diff --git a/Sources/CodexBar/UsageStore+WidgetSnapshot.swift b/Sources/CodexBar/UsageStore+WidgetSnapshot.swift
index e0808f9ce..4ee3d9e27 100644
--- a/Sources/CodexBar/UsageStore+WidgetSnapshot.swift
+++ b/Sources/CodexBar/UsageStore+WidgetSnapshot.swift
@@ -122,7 +122,7 @@ extension UsageStore {
             return metadata?.sessionLabel ?? "Session"
         }()
 
-        let rows: [WidgetSnapshot.WidgetUsageRowSnapshot] = [
+        var rows: [WidgetSnapshot.WidgetUsageRowSnapshot] = [
             WidgetSnapshot.WidgetUsageRowSnapshot(
                 id: "primary",
                 title: primaryTitle,
@@ -132,6 +132,12 @@ extension UsageStore {
                 title: metadata?.weeklyLabel ?? "Weekly",
                 percentLeft: snapshot.secondary?.remainingPercent),
         ]
+        if metadata?.supportsOpus == true {
+            rows.append(WidgetSnapshot.WidgetUsageRowSnapshot(
+                id: "tertiary",
+                title: metadata?.opusLabel ?? "Opus",
+                percentLeft: snapshot.tertiary?.remainingPercent))
+        }
         return rows.filter { $0.percentLeft != nil }
     }
 }
diff --git a/Sources/CodexBarWidget/CodexBarWidgetViews.swift b/Sources/CodexBarWidget/CodexBarWidgetViews.swift
index 17699f9e3..b42aabd79 100644
--- a/Sources/CodexBarWidget/CodexBarWidgetViews.swift
+++ b/Sources/CodexBarWidget/CodexBarWidgetViews.swift
@@ -492,7 +492,7 @@ struct WidgetUsageRow: Identifiable, Equatable {
         }
 
         let metadata = ProviderDefaults.metadata[entry.provider]
-        return [
+        var rows = [
             WidgetUsageRow(
                 id: "primary",
                 title: metadata?.sessionLabel ?? "Session",
@@ -501,7 +501,14 @@ struct WidgetUsageRow: Identifiable, Equatable {
                 id: "secondary",
                 title: metadata?.weeklyLabel ?? "Weekly",
                 percentLeft: entry.secondary?.remainingPercent),
-        ].filter { $0.percentLeft != nil }
+        ]
+        if metadata?.supportsOpus == true {
+            rows.append(WidgetUsageRow(
+                id: "tertiary",
+                title: metadata?.opusLabel ?? "Opus",
+                percentLeft: entry.tertiary?.remainingPercent))
+        }
+        return rows.filter { $0.percentLeft != nil }
     }
 }
 
diff --git a/Tests/CodexBarTests/CodexBarWidgetProviderTests.swift b/Tests/CodexBarTests/CodexBarWidgetProviderTests.swift
index a496dfc0d..8d1754bc2 100644
--- a/Tests/CodexBarTests/CodexBarWidgetProviderTests.swift
+++ b/Tests/CodexBarTests/CodexBarWidgetProviderTests.swift
@@ -129,6 +129,27 @@ struct CodexBarWidgetProviderTests {
         #expect(rows == [WidgetUsageRow(id: "weekly", title: "Weekly", percentLeft: 75)])
     }
 
+    @Test
+    func `legacy widget usage rows include tertiary slot when supported`() {
+        let now = Date(timeIntervalSince1970: 1_700_000_000)
+        let entry = WidgetSnapshot.ProviderEntry(
+            provider: .antigravity,
+            updatedAt: now,
+            primary: RateWindow(usedPercent: 10, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            secondary: RateWindow(usedPercent: 20, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            tertiary: RateWindow(usedPercent: 30, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            creditsRemaining: nil,
+            codeReviewRemainingPercent: nil,
+            tokenUsage: nil,
+            dailyUsage: [])
+
+        let rows = WidgetUsageRow.rows(for: entry)
+
+        #expect(rows.map(\.id) == ["primary", "secondary", "tertiary"])
+        #expect(rows.map(\.title) == ["Claude", "Gemini Pro", "Gemini Flash"])
+        #expect(rows.compactMap(\.percentLeft) == [90, 80, 70])
+    }
+
     @Test
     func `widget configuration intents default to codex and credits`() {
         let providerIntent = ProviderSelectionIntent()
diff --git a/Tests/CodexBarTests/UsageStoreWidgetSnapshotTests.swift b/Tests/CodexBarTests/UsageStoreWidgetSnapshotTests.swift
new file mode 100644
index 000000000..dcc797800
--- /dev/null
+++ b/Tests/CodexBarTests/UsageStoreWidgetSnapshotTests.swift
@@ -0,0 +1,50 @@
+import CodexBarCore
+import Foundation
+import Testing
+@testable import CodexBar
+
+@MainActor
+struct UsageStoreWidgetSnapshotTests {
+    @Test
+    func `widget snapshot includes antigravity tertiary usage row`() async throws {
+        let suite = "UsageStoreWidgetSnapshotTests-antigravity-tertiary"
+        let defaults = try #require(UserDefaults(suiteName: suite))
+        defaults.removePersistentDomain(forName: suite)
+
+        let settings = SettingsStore(
+            userDefaults: defaults,
+            configStore: testConfigStore(suiteName: suite),
+            zaiTokenStore: NoopZaiTokenStore(),
+            syntheticTokenStore: NoopSyntheticTokenStore())
+        settings.statusChecksEnabled = false
+
+        let store = UsageStore(
+            fetcher: UsageFetcher(environment: [:]),
+            browserDetection: BrowserDetection(cacheTTL: 0),
+            settings: settings)
+        let snapshot = UsageSnapshot(
+            primary: RateWindow(usedPercent: 10, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            secondary: RateWindow(usedPercent: 20, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            tertiary: RateWindow(usedPercent: 30, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            updatedAt: Date(),
+            identity: ProviderIdentitySnapshot(
+                providerID: .antigravity,
+                accountEmail: nil,
+                accountOrganization: nil,
+                loginMethod: "Pro"))
+
+        store._setSnapshotForTesting(snapshot, provider: .antigravity)
+
+        var widgetSnapshots: [WidgetSnapshot] = []
+        store._test_widgetSnapshotSaveOverride = { widgetSnapshots.append($0) }
+        defer { store._test_widgetSnapshotSaveOverride = nil }
+
+        store.persistWidgetSnapshot(reason: "antigravity-tertiary-test")
+        await store.widgetSnapshotPersistTask?.value
+
+        let entry = try #require(widgetSnapshots.last?.entries.first { $0.provider == .antigravity })
+        #expect(entry.usageRows?.map(\.id) == ["primary", "secondary", "tertiary"])
+        #expect(entry.usageRows?.map(\.title) == ["Claude", "Gemini Pro", "Gemini Flash"])
+        #expect(entry.usageRows?.compactMap(\.percentLeft) == [90, 80, 70])
+    }
+}