diff --git a/src/utils/betas.ts b/src/utils/betas.ts
index 2a0fc25a3..86c8123b5 100644
--- a/src/utils/betas.ts
+++ b/src/utils/betas.ts
@@ -26,7 +26,7 @@ import { has1mContext } from './context.js'
 import { isEnvDefinedFalsy, isEnvTruthy } from './envUtils.js'
 import { getCanonicalName } from './model/model.js'
 import { get3PModelCapabilityOverride } from './model/modelSupportOverrides.js'
-import { getAPIProvider } from './model/providers.js'
+import { getAPIProvider, isFirstPartyAnthropicBaseUrl } from './model/providers.js'
 import { getInitialSettings } from './settings/settings.js'
 
 /**
@@ -213,7 +213,8 @@ export function getToolSearchBetaHeader(): string {
 export function shouldIncludeFirstPartyOnlyBetas(): boolean {
   return (
     (getAPIProvider() === 'firstParty' || getAPIProvider() === 'foundry') &&
-    !isEnvTruthy(process.env.CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS)
+    !isEnvTruthy(process.env.CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS) &&
+    isFirstPartyAnthropicBaseUrl()
   )
 }