diff --git a/python/python/lancedb/functions.py b/python/python/lancedb/functions.py
index 33a67b413..dd8cecfa9 100644
--- a/python/python/lancedb/functions.py
+++ b/python/python/lancedb/functions.py
@@ -25,7 +25,6 @@ import re
 import sys
 import textwrap
 import types
-import uuid
 from collections.abc import Mapping
 from datetime import date, datetime
 from typing import (
@@ -276,7 +275,7 @@ class FunctionVersion(_RemoteValue):
 
         Every input must be a direct [lancedb.col][lancedb.expr.col]
         reference. The returned application is immutable and retains a
-        named-struct output as one sibling group, so every row's sibling values
+        named-struct output as one binding, so every row's sibling values
         come from one logical Function evaluation. Map result fields to table
         columns with
         [FunctionApplication.rename][lancedb.functions.FunctionApplication.rename],
@@ -326,7 +325,6 @@ class FunctionVersion(_RemoteValue):
             function=FunctionVersionRef(name=self.name, version=self.version),
             inputs=tuple(bindings),
             output=self.signature.output,
-            group_id=f"fg_{uuid.uuid4().hex}",
         )
 
 
@@ -370,7 +368,7 @@ class ApplicationInput(_OpenRemoteValue):
 class FunctionApplication(_OpenRemoteValue):
     """Immutable pre-declaration application of an exact Function version.
 
-    A named-struct output remains one grouped application through table
+    A named-struct output remains one application through table
     declaration and execution.
     [FunctionApplication.rename][lancedb.functions.FunctionApplication.rename]
     records the result-field to table-column mapping without splitting sibling
@@ -380,7 +378,6 @@ class FunctionApplication(_OpenRemoteValue):
     function: FunctionVersionRef
     inputs: tuple[ApplicationInput, ...]
     output: FunctionOutput
-    group_id: str
     columns: Mapping[str, str] = Field(default_factory=dict)
 
     def _known_dict(self) -> dict[str, Any]:
@@ -452,12 +449,10 @@ class OutputMapping(_RemoteValue):
 
 
 class FunctionBinding(_RemoteValue):
-    """Immutable grouped binding persisted by the Enterprise table service."""
+    """Immutable Function binding persisted by the Enterprise table service."""
 
     binding_id: str
-    revision: _UInt64
     function: FunctionVersionRef
-    group_id: str
     inputs: tuple[InputBinding, ...]
     outputs: tuple[OutputMapping, ...]
     input_schema: Optional[Mapping[str, Any]] = None
diff --git a/python/python/lancedb/table.py b/python/python/lancedb/table.py
index 75b7b1db8..fe25d5353 100644
--- a/python/python/lancedb/table.py
+++ b/python/python/lancedb/table.py
@@ -1972,7 +1972,7 @@ class Table(ABC):
             A mapping with one ``FunctionApplication`` value keeps its scalar
             or named-struct result in the named table column. A bare
             named-struct application expands its ordered result fields as one
-            atomic sibling group; aliases come from ``rename(columns=...)``.
+            atomic binding; aliases come from ``rename(columns=...)``.
             Function columns are supported only on LanceDB Cloud and
             Enterprise.
         computed: Dict[str, str], optional
@@ -6038,7 +6038,7 @@ class AsyncTable:
             A mapping with one ``FunctionApplication`` value keeps its scalar
             or named-struct result in the named table column. A bare
             named-struct application expands its ordered result fields as one
-            atomic sibling group; aliases come from ``rename(columns=...)``.
+            atomic binding; aliases come from ``rename(columns=...)``.
             Function columns are supported only on LanceDB Cloud and
             Enterprise.
         computed: Dict[str, str], optional
@@ -6075,7 +6075,7 @@ class AsyncTable:
                 isinstance(value, FunctionApplication) for value in transforms.values()
             ):
                 raise ValueError(
-                    "one add_columns call declares exactly one Function sibling group"
+                    "one add_columns call declares exactly one Function binding"
                 )
             function_output_name, function_application = next(iter(transforms.items()))
 
diff --git a/python/python/tests/test_first_class_function_slice1.py b/python/python/tests/test_first_class_function_slice1.py
index 1bb8feaf4..ca0b30ede 100644
--- a/python/python/tests/test_first_class_function_slice1.py
+++ b/python/python/tests/test_first_class_function_slice1.py
@@ -121,7 +121,7 @@ def test_function_version_identity_is_immutable_and_exact():
     assert FunctionVersion(**changed) != version
 
 
-def test_function_version_binds_named_columns_as_one_immutable_group():
+def test_function_version_binds_named_columns_as_one_immutable_application():
     version = FunctionVersion.from_json(
         json.dumps(job_result("remote_function_job.json"))
     )
@@ -131,13 +131,10 @@ def test_function_version_binds_named_columns_as_one_immutable_group():
     assert application.function.name == version.name
     assert application.function.version == version.version
     assert application.output is version.signature.output
-    assert application.group_id.startswith("fg_")
     assert [
         (value.parameter, value.kind, value.value["path"])
         for value in application.inputs
     ] == [("text", "column", "documents.body")]
-    with pytest.raises((TypeError, ValueError)):
-        application.group_id = "fg_changed"
 
 
 def test_function_version_binding_validates_names_and_direct_columns():
@@ -156,7 +153,7 @@ def test_function_version_binding_validates_names_and_direct_columns():
 def test_function_version_keeps_named_struct_outputs_in_one_application():
     value = job_result("remote_function_job.json")
     value["name"] = "text_features"
-    value["version"] = "fv_grouped"
+    value["version"] = "fv_multi_output"
     value["signature"] = {
         "inputs": [
             {"name": "title", "arrow_type": "utf8", "nullable": True},
@@ -221,7 +218,6 @@ def test_function_application_uses_rename_columns_only():
     assert application.columns["normalized_text"] == "search_text"
     assert renamed.columns["normalized_text"] == "body_normalized"
     assert renamed.function == application.function
-    assert renamed.group_id == application.group_id
     assert not hasattr(application, "rename_outputs")
     with pytest.raises(TypeError, match="immutable"):
         renamed.columns["normalized_text"] = "changed"
@@ -242,7 +238,6 @@ def test_function_application_uses_rename_columns_only():
 
 def test_binding_and_refresh_result_keep_stable_remote_fields():
     binding = FunctionBinding.from_json(fixture("remote_function_binding.json"))
-    assert binding.revision == 3
     assert binding.function.version == "fv_01K3TEXT"
     assert [output.output_ordinal for output in binding.outputs] == [0, 1]
     assert binding.input_schema is not None
@@ -322,7 +317,7 @@ def known_application() -> FunctionApplication:
 
 
 @pytest.mark.asyncio
-async def test_add_columns_routes_struct_as_one_and_grouped_expansion_atomically():
+async def test_add_columns_routes_struct_as_one_and_multi_output_binding_atomically():
     inner = _FunctionDeclarationInner()
     table = AsyncTable(inner)
     application = known_application()
@@ -343,12 +338,12 @@ async def test_add_columns_routes_struct_as_one_and_grouped_expansion_atomically
 
 
 @pytest.mark.asyncio
-async def test_add_columns_rejects_mixed_groups_and_unknown_newer_application():
+async def test_add_columns_rejects_multiple_bindings_and_unknown_newer_application():
     inner = _FunctionDeclarationInner()
     table = AsyncTable(inner)
     application = known_application()
 
-    with pytest.raises(ValueError, match="exactly one Function sibling group"):
+    with pytest.raises(ValueError, match="exactly one Function binding"):
         await table.add_columns({"a": application, "b": application})
 
     future = json.loads(fixture("remote_function_application.json"))
@@ -376,7 +371,6 @@ def test_rename_requires_named_struct_and_keeps_partial_mapping_immutable():
                     "arrow_type": "list<float32>",
                     "nullable": False,
                 },
-                "group_id": "fg_scalar",
             }
         )
     )
diff --git a/rust/lancedb/src/function.rs b/rust/lancedb/src/function.rs
index f02158871..433a7e04c 100644
--- a/rust/lancedb/src/function.rs
+++ b/rust/lancedb/src/function.rs
@@ -446,7 +446,6 @@ pub struct FunctionApplication {
     function: FunctionVersionRef,
     inputs: Vec<ApplicationInput>,
     output: FunctionOutput,
-    group_id: String,
     #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
     columns: BTreeMap<String, String>,
     #[serde(default, flatten, skip_serializing)]
@@ -468,10 +467,6 @@ impl FunctionApplication {
         &self.output
     }
 
-    pub fn group_id(&self) -> &str {
-        &self.group_id
-    }
-
     pub fn columns(&self) -> &BTreeMap<String, String> {
         &self.columns
     }
@@ -513,7 +508,7 @@ pub struct InputBinding {
     pub nullable: bool,
 }
 
-/// Ordered result-field to table-field mapping for a grouped binding.
+/// Ordered result-field to table-field mapping for a Function binding.
 ///
 /// Assignment state is not part of the Slice 1 client contract. During the
 /// NULL transition there is no public Lance cell-flag identifier to persist.
@@ -527,20 +522,18 @@ pub struct OutputMapping {
     pub nullable: bool,
 }
 
-/// Immutable grouped binding persisted by the Enterprise table service.
+/// Immutable Function binding persisted by the Enterprise table service.
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct FunctionBinding {
     binding_id: String,
-    revision: u64,
     function: FunctionVersionRef,
-    group_id: String,
     inputs: Vec<InputBinding>,
     outputs: Vec<OutputMapping>,
     /// Exact Arrow schema presented to the Function, encoded with the Lance
     /// Namespace Arrow JSON representation.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     input_schema: Option<Value>,
-    /// Exact physical Arrow schema of the grouped table outputs.
+    /// Exact physical Arrow schema of the binding's table outputs.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     output_schema: Option<Value>,
 }
@@ -550,18 +543,10 @@ impl FunctionBinding {
         &self.binding_id
     }
 
-    pub fn revision(&self) -> u64 {
-        self.revision
-    }
-
     pub fn function(&self) -> &FunctionVersionRef {
         &self.function
     }
 
-    pub fn group_id(&self) -> &str {
-        &self.group_id
-    }
-
     pub fn inputs(&self) -> &[InputBinding] {
         &self.inputs
     }
diff --git a/rust/lancedb/src/query.rs b/rust/lancedb/src/query.rs
index b2c5fefbe..654777adb 100644
--- a/rust/lancedb/src/query.rs
+++ b/rust/lancedb/src/query.rs
@@ -1774,11 +1774,14 @@ mod tests {
             .postfilter();
         let result = query.execute().await;
         let mut stream = result.expect("should have result");
-        // should only have one batch
+        let mut num_rows = 0;
         while let Some(batch) = stream.next().await {
-            // post filter should have removed some rows
-            assert!(batch.expect("should be Ok").num_rows() < 10);
+            let batch = batch.expect("should be Ok");
+            let ids: &Int32Array = batch["id"].as_primitive();
+            assert!(ids.iter().all(|id| id.unwrap() % 2 == 0));
+            num_rows += batch.num_rows();
         }
+        assert!(num_rows <= 10);
 
         let query = table
             .query()
diff --git a/rust/lancedb/src/remote/table.rs b/rust/lancedb/src/remote/table.rs
index 35ac56970..742ab547d 100644
--- a/rust/lancedb/src/remote/table.rs
+++ b/rust/lancedb/src/remote/table.rs
@@ -6787,8 +6787,7 @@ mod tests {
             r#"{
                 "function":{"name":"embed","version":"fv_01K3EXACT"},
                 "inputs":[{"parameter":"text","kind":"column","value":{"path":"description"}}],
-                "output":{"kind":"scalar","arrow_type":"list<float32>","nullable":false},
-                "group_id":"fg_scalar"
+                "output":{"kind":"scalar","arrow_type":"list<float32>","nullable":false}
             }"#,
         )
         .unwrap();
@@ -6834,8 +6833,7 @@ mod tests {
             r#"{
                 "function":{"name":"embed","version":"fv_01K3EXACT"},
                 "inputs":[{"parameter":"text","kind":"column","value":{"path":"description"}}],
-                "output":{"kind":"scalar","arrow_type":"fixed_size_list<float32, 3>","nullable":false},
-                "group_id":"fg_fixed"
+                "output":{"kind":"scalar","arrow_type":"fixed_size_list<float32, 3>","nullable":false}
             }"#,
         )
         .unwrap();
@@ -6850,7 +6848,7 @@ mod tests {
     }
 
     #[tokio::test]
-    async fn test_add_named_struct_function_expands_one_atomic_sibling_group() {
+    async fn test_add_named_struct_function_expands_one_atomic_binding() {
         let table = Table::new_with_handler("my_table", |request| match request.url().path() {
             "/v1/table/my_table/describe/" => http::Response::builder()
                 .status(200)
@@ -6865,7 +6863,7 @@ mod tests {
                 let actual: serde_json::Value =
                     serde_json::from_slice(request.body().unwrap().as_bytes().unwrap()).unwrap();
                 let expected: serde_json::Value = serde_json::from_str(include_str!(
-                    "../../tests/fixtures/first_class_functions/v1/remote_grouped_declaration_request.json"
+                    "../../tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json"
                 ))
                 .unwrap();
                 assert_eq!(actual, expected);
@@ -6887,7 +6885,6 @@ mod tests {
                     {"name":"normalized_text","arrow_type":"utf8","nullable":false},
                     {"name":"token_count","arrow_type":"int64","nullable":false}
                 ]},
-                "group_id":"fg_01K3TEXT",
                 "columns":{"normalized_text":"search_text"}
             }"#,
         )
diff --git a/rust/lancedb/src/table.rs b/rust/lancedb/src/table.rs
index 356c87bbe..ecd95f161 100644
--- a/rust/lancedb/src/table.rs
+++ b/rust/lancedb/src/table.rs
@@ -751,7 +751,7 @@ pub trait BaseTable: std::fmt::Display + std::fmt::Debug + Send + Sync {
             message: "computed columns are not supported on this table type".into(),
         })
     }
-    /// Declare one immutable registered-Function output group.
+    /// Declare one immutable registered-Function binding.
     async fn add_function_columns(
         &self,
         _application: &crate::function::FunctionApplication,
diff --git a/rust/lancedb/src/table/add_columns.rs b/rust/lancedb/src/table/add_columns.rs
index 3b91c30e4..1ac0c6b4f 100644
--- a/rust/lancedb/src/table/add_columns.rs
+++ b/rust/lancedb/src/table/add_columns.rs
@@ -88,7 +88,7 @@ impl AddColumnsBuilder {
     }
 
     /// Declare every field of a named-struct Function result as one atomic
-    /// sibling group. Result-field aliases come from
+    /// binding. Result-field aliases come from
     /// [`FunctionApplication::columns`](crate::function::FunctionApplication::columns).
     ///
     /// ```
diff --git a/rust/lancedb/src/table/computed_columns.rs b/rust/lancedb/src/table/computed_columns.rs
index 133f37a55..2b95cb34c 100644
--- a/rust/lancedb/src/table/computed_columns.rs
+++ b/rust/lancedb/src/table/computed_columns.rs
@@ -13,7 +13,7 @@
 //! self-describing -- both are derived from the expression, so a caller writes
 //! neither -- while a kind resolved through a registry cannot be typed without
 //! consulting it. Registered Functions use an exact remote version plus a
-//! schema-level grouped binding; unknown newer kinds remain readable and fail
+//! schema-level Function binding; unknown newer kinds remain readable and fail
 //! closed before mutation.
 //!
 //! [`computed_columns`] and [`computed_column_from_field`] read declarations
@@ -46,16 +46,16 @@ pub const EXPRESSION_META_KEY: &str = "computed_column.expression";
 /// Field metadata key holding the column's inputs, as a JSON array of names.
 pub const INPUTS_META_KEY: &str = "computed_column.inputs";
 
-/// Field metadata key holding the grouped Function binding identity.
+/// Field metadata key holding the Function binding identity.
 pub const FUNCTION_BINDING_ID_META_KEY: &str = "computed_column.function.binding_id";
 
 /// Field metadata key holding this sibling's ordered Function output ordinal.
 pub const FUNCTION_OUTPUT_ORDINAL_META_KEY: &str = "computed_column.function.output_ordinal";
 
-/// Schema metadata key holding all immutable grouped Function bindings.
+/// Schema metadata key holding all immutable Function bindings.
 pub const FUNCTION_BINDINGS_META_KEY: &str = "lancedb::function_bindings";
 
-/// Version of the schema-level grouped Function binding envelope.
+/// Version of the schema-level Function binding envelope.
 pub const FUNCTION_BINDINGS_VERSION: u32 = 1;
 
 /// Value of [`KIND_META_KEY`] for a column defined by a SQL expression.
@@ -81,7 +81,7 @@ pub enum ComputedColumnKind {
         /// The expression.
         expression: String,
     },
-    /// One physical output in an immutable grouped registered-Function
+    /// One physical output in an immutable registered-Function
     /// binding. The full binding lives in schema metadata.
     Function {
         /// Shared immutable binding identity.
@@ -159,7 +159,7 @@ struct FunctionBindingEnvelope {
     bindings: Vec<Value>,
 }
 
-/// Encode immutable grouped bindings for schema-level persistence.
+/// Encode immutable Function bindings for schema-level persistence.
 pub fn function_bindings_metadata(bindings: &[FunctionBinding]) -> Result<String> {
     let bindings = bindings
         .iter()
@@ -177,7 +177,7 @@ pub fn function_bindings_metadata(bindings: &[FunctionBinding]) -> Result<String
     })
 }
 
-/// Decode known grouped Function bindings without rewriting their raw schema
+/// Decode known Function bindings without rewriting their raw schema
 /// metadata. Unknown envelope versions fail closed.
 pub fn function_bindings(schema: &ArrowSchema) -> Result<Vec<FunctionBinding>> {
     let Some(envelope) = function_binding_envelope(schema)? else {
@@ -238,21 +238,15 @@ pub(crate) fn ensure_supported_function_metadata(schema: &ArrowSchema) -> Result
                 message: format!("duplicate Function binding '{}'", binding.binding_id()),
             });
         }
-        if binding.revision() == 0 || binding.outputs().is_empty() {
+        if binding.outputs().is_empty() {
             return Err(Error::InvalidInput {
-                message: format!(
-                    "Function binding '{}' has no immutable revision or outputs",
-                    binding.binding_id()
-                ),
+                message: format!("Function binding '{}' has no outputs", binding.binding_id()),
             });
         }
-        if binding.function().name.is_empty()
-            || binding.function().version.is_empty()
-            || binding.group_id().is_empty()
-        {
+        if binding.function().name.is_empty() || binding.function().version.is_empty() {
             return Err(Error::InvalidInput {
                 message: format!(
-                    "Function binding '{}' has no exact version or group identity",
+                    "Function binding '{}' has no exact version",
                     binding.binding_id()
                 ),
             });
@@ -493,9 +487,7 @@ fn ensure_known_binding_shape(value: &Value) -> Result<()> {
         value,
         &[
             "binding_id",
-            "revision",
             "function",
-            "group_id",
             "inputs",
             "outputs",
             "input_schema",
@@ -786,12 +778,9 @@ pub(crate) fn plan_function_application(
             message: "Function application contains fields from a newer contract".into(),
         });
     }
-    if application.function().name.is_empty()
-        || application.function().version.is_empty()
-        || application.group_id().is_empty()
-    {
+    if application.function().name.is_empty() || application.function().version.is_empty() {
         return Err(invalid_function(
-            "Function application requires an exact version and group identity",
+            "Function application requires an exact version",
         ));
     }
 
@@ -2261,7 +2250,6 @@ mod tests {
                     {{"name":"normalized_text","arrow_type":"utf8","nullable":false}},
                     {{"name":"token_count","arrow_type":"int64","nullable":false}}
                 ]}},
-                "group_id":"fg_exact",
                 "columns":{columns}
             }}"#
         ))
@@ -2442,8 +2430,7 @@ mod tests {
             r#"{
                 "function":{"name":"f","version":"fv"},
                 "inputs":[{"parameter":"title","kind":"future_source","value":{"path":"title"}}],
-                "output":{"kind":"scalar","arrow_type":"int64","nullable":false},
-                "group_id":"fg"
+                "output":{"kind":"scalar","arrow_type":"int64","nullable":false}
             }"#,
         )
         .unwrap();
@@ -2456,7 +2443,6 @@ mod tests {
                 "function":{"name":"f","version":"fv"},
                 "inputs":[],
                 "output":{"kind":"scalar","arrow_type":"int64","nullable":false},
-                "group_id":"fg",
                 "future_declaration":{"mode":"managed"}
             }"#,
         )
@@ -2470,8 +2456,7 @@ mod tests {
             r#"{
                 "function":{"name":"f","version":"fv"},
                 "inputs":[],
-                "output":{"kind":"scalar","arrow_type":"int64","nullable":false,"assignment":"cell_flag"},
-                "group_id":"fg"
+                "output":{"kind":"scalar","arrow_type":"int64","nullable":false,"assignment":"cell_flag"}
             }"#,
         )
         .unwrap();
diff --git a/rust/lancedb/tests/first_class_function_slice1.rs b/rust/lancedb/tests/first_class_function_slice1.rs
index dc565d309..aec264650 100644
--- a/rust/lancedb/tests/first_class_function_slice1.rs
+++ b/rust/lancedb/tests/first_class_function_slice1.rs
@@ -84,7 +84,6 @@ fn application_and_binding_match_shared_remote_goldens() {
 
     let binding = FunctionBinding::from_json(&fixture("remote_function_binding.json"))
         .expect("binding fixture");
-    assert_eq!(binding.revision(), 3);
     assert_eq!(binding.function().version, "fv_01K3TEXT");
     assert_eq!(binding.outputs()[0].output_ordinal, 0);
     assert_eq!(binding.outputs()[1].output_ordinal, 1);
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json
index 7d92f1454..fd3944412 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json
@@ -24,8 +24,7 @@
         "kind": "scalar",
         "arrow_type": "fixed_size_list<float32, 3>",
         "nullable": false
-      },
-      "group_id": "fg_fixed"
+      }
     },
     "binding_metadata_version": 1,
     "input_bindings": [
@@ -76,4 +75,4 @@
       }
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json
index 05da9fe39..b91dd1061 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json
@@ -1 +1 @@
-{"columns":{"normalized_text":"search_text","token_count":"search_token_count"},"function":{"name":"text_features","version":"fv_01K3TEXT"},"group_id":"fg_01K3TEXT","inputs":[{"kind":"column","parameter":"title","value":{"path":"title"}},{"kind":"column","parameter":"body","value":{"path":"body"}}],"output":{"fields":[{"arrow_type":"utf8","name":"normalized_text","nullable":false},{"arrow_type":"int64","name":"token_count","nullable":false}],"kind":"named_struct"}}
+{"columns":{"normalized_text":"search_text","token_count":"search_token_count"},"function":{"name":"text_features","version":"fv_01K3TEXT"},"inputs":[{"kind":"column","parameter":"title","value":{"path":"title"}},{"kind":"column","parameter":"body","value":{"path":"body"}}],"output":{"fields":[{"arrow_type":"utf8","name":"normalized_text","nullable":false},{"arrow_type":"int64","name":"token_count","nullable":false}],"kind":"named_struct"}}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json
index 44aeff460..177821aaa 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json
@@ -11,7 +11,6 @@
       {"name": "token_count", "arrow_type": "int64", "nullable": false}
     ]
   },
-  "group_id": "fg_01K3TEXT",
   "columns": {
     "normalized_text": "search_text",
     "token_count": "search_token_count"
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json
index 47724eee0..c23c8f3ca 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json
@@ -3,6 +3,5 @@
   "inputs": [
     {"parameter": "threshold", "kind": "literal", "value": 1e-7}
   ],
-  "output": {"kind": "scalar", "arrow_type": "bool", "nullable": false},
-  "group_id": "fg_01K3FLOAT"
+  "output": {"kind": "scalar", "arrow_type": "bool", "nullable": false}
 }
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json
index 7bf93b8a8..143190f78 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json
@@ -1 +1 @@
-{"binding_id":"fb_01K3TEXT","function":{"name":"text_features","version":"fv_01K3TEXT"},"group_id":"fg_01K3TEXT","input_schema":{"fields":[{"name":"title","nullable":true,"type":{"type":"utf8"}},{"name":"body","nullable":true,"type":{"type":"utf8"}}]},"inputs":[{"arrow_type":"utf8","field_id":11,"field_path":"title","nullable":true,"parameter":"title"},{"arrow_type":"utf8","field_id":12,"field_path":"body","nullable":true,"parameter":"body"}],"output_schema":{"fields":[{"name":"search_text","nullable":true,"type":{"type":"utf8"}},{"name":"search_token_count","nullable":true,"type":{"type":"int64"}}]},"outputs":[{"arrow_type":"utf8","nullable":false,"output_field_id":21,"output_name":"search_text","output_ordinal":0,"result_field":"normalized_text"},{"arrow_type":"int64","nullable":false,"output_field_id":22,"output_name":"search_token_count","output_ordinal":1,"result_field":"token_count"}],"revision":3}
+{"binding_id":"fb_01K3TEXT","function":{"name":"text_features","version":"fv_01K3TEXT"},"input_schema":{"fields":[{"name":"title","nullable":true,"type":{"type":"utf8"}},{"name":"body","nullable":true,"type":{"type":"utf8"}}]},"inputs":[{"arrow_type":"utf8","field_id":11,"field_path":"title","nullable":true,"parameter":"title"},{"arrow_type":"utf8","field_id":12,"field_path":"body","nullable":true,"parameter":"body"}],"output_schema":{"fields":[{"name":"search_text","nullable":true,"type":{"type":"utf8"}},{"name":"search_token_count","nullable":true,"type":{"type":"int64"}}]},"outputs":[{"arrow_type":"utf8","nullable":false,"output_field_id":21,"output_name":"search_text","output_ordinal":0,"result_field":"normalized_text"},{"arrow_type":"int64","nullable":false,"output_field_id":22,"output_name":"search_token_count","output_ordinal":1,"result_field":"token_count"}]}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json
index 1a2053e42..dec3fa3f8 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json
@@ -1,8 +1,6 @@
 {
   "binding_id": "fb_01K3TEXT",
-  "revision": 3,
   "function": {"name": "text_features", "version": "fv_01K3TEXT"},
-  "group_id": "fg_01K3TEXT",
   "inputs": [
     {"parameter": "title", "field_id": 11, "field_path": "title", "arrow_type": "utf8", "nullable": true},
     {"parameter": "body", "field_id": 12, "field_path": "body", "arrow_type": "utf8", "nullable": true}
@@ -23,5 +21,5 @@
       {"name": "search_token_count", "nullable": true, "type": {"type": "int64"}}
     ]
   },
-  "future_binding": {"metadata_revision": 1}
+  "future_binding": {"mode": "managed"}
 }
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_grouped_declaration_request.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json
similarity index 97%
rename from rust/lancedb/tests/fixtures/first_class_functions/v1/remote_grouped_declaration_request.json
rename to rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json
index d0b42cc99..c4ef5009f 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_grouped_declaration_request.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json
@@ -17,7 +17,6 @@
           {"name": "token_count", "arrow_type": "int64", "nullable": false}
         ]
       },
-      "group_id": "fg_01K3TEXT",
       "columns": {"normalized_text": "search_text"}
     },
     "binding_metadata_version": 1,
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_refresh_job.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_refresh_job.json
index bb2490bc8..c2d49827d 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_refresh_job.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_refresh_job.json
@@ -3,7 +3,7 @@
   "job_type": "refresh_function_columns",
   "job_state": "DONE",
   "creation_ms": 1787270400001,
-  "spec": {"table": "documents", "binding_revision": 3},
+  "spec": {"table": "documents", "binding_id": "fb_01K3TEXT"},
   "result": {
     "rows_assigned": 999998800,
     "rows_failed": 0,
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json
index 0aaa0cf72..357834de0 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json
@@ -8,8 +8,7 @@
       "inputs": [
         {"parameter": "text", "kind": "column", "value": {"path": "description"}}
       ],
-      "output": {"kind": "scalar", "arrow_type": "list<float32>", "nullable": false},
-      "group_id": "fg_scalar"
+      "output": {"kind": "scalar", "arrow_type": "list<float32>", "nullable": false}
     },
     "binding_metadata_version": 1,
     "input_bindings": [