diff --git a/docs-site/src/content/docs/reference/adapters.md b/docs-site/src/content/docs/reference/adapters.md
index 970557956..dd6224d6c 100644
--- a/docs-site/src/content/docs/reference/adapters.md
+++ b/docs-site/src/content/docs/reference/adapters.md
@@ -181,8 +181,9 @@ advertised effort control on those models as proof of upstream-native reasoning
 - Exposes Cursor Router as `cursor/auto` plus explicit `cursor/auto-cost`,
   `cursor/auto-balance`, and `cursor/auto-intelligence` entries. Explicit levels are encoded in
   `requested_model.parameters` while the legacy `cursor/auto` entry retains the account/team default.
-- Keeps `cursor/grok-4.5-fast` as a selectable model while sending Cursor's canonical `grok-4.5`
-  model with separate `effort` and `fast=true` parameters.
+- Sends regular `cursor/grok-4.5` tiers with Cursor's exact live-discovery wire ids
+  (`cursor-grok-4.5-low`, `-medium`, or `-high`). Keeps `cursor/grok-4.5-fast` selectable while
+  sending the canonical `grok-4.5` model with separate `effort` and `fast=true` parameters.
 - Cursor-native local filesystem/shell/network execution is denied by default. Explicit `mcpServers`
   and `desktopExecutor` integrations have separate opt-ins; `nativeLocalExec: "on"` enables the
   broader built-in executor and bypasses Codex approval/sandbox semantics, and legacy
diff --git a/src/adapters/cursor/effort-map.ts b/src/adapters/cursor/effort-map.ts
index a7c0b76e4..1e937b310 100644
--- a/src/adapters/cursor/effort-map.ts
+++ b/src/adapters/cursor/effort-map.ts
@@ -126,3 +126,14 @@ export function cursorWireModelIdWithEffort(baseModelId: string, effortSuffix: s
   }
   return `${baseModelId}-${effortSuffix}`;
 }
+
+/**
+ * Compose the exact flattened id sent by AgentService/Run. Discovery normalizes Cursor's optional
+ * `cursor-` prefix only for catalog matching, but regular Grok 4.5 requests require that prefix on
+ * the wire. Keep this separate from {@link cursorWireModelIdWithEffort} so discovery can continue
+ * comparing canonical, prefix-free ids. Grok Fast uses requested_model parameters instead.
+ */
+export function cursorRequestWireModelIdWithEffort(baseModelId: string, effortSuffix: string): string {
+  const flattened = cursorWireModelIdWithEffort(baseModelId, effortSuffix);
+  return baseModelId === "grok-4.5" ? `cursor-${flattened}` : flattened;
+}
diff --git a/src/adapters/cursor/request-builder.ts b/src/adapters/cursor/request-builder.ts
index a28a32acb..b60f49fff 100644
--- a/src/adapters/cursor/request-builder.ts
+++ b/src/adapters/cursor/request-builder.ts
@@ -10,7 +10,7 @@ import type {
 import { isAllowedToolChoice, namespacedToolName, toolChoiceAliases, type OcxTool, type OcxToolChoice } from "../../types";
 import type { CursorRequestMessage, CursorRequestedModelParameter, CursorRunRequest } from "./types";
 import { cursorWireModelSelection, type CursorRoutingLevel } from "./discovery";
-import { cursorEffortSuffix, cursorWireModelIdWithEffort } from "./effort-map";
+import { cursorEffortSuffix, cursorRequestWireModelIdWithEffort } from "./effort-map";
 import {
   cursorMcpToolEncodedSize,
   cursorMcpToolsEncodedSize,
@@ -151,7 +151,7 @@ function normalizeCursorModelId(modelId: string, reasoning?: string): {
       ],
     };
   }
-  return { ...selection, modelId: suffix ? cursorWireModelIdWithEffort(id, suffix) : id };
+  return { ...selection, modelId: suffix ? cursorRequestWireModelIdWithEffort(id, suffix) : id };
 }
 
 function contentPartToText(part: OcxContentPart | OcxAssistantContentPart): string | undefined {
diff --git a/src/providers/quota.ts b/src/providers/quota.ts
index 3ff9396c8..01516340a 100644
--- a/src/providers/quota.ts
+++ b/src/providers/quota.ts
@@ -64,6 +64,15 @@ export interface ProviderQuotaWindow {
   resetAt?: number;
 }
 
+export interface ProviderQuotaCreditsUsd {
+  used: number;
+  limit: number;
+  remaining: number;
+  percent: number;
+  expiresAt?: number;
+  unlimited?: boolean;
+}
+
 export interface ProviderQuota {
   fiveHourPercent?: number;
   fiveHourResetAt?: number;
@@ -72,6 +81,7 @@ export interface ProviderQuota {
   monthlyPercent?: number;
   monthlyResetAt?: number;
   customWindows?: ProviderQuotaWindow[];
+  creditsUsd?: ProviderQuotaCreditsUsd;
   updatedAt: number;
 }
 
@@ -203,6 +213,8 @@ function hasQuotaRows(quota: ProviderQuota | null | undefined): quota is Provide
   return typeof quota.fiveHourPercent === "number"
     || typeof quota.weeklyPercent === "number"
     || typeof quota.monthlyPercent === "number"
+    || quota.creditsUsd?.unlimited === true
+    || typeof quota.creditsUsd?.percent === "number"
     || !!quota.customWindows?.some(window => typeof window.percent === "number");
 }
 
@@ -340,6 +352,27 @@ async function fetchA6apiQuota(provider: string, config: OcxProviderConfig): Pro
   }
   const subscription = a6apiPayload(await subscriptionResponse.json().catch(() => null));
   const token = a6apiPayload(await tokenResponse.json().catch(() => null));
+  const unlimited = token?.unlimited_quota === true
+    || token?.unlimited_quota === 1
+    || token?.unlimited_quota === "true";
+  const normalizedExpiry = normalizeResetAt(token?.expires_at);
+  const expiry = normalizedExpiry && normalizedExpiry > 0
+    ? { expiresAt: normalizedExpiry }
+    : {};
+  if (unlimited) {
+    return report(provider, "a6api:billing", {
+      creditsUsd: {
+        used: 0,
+        limit: 0,
+        remaining: 0,
+        percent: 0,
+        unlimited: true,
+        ...expiry,
+      },
+      customWindows: [{ label: "Unlimited API credits", percent: 0 }],
+      updatedAt: Date.now(),
+    });
+  }
   const limitUsd = firstFinite(subscription, ["hard_limit_usd"]);
   const grantedUnits = firstFinite(token, ["total_granted"]);
   const usedUnits = firstFinite(token, ["total_used"]);
@@ -362,6 +395,13 @@ async function fetchA6apiQuota(provider: string, config: OcxProviderConfig): Pro
   if (percent === undefined) return TERMINAL_QUOTA_FAILURE;
   const label = `API credits ($${remainingUsd.toFixed(2)} of $${limitUsd.toFixed(2)} remaining)`;
   return report(provider, "a6api:billing", {
+    creditsUsd: {
+      used: usedUsd,
+      limit: limitUsd,
+      remaining: remainingUsd,
+      percent,
+      ...expiry,
+    },
     customWindows: [{ label, percent }],
     updatedAt: Date.now(),
   });
diff --git a/tests/cursor-effort-suffix.test.ts b/tests/cursor-effort-suffix.test.ts
index 218a06eef..2d4c627f0 100644
--- a/tests/cursor-effort-suffix.test.ts
+++ b/tests/cursor-effort-suffix.test.ts
@@ -3,6 +3,15 @@ import { createCursorRequest } from "../src/adapters/cursor/request-builder";
 import { cursorEffortSuffix, cursorModelEffortLadder } from "../src/adapters/cursor/effort-map";
 import type { OcxParsedRequest } from "../src/types";
 
+// Static fixture recorded from Cursor GetUsableModels on 2026-08-06. This pins the
+// exact wire ids observed during the incident; live availability normalization is
+// covered separately in cursor-discovery.test.ts.
+const RECORDED_CURSOR_GROK_45_DISCOVERY_IDS = [
+  "cursor-grok-4.5-low",
+  "cursor-grok-4.5-medium",
+  "cursor-grok-4.5-high",
+] as const;
+
 function modelIdFor(modelId: string, reasoning?: string): string {
   const parsed: OcxParsedRequest = {
     modelId,
@@ -84,13 +93,13 @@ describe("Cursor per-model reasoning-effort suffix", () => {
   });
 
   test("grok-4.5 uses current tiers and sends Fast as a separate model parameter", () => {
-    expect(modelIdFor("cursor/grok-4.5", "low")).toBe("grok-4.5-low");
-    expect(modelIdFor("cursor/grok-4.5", "medium")).toBe("grok-4.5-medium");
-    expect(modelIdFor("cursor/grok-4.5", "high")).toBe("grok-4.5-high");
-    expect(modelIdFor("cursor/grok-4.5", "xhigh")).toBe("grok-4.5-high");
-    expect(modelIdFor("cursor/grok-4.5")).toBe("grok-4.5-high");
+    expect(modelIdFor("cursor/grok-4.5", "low")).toBe("cursor-grok-4.5-low");
+    expect(modelIdFor("cursor/grok-4.5", "medium")).toBe("cursor-grok-4.5-medium");
+    expect(modelIdFor("cursor/grok-4.5", "high")).toBe("cursor-grok-4.5-high");
+    expect(modelIdFor("cursor/grok-4.5", "xhigh")).toBe("cursor-grok-4.5-high");
+    expect(modelIdFor("cursor/grok-4.5")).toBe("cursor-grok-4.5-high");
     expect(selectionFor("cursor/grok-4.5", "high")).toEqual({
-      modelId: "grok-4.5-high",
+      modelId: "cursor-grok-4.5-high",
       parameters: undefined,
     });
     expect(selectionFor("cursor/grok-4.5-fast", "low")).toEqual({
@@ -118,6 +127,14 @@ describe("Cursor per-model reasoning-effort suffix", () => {
     expect(cursorModelEffortLadder("grok-4.5-fast")).toEqual(["low", "medium", "high"]);
   });
 
+  test("regular grok-4.5 request ids match the recorded discovery fixture", () => {
+    for (const effort of ["low", "medium", "high"] as const) {
+      const requestModelId = modelIdFor("cursor/grok-4.5", effort);
+      expect(requestModelId).toBe(`cursor-grok-4.5-${effort}`);
+      expect(RECORDED_CURSOR_GROK_45_DISCOVERY_IDS).toContain(requestModelId);
+    }
+  });
+
   test("kimi-k3 maps to its live effort-suffixed variants", () => {
     expect(modelIdFor("cursor/kimi-k3", "low")).toBe("kimi-k3-low");
     expect(modelIdFor("cursor/kimi-k3", "medium")).toBe("kimi-k3-high");
diff --git a/tests/provider-quota.test.ts b/tests/provider-quota.test.ts
index 873a7af54..4a0ed3b1c 100644
--- a/tests/provider-quota.test.ts
+++ b/tests/provider-quota.test.ts
@@ -282,6 +282,13 @@ describe("fetchProviderQuotaReports", () => {
       label: "API credits ($15.00 of $20.00 remaining)",
       percent: 25,
     }]);
+    expect(result.reports[0]?.quota.creditsUsd).toEqual({
+      used: 5,
+      limit: 20,
+      remaining: 15,
+      percent: 25,
+      expiresAt: Date.parse("2026-08-01T00:00:00Z"),
+    });
     expect(seen.map(row => row.url).sort()).toEqual([
       "https://api.a6api.com/api/usage/token/",
       "https://api.a6api.com/dashboard/billing/subscription",
@@ -290,6 +297,36 @@ describe("fetchProviderQuotaReports", () => {
     expect(seen.every(row => row.redirect === "error")).toBe(true);
   });
 
+  test("A6API unlimited keys remain visible even when all finite credit totals are zero", async () => {
+    globalThis.fetch = (async (input: RequestInfo | URL) => new Response(JSON.stringify(
+      String(input).includes("subscription")
+        ? { data: { hard_limit_usd: 100_000_000 } }
+        : { data: {
+          total_granted: 0,
+          total_used: 0,
+          total_available: 0,
+          unlimited_quota: true,
+          expires_at: "2027-01-01T00:00:00Z",
+        } },
+    ), { status: 200 })) as typeof fetch;
+
+    const result = await fetchProviderQuotaReports(a6apiOnlyConfig(), true);
+
+    expect(result.reports).toHaveLength(1);
+    expect(result.reports[0]?.quota.creditsUsd).toEqual({
+      used: 0,
+      limit: 0,
+      remaining: 0,
+      percent: 0,
+      unlimited: true,
+      expiresAt: Date.parse("2027-01-01T00:00:00Z"),
+    });
+    expect(result.reports[0]?.quota.customWindows).toEqual([{
+      label: "Unlimited API credits",
+      percent: 0,
+    }]);
+  });
+
   test("A6API quota never sends API keys to a non-canonical base URL", async () => {
     const seen: string[] = [];
     globalThis.fetch = (async (input: RequestInfo | URL) => {