diff --git a/.stats.yml b/.stats.yml
index 2ab7577..09b6953 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 16
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/opencode%2Fopencode-129afed79c2ff0ae5f660a17af692c0f716b0d61ce62700f107c1d905346793e.yml
-openapi_spec_hash: 4bc73b4bfb67367575ac7b582b77d912
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/opencode%2Fopencode-42c787cc277f295f28cd81a67f7b746cb4d47c3cd4c8a3fb521b03407649ebdd.yml
+openapi_spec_hash: 8f514f7881cf54e0aa65a23366df1af0
 config_hash: 61e8ad6b1bd35aec38a7b20a2570b967
diff --git a/src/opencode_ai/resources/session.py b/src/opencode_ai/resources/session.py
index ff5c246..2434b31 100644
--- a/src/opencode_ai/resources/session.py
+++ b/src/opencode_ai/resources/session.py
@@ -162,7 +162,6 @@ class SessionResource(SyncAPIResource):
         model_id: str,
         parts: Iterable[MessagePartParam],
         provider_id: str,
-        session_id: str,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
         extra_headers: Headers | None = None,
@@ -174,7 +173,7 @@ class SessionResource(SyncAPIResource):
         Create and send a new message to a session
 
         Args:
-          session_id: Session ID
+          id: Session ID
 
           extra_headers: Send extra headers
 
@@ -193,7 +192,6 @@ class SessionResource(SyncAPIResource):
                     "model_id": model_id,
                     "parts": parts,
                     "provider_id": provider_id,
-                    "session_id": session_id,
                 },
                 session_chat_params.SessionChatParams,
             ),
@@ -524,7 +522,6 @@ class AsyncSessionResource(AsyncAPIResource):
         model_id: str,
         parts: Iterable[MessagePartParam],
         provider_id: str,
-        session_id: str,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
         extra_headers: Headers | None = None,
@@ -536,7 +533,7 @@ class AsyncSessionResource(AsyncAPIResource):
         Create and send a new message to a session
 
         Args:
-          session_id: Session ID
+          id: Session ID
 
           extra_headers: Send extra headers
 
@@ -555,7 +552,6 @@ class AsyncSessionResource(AsyncAPIResource):
                     "model_id": model_id,
                     "parts": parts,
                     "provider_id": provider_id,
-                    "session_id": session_id,
                 },
                 session_chat_params.SessionChatParams,
             ),
diff --git a/src/opencode_ai/types/session_chat_params.py b/src/opencode_ai/types/session_chat_params.py
index e7b25d3..ab9cc4a 100644
--- a/src/opencode_ai/types/session_chat_params.py
+++ b/src/opencode_ai/types/session_chat_params.py
@@ -17,6 +17,3 @@ class SessionChatParams(TypedDict, total=False):
     parts: Required[Iterable[MessagePartParam]]
 
     provider_id: Required[Annotated[str, PropertyInfo(alias="providerID")]]
-
-    session_id: Required[Annotated[str, PropertyInfo(alias="sessionID")]]
-    """Session ID"""
diff --git a/tests/api_resources/test_session.py b/tests/api_resources/test_session.py
index 9b2e0b5..01e920c 100644
--- a/tests/api_resources/test_session.py
+++ b/tests/api_resources/test_session.py
@@ -179,7 +179,6 @@ class TestSession:
                 }
             ],
             provider_id="providerID",
-            session_id="sessionID",
         )
         assert_matches_type(Message, session, path=["response"])
 
@@ -196,7 +195,6 @@ class TestSession:
                 }
             ],
             provider_id="providerID",
-            session_id="sessionID",
         )
 
         assert response.is_closed is True
@@ -217,7 +215,6 @@ class TestSession:
                 }
             ],
             provider_id="providerID",
-            session_id="sessionID",
         ) as response:
             assert not response.is_closed
             assert response.http_request.headers.get("X-Stainless-Lang") == "python"
@@ -241,7 +238,6 @@ class TestSession:
                     }
                 ],
                 provider_id="providerID",
-                session_id="sessionID",
             )
 
     @pytest.mark.skip()
@@ -629,7 +625,6 @@ class TestAsyncSession:
                 }
             ],
             provider_id="providerID",
-            session_id="sessionID",
         )
         assert_matches_type(Message, session, path=["response"])
 
@@ -646,7 +641,6 @@ class TestAsyncSession:
                 }
             ],
             provider_id="providerID",
-            session_id="sessionID",
         )
 
         assert response.is_closed is True
@@ -667,7 +661,6 @@ class TestAsyncSession:
                 }
             ],
             provider_id="providerID",
-            session_id="sessionID",
         ) as response:
             assert not response.is_closed
             assert response.http_request.headers.get("X-Stainless-Lang") == "python"
@@ -691,7 +684,6 @@ class TestAsyncSession:
                     }
                 ],
                 provider_id="providerID",
-                session_id="sessionID",
             )
 
     @pytest.mark.skip()