diff --git a/src/lib/usage/migrations.ts b/src/lib/usage/migrations.ts
index 9fd9e1b053..620b8f4f2b 100644
--- a/src/lib/usage/migrations.ts
+++ b/src/lib/usage/migrations.ts
@@ -16,6 +16,7 @@ import { getLegacyDotDataDir, isSamePath } from "../dataPaths";
 import { getAppLogFilePath } from "../logEnv";
 import { protectPayloadForLog } from "../logPayloads";
 import { sanitizePII } from "../piiSanitizer";
+import { resolveProviderId } from "@/shared/constants/providers";
 import { writeCallArtifact, type CallLogArtifact } from "./callLogArtifacts";
 import {
   resolveImportedUsageAccountIdentity,
@@ -333,7 +334,7 @@ export function migrateUsageJsonToSqlite() {
               : resolveOrphanedUsageAccountIdentity(entry.provider, connectionId);
             const identity = resolveImportedUsageAccountIdentity(entry, fallbackIdentity);
             insert.run({
-              provider: entry.provider || null,
+              provider: entry.provider ? resolveProviderId(entry.provider) : null,
               model: entry.model || null,
               connectionId,
               accountKey: identity.accountKey,
diff --git a/src/lib/usage/usageHistory.ts b/src/lib/usage/usageHistory.ts
index a6fb9a7d3a..0a58123bc9 100644
--- a/src/lib/usage/usageHistory.ts
+++ b/src/lib/usage/usageHistory.ts
@@ -8,6 +8,7 @@
  */
 
 import { getDbInstance } from "../db/core";
+import { resolveProviderId } from "@/shared/constants/providers";
 import { protectPayloadForLog } from "../logPayloads";
 import { sanitizeErrorMessage } from "@omniroute/open-sse/utils/errorSanitization.ts";
 import {
@@ -728,7 +729,7 @@ export async function saveRequestUsage(entry: UsageEntry) {
         )
         .get(
           timestamp,
-          entry.provider || null,
+          (entry.provider ? resolveProviderId(entry.provider) : null),
           entry.model || null,
           entry.connectionId || null,
           entry.apiKeyId || null,
@@ -756,7 +757,7 @@ export async function saveRequestUsage(entry: UsageEntry) {
         VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
       `
       ).run(
-        entry.provider || null,
+        (entry.provider ? resolveProviderId(entry.provider) : null),
         entry.model || null,
         entry.connectionId || null,
         accountIdentity.accountKey,
diff --git a/tests/unit/usage-history-provider-alias-13459.test.ts b/tests/unit/usage-history-provider-alias-13459.test.ts
new file mode 100644
index 0000000000..a7a1e5866b
--- /dev/null
+++ b/tests/unit/usage-history-provider-alias-13459.test.ts
@@ -0,0 +1,37 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+// #13459: usage_history rows written under a provider alias ("af") and under the
+// canonical id ("api-airforce") split one provider into two analytics buckets.
+
+const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-usage-alias-"));
+process.env.DATA_DIR = TEST_DATA_DIR;
+
+const core = await import("../../src/lib/db/core.ts");
+const usageHistory = await import("../../src/lib/usage/usageHistory.ts");
+
+test.after(() => {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
+});
+
+test("#13459 saveRequestUsage stores the canonical provider id for an alias", async () => {
+  for (const provider of ["af", "api-airforce"]) {
+    await usageHistory.saveRequestUsage({
+      provider,
+      model: "gpt-4o-mini",
+      tokens: { input: 10, output: 5 },
+      success: true,
+      latencyMs: 100,
+      timestamp: new Date().toISOString(),
+    });
+  }
+  const rows = core
+    .getDbInstance()
+    .prepare("SELECT provider, COUNT(*) AS n FROM usage_history GROUP BY provider")
+    .all() as Array<{ provider: string; n: number }>;
+  assert.deepEqual(rows, [{ provider: "api-airforce", n: 2 }]);
+});