diff --git a/packages/ai/src/auth-storage.ts b/packages/ai/src/auth-storage.ts
index 1f1c60529..cd3f87990 100644
--- a/packages/ai/src/auth-storage.ts
+++ b/packages/ai/src/auth-storage.ts
@@ -2185,7 +2185,7 @@ export class AuthStorage {
 	recordUsageCost(
 		provider: Provider,
 		costUsd: number,
-		options?: { sessionId?: string; recordedAt?: number },
+		options?: { sessionId?: string; recordedAt?: number; baseUrl?: string },
 	): boolean {
 		if (!Number.isFinite(costUsd) || costUsd <= 0) return false;
 		const record = this.#store.recordUsageCosts;
@@ -2200,6 +2200,13 @@ export class AuthStorage {
 		};
 		try {
 			record.call(this.#store, [entry]);
+			const cacheKey = this.#buildUsageReportCacheKey({
+				provider,
+				credential,
+				baseUrl: options?.baseUrl,
+			});
+			const existing = this.#usageCache.getStale<UsageReport | null>(cacheKey);
+			this.#usageCache.set(cacheKey, { value: existing?.value ?? null, expiresAt: Date.now() - 1 });
 			return true;
 		} catch (error) {
 			this.#usageLogger?.debug("usage cost record failed", {
diff --git a/packages/ai/test/auth-storage-usage-history.test.ts b/packages/ai/test/auth-storage-usage-history.test.ts
index a0035c7f8..28659bc63 100644
--- a/packages/ai/test/auth-storage-usage-history.test.ts
+++ b/packages/ai/test/auth-storage-usage-history.test.ts
@@ -219,6 +219,21 @@ describe("OpenCode Go usage from observed request costs", () => {
 		]);
 	});
 
+	it("refreshes cached OpenCode Go limits after recording new observed spend", async () => {
+		const nowMs = Date.parse("2026-06-18T12:00:00Z");
+		setSystemTime(new Date(nowMs));
+
+		const initialReports = await storage.fetchUsageReports();
+		const initial = initialReports?.find(candidate => candidate.provider === "opencode-go");
+		expect(initial?.limits.find(limit => limit.id === "rolling-5h")?.amount.used).toBe(0);
+
+		storage.recordUsageCost("opencode-go", 3, { recordedAt: nowMs });
+
+		const refreshedReports = await storage.fetchUsageReports();
+		const refreshed = refreshedReports?.find(candidate => candidate.provider === "opencode-go");
+		expect(refreshed?.limits.find(limit => limit.id === "rolling-5h")?.amount.used).toBe(3);
+	});
+
 	it("aggregates one key's observed spend into OpenCode Go cap windows", async () => {
 		const nowMs = Date.parse("2026-06-18T12:00:00Z");
 		setSystemTime(new Date(nowMs));
diff --git a/packages/coding-agent/src/session/agent-session.ts b/packages/coding-agent/src/session/agent-session.ts
index af2d61655..89eb0d8f0 100644
--- a/packages/coding-agent/src/session/agent-session.ts
+++ b/packages/coding-agent/src/session/agent-session.ts
@@ -2503,6 +2503,7 @@ export class AgentSession {
 					this.#modelRegistry.authStorage.recordUsageCost(assistantMsg.provider, assistantMsg.usage.cost.total, {
 						sessionId: this.#activeProviderSessionId(),
 						recordedAt: assistantMsg.timestamp,
+						baseUrl: this.#modelRegistry.getProviderBaseUrl?.(assistantMsg.provider),
 					});
 				}
 			}