diff --git a/src/agents/failover-error.ts b/src/agents/failover-error.ts
index ee287d79484..5b3884b29f2 100644
--- a/src/agents/failover-error.ts
+++ b/src/agents/failover-error.ts
@@ -183,7 +183,19 @@ export function resolveFailoverReasonFromError(err: unknown): FailoverReason | n
   }
 
   const code = (getErrorCode(err) ?? "").toUpperCase();
-  if (["ETIMEDOUT", "ESOCKETTIMEDOUT", "ECONNRESET", "ECONNABORTED"].includes(code)) {
+  if (
+    [
+      "ETIMEDOUT",
+      "ESOCKETTIMEDOUT",
+      "ECONNRESET",
+      "ECONNABORTED",
+      "ECONNREFUSED",
+      "ENETUNREACH",
+      "EHOSTUNREACH",
+      "ENETRESET",
+      "EAI_AGAIN",
+    ].includes(code)
+  ) {
     return "timeout";
   }
   if (isTimeoutError(err)) {
diff --git a/src/agents/model-fallback.test.ts b/src/agents/model-fallback.test.ts
index cd0217faafc..14b705fffbd 100644
--- a/src/agents/model-fallback.test.ts
+++ b/src/agents/model-fallback.test.ts
@@ -751,6 +751,42 @@ describe("runWithModelFallback", () => {
     });
   });
 
+  it("falls back on ECONNREFUSED (local server down or remote unreachable)", async () => {
+    await expectFallsBackToHaiku({
+      provider: "openai",
+      model: "gpt-4.1-mini",
+      firstError: Object.assign(new Error("connect ECONNREFUSED 127.0.0.1:11434"), {
+        code: "ECONNREFUSED",
+      }),
+    });
+  });
+
+  it("falls back on ENETUNREACH (network disconnected)", async () => {
+    await expectFallsBackToHaiku({
+      provider: "openai",
+      model: "gpt-4.1-mini",
+      firstError: Object.assign(new Error("connect ENETUNREACH"), { code: "ENETUNREACH" }),
+    });
+  });
+
+  it("falls back on EHOSTUNREACH (host unreachable)", async () => {
+    await expectFallsBackToHaiku({
+      provider: "openai",
+      model: "gpt-4.1-mini",
+      firstError: Object.assign(new Error("connect EHOSTUNREACH"), { code: "EHOSTUNREACH" }),
+    });
+  });
+
+  it("falls back on EAI_AGAIN (DNS resolution failure)", async () => {
+    await expectFallsBackToHaiku({
+      provider: "openai",
+      model: "gpt-4.1-mini",
+      firstError: Object.assign(new Error("getaddrinfo EAI_AGAIN api.openai.com"), {
+        code: "EAI_AGAIN",
+      }),
+    });
+  });
+
   it("falls back on provider abort errors with request-aborted messages", async () => {
     await expectFallsBackToHaiku({
       provider: "openai",