diff --git a/packages/ai/CHANGELOG.md b/packages/ai/CHANGELOG.md
index 694ee5bf..6b1be74a 100644
--- a/packages/ai/CHANGELOG.md
+++ b/packages/ai/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed `cacheRetention` option not being passed through in `buildBaseOptions` ([#1154](https://github.com/badlogic/pi-mono/issues/1154))
+
 ## [0.50.9] - 2026-02-01
 
 ### Added
diff --git a/packages/ai/src/providers/simple-options.ts b/packages/ai/src/providers/simple-options.ts
index f6cbfa65..a1a298aa 100644
--- a/packages/ai/src/providers/simple-options.ts
+++ b/packages/ai/src/providers/simple-options.ts
@@ -6,6 +6,7 @@ export function buildBaseOptions(model: Model<Api>, options?: SimpleStreamOption
 		maxTokens: options?.maxTokens || Math.min(model.maxTokens, 32000),
 		signal: options?.signal,
 		apiKey: apiKey || options?.apiKey,
+		cacheRetention: options?.cacheRetention,
 		sessionId: options?.sessionId,
 		headers: options?.headers,
 		onPayload: options?.onPayload,