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/session.go b/session.go
index 449bf17..db77976 100644
--- a/session.go
+++ b/session.go
@@ -1330,8 +1330,6 @@ type SessionChatParams struct {
 	ModelID    param.Field[string]                  `json:"modelID,required"`
 	Parts      param.Field[[]MessagePartUnionParam] `json:"parts,required"`
 	ProviderID param.Field[string]                  `json:"providerID,required"`
-	// Session ID
-	SessionID param.Field[string] `json:"sessionID,required"`
 }
 
 func (r SessionChatParams) MarshalJSON() (data []byte, err error) {
diff --git a/session_test.go b/session_test.go
index 44fcad8..da9fb82 100644
--- a/session_test.go
+++ b/session_test.go
@@ -123,7 +123,6 @@ func TestSessionChat(t *testing.T) {
 				Type: opencode.F(opencode.TextPartTypeText),
 			}}),
 			ProviderID: opencode.F("providerID"),
-			SessionID:  opencode.F("sessionID"),
 		},
 	)
 	if err != nil {