diff --git a/apps/server/src/provider/Layers/CodexProvider.ts b/apps/server/src/provider/Layers/CodexProvider.ts
index cdf40f73b1bdd..1eb02ccb3e7c8 100644
--- a/apps/server/src/provider/Layers/CodexProvider.ts
+++ b/apps/server/src/provider/Layers/CodexProvider.ts
@@ -48,7 +48,7 @@ import {
 } from "./codexUsageLimits.ts";
 import packageJson from "../../../package.json" with { type: "json" };
 const isCodexAppServerSpawnError = Schema.is(CodexErrors.CodexAppServerSpawnError);
-const RATE_LIMITS_PROBE_TIMEOUT_MS = 3_000;
+const RATE_LIMITS_PROBE_TIMEOUT_MS = 10_000;
 
 type CodexRateLimitsProbe =
   | {
diff --git a/apps/server/src/provider/Layers/CursorProvider.ts b/apps/server/src/provider/Layers/CursorProvider.ts
index dfaa8ffe338e2..456e46db10f6e 100644
--- a/apps/server/src/provider/Layers/CursorProvider.ts
+++ b/apps/server/src/provider/Layers/CursorProvider.ts
@@ -692,7 +692,7 @@ function getCursorFallbackModels(
 }
 
 /** Timeout for `agent about` — it's slower than a simple `--version` probe. */
-const ABOUT_TIMEOUT_MS = 8_000;
+const ABOUT_TIMEOUT_MS = 10_000;
 
 /** Strip ANSI escape sequences so we can parse plain key-value lines. */
 function stripAnsi(text: string): string {
diff --git a/apps/server/src/provider/Layers/GrokProvider.ts b/apps/server/src/provider/Layers/GrokProvider.ts
index 61cd8a9a38221..adfdf0c54cf0a 100644
--- a/apps/server/src/provider/Layers/GrokProvider.ts
+++ b/apps/server/src/provider/Layers/GrokProvider.ts
@@ -54,9 +54,9 @@ const EMPTY_CAPABILITIES: ModelCapabilities = createModelCapabilities({
   optionDescriptors: [],
 });
 
-const VERSION_PROBE_TIMEOUT_MS = 4_000;
+const VERSION_PROBE_TIMEOUT_MS = 10_000;
 // `initialize` is a single local round trip, so this is generous even on slow machines.
-const GROK_ACP_INITIALIZE_TIMEOUT_MS = 8_000;
+const GROK_ACP_INITIALIZE_TIMEOUT_MS = 10_000;
 const GROK_API_KEY_ENV = "XAI_API_KEY";
 
 const GROK_BUILT_IN_MODELS: ReadonlyArray<ServerProviderModel> = [
diff --git a/apps/server/src/provider/Layers/OpenCodeProvider.test.ts b/apps/server/src/provider/Layers/OpenCodeProvider.test.ts
index b50a51f6cb319..3c822965dae46 100644
--- a/apps/server/src/provider/Layers/OpenCodeProvider.test.ts
+++ b/apps/server/src/provider/Layers/OpenCodeProvider.test.ts
@@ -366,14 +366,14 @@ it.layer(testLayer)("checkOpenCodeProviderStatus", (it) => {
       const probeFiber = yield* checkProvider(makeOpenCodeSettings()).pipe(Effect.forkChild);
 
       yield* Effect.yieldNow;
-      yield* TestClock.adjust("4 seconds");
+      yield* TestClock.adjust("10 seconds");
       const snapshot = yield* Fiber.join(probeFiber);
 
       NodeAssert.equal(snapshot.status, "error");
       NodeAssert.equal(snapshot.installed, true);
       NodeAssert.equal(
         snapshot.message,
-        "Failed to execute OpenCode CLI health check: OpenCode CLI version probe timed out after 4 seconds.",
+        "Failed to execute OpenCode CLI health check: OpenCode CLI version probe timed out after 10 seconds.",
       );
     }).pipe(Effect.provide(TestClock.layer())),
   );
diff --git a/apps/server/src/provider/Layers/OpenCodeProvider.ts b/apps/server/src/provider/Layers/OpenCodeProvider.ts
index 0495f8b307375..f753d14611219 100644
--- a/apps/server/src/provider/Layers/OpenCodeProvider.ts
+++ b/apps/server/src/provider/Layers/OpenCodeProvider.ts
@@ -33,7 +33,10 @@ const OPENCODE_PRESENTATION = {
   displayName: "OpenCode",
   showInteractionModeToggle: false,
 } as const;
-const OPENCODE_VERSION_PROBE_TIMEOUT = "4 seconds";
+// `opencode --version` takes 2-4s on Windows (Node shim + Defender cold start),
+// so the old 4s cap flapped to Unavailable under any load. Match the 10s auth-probe
+// budget used for Codex/Grok (see AUTH_PROBE_TIMEOUT_MS).
+const OPENCODE_VERSION_PROBE_TIMEOUT = "10 seconds";
 
 class OpenCodeProbeError extends Data.TaggedError("OpenCodeProbeError")<{
   readonly cause?: unknown;
diff --git a/apps/server/src/provider/providerSnapshot.ts b/apps/server/src/provider/providerSnapshot.ts
index c5503a1754985..a33397693d0a2 100644
--- a/apps/server/src/provider/providerSnapshot.ts
+++ b/apps/server/src/provider/providerSnapshot.ts
@@ -20,7 +20,7 @@ import { isWindowsCommandNotFound } from "../processRunner.ts";
 import { createProviderVersionAdvisory } from "./providerMaintenance.ts";
 import { collectUint8StreamText } from "../stream/collectUint8StreamText.ts";
 
-export const DEFAULT_TIMEOUT_MS = 4_000;
+export const DEFAULT_TIMEOUT_MS = 10_000;
 // Auth status checks involve disk/network lookups and can be slow on first run (especially Windows)
 export const AUTH_PROBE_TIMEOUT_MS = 10_000;