traced_data
     except Exception:
@@ -518,6 +586,18 @@ async def async_responses_get_or_create_wrapper(
                 output_text=kwargs.get("output_text", existing_data.get("output_text")),
                 request_model=kwargs.get("model", existing_data.get("request_model")),
                 response_model=existing_data.get("response_model"),
+                # Reasoning attributes
+                request_reasoning_summary=(
+                    kwargs.get("reasoning", {}).get(
+                        "summary", existing_data.get("request_reasoning_summary")
+                    )
+                ),
+                request_reasoning_effort=(
+                    kwargs.get("reasoning", {}).get(
+                        "effort", existing_data.get("request_reasoning_effort")
+                    )
+                ),
+                response_reasoning_effort=kwargs.get("reasoning", {}).get("effort"),
             )
         except Exception:
             traced_data = None
@@ -570,6 +650,18 @@ async def async_responses_get_or_create_wrapper(
             output_text=existing_data.get("output_text", parsed_response_output_text),
             request_model=existing_data.get("request_model", kwargs.get("model")),
             response_model=existing_data.get("response_model", parsed_response.model),
+            # Reasoning attributes
+            request_reasoning_summary=(
+                kwargs.get("reasoning", {}).get(
+                    "summary", existing_data.get("request_reasoning_summary")
+                )
+            ),
+            request_reasoning_effort=(
+                kwargs.get("reasoning", {}).get(
+                    "effort", existing_data.get("request_reasoning_effort")
+                )
+            ),
+            response_reasoning_effort=kwargs.get("reasoning", {}).get("effort"),
         )
         responses[parsed_response.id] = traced_data
     except Exception:

packages/opentelemetry-instrumentation-openai/tests/traces/cassettes/test_azure/test_chat_reasoning.yaml

@@ -0,0 +1,81 @@
+interactions:
+- request:
+    body: '{"messages": [{"role": "user", "content": "Count r''s in strawberry"}],
+      "model": "gpt-5-nano", "reasoning_effort": "low"}'
+    headers:
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+  response:
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+
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packages/opentelemetry-instrumentation-openai/tests/traces/cassettes/test_chat/test_chat_reasoning.yaml

@@ -0,0 +1,106 @@
+interactions:
+- request:
+    body: '{"messages": [{"role": "user", "content": "Count r''s in strawberry"}],
+      "model": "gpt-5-nano", "reasoning_effort": "low"}'
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