diff --git a/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/CHANGELOG.md b/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/CHANGELOG.md
index eaf43047e..161172dd7 100644
--- a/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/CHANGELOG.md
+++ b/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Fixed
+
+- Keep the Interactions test mocks working with google-genai 2.34, which
+  copies the interaction that `interactions.create` returns with
+  `model_copy` to merge automatic continuation hops.
+
 ## Version 0.9.0 (2026-09-07)
 
 ### Added
diff --git a/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/tests/interactions/util.py b/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/tests/interactions/util.py
index 29a66f8da..17d93879b 100644
--- a/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/tests/interactions/util.py
+++ b/instrumentation-loongsuite/loongsuite-instrumentation-google-genai/tests/interactions/util.py
@@ -21,6 +21,24 @@
 from typing import Any
 
 
+def create_mock_model(**fields: Any) -> Any:
+    """Mock a pydantic model of the Interactions API with these fields.
+
+    Since google-genai 2.34, ``interactions.create`` copies the interaction
+    it returns, and its usage, with ``model_copy(update=...)`` (to merge
+    automatic continuation hops, even for a single hop). On a plain
+    ``MagicMock`` that copy would be a new mock without these fields.
+    """
+    mock = unittest.mock.MagicMock()
+    mock.configure_mock(**fields)
+
+    def model_copy(update: Any = None, **kwargs: Any) -> Any:
+        return create_mock_model(**{**fields, **(update or {})})
+
+    mock.model_copy.side_effect = model_copy
+    return mock
+
+
 def create_mock_interaction(
     interaction_id: str = "test-id",
     model_name: str = "test-model",
@@ -29,11 +47,12 @@ def create_mock_interaction(
     input_tokens: int = 10,
     output_tokens: int = 20,
 ) -> Any:
-    mock_usage = unittest.mock.MagicMock()
-    mock_usage.total_input_tokens = input_tokens
-    mock_usage.total_output_tokens = output_tokens
-    mock_usage.total_thought_tokens = 0
-    mock_usage.total_cached_tokens = 0
+    mock_usage = create_mock_model(
+        total_input_tokens=input_tokens,
+        total_output_tokens=output_tokens,
+        total_thought_tokens=0,
+        total_cached_tokens=0,
+    )
 
     mock_user_step = unittest.mock.MagicMock()
     mock_user_step.type = "user_input"
@@ -47,14 +66,13 @@ def create_mock_interaction(
     mock_model_part.text = output_text
     mock_model_step.content = [mock_model_part]
 
-    mock_interaction = unittest.mock.MagicMock()
-    mock_interaction.id = interaction_id
-    mock_interaction.model = model_name
-    mock_interaction.usage = mock_usage
-    mock_interaction.steps = [mock_user_step, mock_model_step]
-    mock_interaction.output_text = output_text
-
-    return mock_interaction
+    return create_mock_model(
+        id=interaction_id,
+        model=model_name,
+        usage=mock_usage,
+        steps=[mock_user_step, mock_model_step],
+        output_text=output_text,
+    )
 
 
 def create_mock_completed_event(interaction: Any) -> Any:
diff --git a/util/opentelemetry-util-genai/CHANGELOG-loongsuite.md b/util/opentelemetry-util-genai/CHANGELOG-loongsuite.md
index 6a392610a..bb48072eb 100644
--- a/util/opentelemetry-util-genai/CHANGELOG-loongsuite.md
+++ b/util/opentelemetry-util-genai/CHANGELOG-loongsuite.md
@@ -14,6 +14,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   event coverage, Provider setup, context lifetimes, and version troubleshooting.
   Present GenAI Utils as a standalone library configured through the OpenTelemetry
   SDK, with optional storage backends separate from the setup guide.
+- Fix the API docs build: Sphinx read the "Streaming:" prefix of the
+  `InvokeAgentInvocation.monotonic_first_token_s` docstring as a type and
+  failed on the missing `Streaming` class.
 
 ## Version 0.9.0 (2026-09-07)
 
diff --git a/util/opentelemetry-util-genai/src/opentelemetry/util/genai/extended_types.py b/util/opentelemetry-util-genai/src/opentelemetry/util/genai/extended_types.py
index d74131cf9..b488dd997 100644
--- a/util/opentelemetry-util-genai/src/opentelemetry/util/genai/extended_types.py
+++ b/util/opentelemetry-util-genai/src/opentelemetry/util/genai/extended_types.py
@@ -206,7 +206,9 @@ class InvokeAgentInvocation:
     monotonic_start_s: float | None = None
     monotonic_end_s: float | None = None
     monotonic_first_token_s: float | None = None
-    """Streaming: first-token time; TTFT attribute derived like ``LLMInvocation``."""
+    """Monotonic time when the first token of a streaming response arrived.
+    The time-to-first-token attribute is derived from it as for
+    ``LLMInvocation``."""
 
 
 @dataclass