diff --git a/src/cron/isolated-agent/run.ts b/src/cron/isolated-agent/run.ts
index 3933c9ff7c6..1a122f56864 100644
--- a/src/cron/isolated-agent/run.ts
+++ b/src/cron/isolated-agent/run.ts
@@ -748,7 +748,9 @@ export async function runCronIsolatedAgentTurn(params: {
     const modelUsed = finalRunResult.meta?.agentMeta?.model ?? fallbackModel ?? model;
     const providerUsed = finalRunResult.meta?.agentMeta?.provider ?? fallbackProvider ?? provider;
     const contextTokens =
-      agentCfg?.contextTokens ?? lookupContextTokens(modelUsed) ?? DEFAULT_CONTEXT_TOKENS;
+      agentCfg?.contextTokens ??
+      lookupContextTokens(modelUsed, { allowAsyncLoad: false }) ??
+      DEFAULT_CONTEXT_TOKENS;
 
     setSessionRuntimeModel(cronSession.sessionEntry, {
       provider: providerUsed,