diff --git a/packages/app/src/lib/catalog/data-mappings.test.ts b/packages/app/src/lib/catalog/data-mappings.test.ts
index 07821f416..a943406bf 100644
--- a/packages/app/src/lib/catalog/data-mappings.test.ts
+++ b/packages/app/src/lib/catalog/data-mappings.test.ts
@@ -20,7 +20,6 @@ import {
   isSequenceDeprecated,
   isSequenceDeprecatedForModel,
   isSequenceHiddenForModel,
-  getModelDefaultPrecisions,
   getSequenceCategoryForModel,
   isBestPerSkuDefaultOff,
   showsTcoBasisSelector,
@@ -480,17 +479,3 @@ describe('isSequenceHiddenForModel', () => {
     expect(isSequenceHiddenForModel(Model.MiniMax_M3, Sequence.EightK_OneK)).toBe(false);
   });
 });
-
-describe('getModelDefaultPrecisions', () => {
-  it('opens GLM-5.2 / GLM-5.3 Agentic coding on FP4 and FP8', () => {
-    expect(getModelDefaultPrecisions(Model.GLM_5_2, Sequence.AgenticTraces)).toEqual([
-      Precision.FP4,
-      Precision.FP8,
-    ]);
-  });
-
-  it('leaves other scenarios and models on the auto default', () => {
-    expect(getModelDefaultPrecisions(Model.GLM_5_2, Sequence.EightK_OneK)).toBeUndefined();
-    expect(getModelDefaultPrecisions(Model.Qwen3_5, Sequence.AgenticTraces)).toBeUndefined();
-  });
-});
diff --git a/packages/app/src/lib/catalog/data-mappings.ts b/packages/app/src/lib/catalog/data-mappings.ts
index 742902192..045cd745d 100644
--- a/packages/app/src/lib/catalog/data-mappings.ts
+++ b/packages/app/src/lib/catalog/data-mappings.ts
@@ -686,6 +686,7 @@ export function getPrecisionLabel(precision: Precision): string {
  * manual toggle still wins; precisions the scenario lacks are dropped.
  *
  * GLM-5.2 / GLM-5.3 Agentic coding: FP4 and FP8 both carry full fleets.
+ * Qwen3.5 397B Agentic coding: same; FP4 and FP8 both carry full fleets.
  *
  * Declared after `Precision`: TypeScript enums are initialised in module order.
  */
@@ -693,6 +694,7 @@ const MODEL_DEFAULT_PRECISIONS: Partial<
   Record<Model, Partial<Record<Sequence, readonly Precision[]>>>
 > = {
   [Model.GLM_5_2]: { [Sequence.AgenticTraces]: [Precision.FP4, Precision.FP8] },
+  [Model.Qwen3_5]: { [Sequence.AgenticTraces]: [Precision.FP4, Precision.FP8] },
 };
 
 /** The fixed default precision set for this model and scenario, if any. */