diff --git a/sentry_sdk/consts.py b/sentry_sdk/consts.py
index 7e7a25f65d..649b21a33b 100644
--- a/sentry_sdk/consts.py
+++ b/sentry_sdk/consts.py
@@ -593,6 +593,12 @@ class SPANDATA:
     Example: [{"role": "assistant", "parts": [{"type": "text", "content": "The weather in Paris is currently rainy with a temperature of 57°F."}], "finish_reason": "stop"}]
     """
 
+    GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK = "gen_ai.response.time_to_first_chunk"
+    """
+    Time in seconds when the first response content chunk arrived in streaming responses.
+    Example: 0.6853435
+    """
+
     GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN = "gen_ai.response.time_to_first_token"
     """
     The time it took to receive the first token from the model.
diff --git a/sentry_sdk/integrations/openai.py b/sentry_sdk/integrations/openai.py
index 48223e7041..5ba27fc840 100644
--- a/sentry_sdk/integrations/openai.py
+++ b/sentry_sdk/integrations/openai.py
@@ -978,7 +978,7 @@ def _wrap_synchronous_completions_chunk_iterator(
     with capture_internal_exceptions():
         if ttft is not None:
             set_data_normalized(
-                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN, ttft
+                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK, ttft
             )
         all_responses = None
         if len(data_buf) > 0:
@@ -1046,7 +1046,7 @@ async def _wrap_asynchronous_completions_chunk_iterator(
     with capture_internal_exceptions():
         if ttft is not None:
             set_data_normalized(
-                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN, ttft
+                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK, ttft
             )
         all_responses = None
         if len(data_buf) > 0:
@@ -1117,7 +1117,7 @@ def _wrap_synchronous_responses_event_iterator(
     with capture_internal_exceptions():
         if ttft is not None:
             set_data_normalized(
-                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN, ttft
+                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK, ttft
             )
         if len(data_buf) > 0:
             all_responses = ["".join(chunk) for chunk in data_buf]
@@ -1187,7 +1187,7 @@ async def _wrap_asynchronous_responses_event_iterator(
     with capture_internal_exceptions():
         if ttft is not None:
             set_data_normalized(
-                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN, ttft
+                span, SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK, ttft
             )
         if len(data_buf) > 0:
             all_responses = ["".join(chunk) for chunk in data_buf]
diff --git a/sentry_sdk/integrations/openai_agents/patches/models.py b/sentry_sdk/integrations/openai_agents/patches/models.py
index 34f5ddf924..2fb72295dc 100644
--- a/sentry_sdk/integrations/openai_agents/patches/models.py
+++ b/sentry_sdk/integrations/openai_agents/patches/models.py
@@ -152,7 +152,7 @@ async def wrapped_stream_response(*args: "Any", **kwargs: "Any") -> "Any":
                     if not ttft_recorded and hasattr(event, "delta"):
                         ttft = time.perf_counter() - start_time
                         span.set_attribute(
-                            SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN, ttft
+                            SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK, ttft
                         )
                         ttft_recorded = True
 
diff --git a/tests/integrations/openai/test_openai.py b/tests/integrations/openai/test_openai.py
index ac90597d13..ba5b2ffb65 100644
--- a/tests/integrations/openai/test_openai.py
+++ b/tests/integrations/openai/test_openai.py
@@ -4991,7 +4991,7 @@ async def test_ai_client_span_streaming_responses_async_api(
         "gen_ai.response.model": "response-model-id",
         "gen_ai.response.streaming": True,
         SPANDATA.GEN_AI_PROVIDER_NAME: "openai",
-        "gen_ai.response.time_to_first_token": mock.ANY,
+        SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK: mock.ANY,
         "gen_ai.usage.input_tokens": 20,
         "gen_ai.usage.input_tokens.cached": 5,
         "gen_ai.usage.output_tokens": 10,
@@ -5481,8 +5481,8 @@ def test_streaming_chat_completion_ttft(
     assert span["attributes"]["sentry.op"] == "gen_ai.chat"
 
     # Verify TTFT is captured
-    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN in span["attributes"]
-    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN]
+    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK in span["attributes"]
+    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK]
 
     assert isinstance(ttft, float)
     assert ttft > 0
@@ -5564,8 +5564,8 @@ async def test_streaming_chat_completion_ttft_async(
     assert span["attributes"]["sentry.op"] == "gen_ai.chat"
 
     # Verify TTFT is captured
-    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN in span["attributes"]
-    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN]
+    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK in span["attributes"]
+    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK]
 
     assert isinstance(ttft, float)
     assert ttft > 0
@@ -5614,8 +5614,8 @@ def test_streaming_responses_api_ttft(
     assert span["attributes"]["sentry.op"] == "gen_ai.responses"
 
     # Verify TTFT is captured
-    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN in span["attributes"]
-    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN]
+    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK in span["attributes"]
+    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK]
 
     assert isinstance(ttft, float)
     assert ttft > 0
@@ -5666,8 +5666,8 @@ async def test_streaming_responses_api_ttft_async(
     assert span["attributes"]["sentry.op"] == "gen_ai.responses"
 
     # Verify TTFT is captured
-    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN in span["attributes"]
-    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN]
+    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK in span["attributes"]
+    ttft = span["attributes"][SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK]
 
     assert isinstance(ttft, float)
     assert ttft > 0
diff --git a/tests/integrations/openai_agents/test_openai_agents.py b/tests/integrations/openai_agents/test_openai_agents.py
index 2bde3ee306..0789d3d2e2 100644
--- a/tests/integrations/openai_agents/test_openai_agents.py
+++ b/tests/integrations/openai_agents/test_openai_agents.py
@@ -4107,7 +4107,7 @@ async def test_streaming_ttft_on_chat_span(
     assert len(chat_spans) >= 1
     chat_span = chat_spans[0]
 
-    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_TOKEN in chat_span["attributes"]
+    assert SPANDATA.GEN_AI_RESPONSE_TIME_TO_FIRST_CHUNK in chat_span["attributes"]
     assert chat_span["attributes"].get(SPANDATA.GEN_AI_RESPONSE_STREAMING) is True