diff --git a/scripts/frank-default-large.env b/scripts/frank-default-large.env
index 3a4a8cc..c23884f 100644
--- a/scripts/frank-default-large.env
+++ b/scripts/frank-default-large.env
@@ -52,7 +52,7 @@ BATCH_SIZE=2048
 UBATCH_SIZE=2048
 CACHE_TYPE_K=f16
 CACHE_TYPE_V=f16
-CTX_CHECKPOINTS=32
+CTX_CHECKPOINTS=16
 CACHE_RAM=8192
 
 # Native MTP draft (depth-4, greedy, ROCm-safe CPU argmax fast path).