diff --git a/model/parsers/qwen3coder.go b/model/parsers/qwen3coder.go
index 84636bdc6a..bfa9762c1c 100644
--- a/model/parsers/qwen3coder.go
+++ b/model/parsers/qwen3coder.go
@@ -276,7 +276,14 @@ func parseToolCall(raw qwenEventRawToolCall, tools []api.Tool) (api.ToolCall, er
 		var paramType api.PropertyType
 		if matchedTool != nil && matchedTool.Function.Parameters.Properties != nil {
 			if prop, ok := matchedTool.Function.Parameters.Properties[parameter.Name]; ok {
-				paramType = prop.Type
+				// Handle anyOf by collecting all types from the union
+				if len(prop.AnyOf) > 0 {
+					for _, anyOfProp := range prop.AnyOf {
+						paramType = append(paramType, anyOfProp.Type...)
+					}
+				} else {
+					paramType = prop.Type
+				}
 			}
 		}
 
diff --git a/model/parsers/qwen3coder_test.go b/model/parsers/qwen3coder_test.go
index 3756b4bac7..e4246abcd1 100644
--- a/model/parsers/qwen3coder_test.go
+++ b/model/parsers/qwen3coder_test.go
@@ -977,6 +977,21 @@ func TestQwenToolCallValueParsing(t *testing.T) {
 			raw:       "123",
 			want:      123, // Integer has higher precedence than string
 		},
+		{
+			desc:      "anyOf array or string - with array of objects",
+			paramType: api.PropertyType{"array", "string"},
+			raw:       `[{"content": "task 1", "status": "pending", "priority": "high", "id": "1"}, {"content": "task 2", "status": "completed", "priority": "low", "id": "2"}]`,
+			want: []any{
+				map[string]any{"content": "task 1", "status": "pending", "priority": "high", "id": "1"},
+				map[string]any{"content": "task 2", "status": "completed", "priority": "low", "id": "2"},
+			},
+		},
+		{
+			desc:      "anyOf array or string - with plain string",
+			paramType: api.PropertyType{"array", "string"},
+			raw:       "Error: could not load data",
+			want:      "Error: could not load data",
+		},
 	}
 
 	for _, tc := range cases {