diff --git a/src/shared/model-capabilities/bundled-snapshot.ts b/src/shared/model-capabilities/bundled-snapshot.ts
index 65644a8cf..18ffec737 100644
--- a/src/shared/model-capabilities/bundled-snapshot.ts
+++ b/src/shared/model-capabilities/bundled-snapshot.ts
@@ -1,5 +1,6 @@
 import bundledModelCapabilitiesSnapshotJson from "../../generated/model-capabilities.generated.json"
 
+import { SUPPLEMENTAL_MODEL_CAPABILITIES } from "./supplemental-entries"
 import type { ModelCapabilitiesSnapshot } from "./types"
 
 function normalizeSnapshot(
@@ -8,7 +9,15 @@ function normalizeSnapshot(
 	return snapshot as ModelCapabilitiesSnapshot
 }
 
-const bundledModelCapabilitiesSnapshot = normalizeSnapshot(bundledModelCapabilitiesSnapshotJson)
+const normalizedBundledSnapshot = normalizeSnapshot(bundledModelCapabilitiesSnapshotJson)
+
+const bundledModelCapabilitiesSnapshot: ModelCapabilitiesSnapshot = {
+	...normalizedBundledSnapshot,
+	models: {
+		...normalizedBundledSnapshot.models,
+		...SUPPLEMENTAL_MODEL_CAPABILITIES,
+	},
+}
 
 export function getBundledModelCapabilitiesSnapshot(): ModelCapabilitiesSnapshot {
 	return bundledModelCapabilitiesSnapshot
diff --git a/src/shared/model-capabilities/supplemental-entries.ts b/src/shared/model-capabilities/supplemental-entries.ts
new file mode 100644
index 000000000..197d88001
--- /dev/null
+++ b/src/shared/model-capabilities/supplemental-entries.ts
@@ -0,0 +1,20 @@
+import type { ModelCapabilitiesSnapshotEntry } from "./types"
+
+export const SUPPLEMENTAL_MODEL_CAPABILITIES: Record<string, ModelCapabilitiesSnapshotEntry> = {
+	"gpt-5.4-mini-fast": {
+		id: "gpt-5.4-mini-fast",
+		family: "gpt-mini",
+		reasoning: true,
+		temperature: false,
+		toolCall: true,
+		modalities: {
+			input: ["text", "image", "pdf"],
+			output: ["text"],
+		},
+		limit: {
+			context: 400000,
+			input: 272000,
+			output: 128000,
+		},
+	},
+}