diff --git a/config/gpu/h100.toml b/config/gpu/h100.toml
index 0c63ad7bb..9ca38f725 100644
--- a/config/gpu/h100.toml
+++ b/config/gpu/h100.toml
@@ -1,6 +1,6 @@
 # H100 PCIe/SXM (80GB VRAM) -- full production
 [training]
-batch_size = 16384
+batch_size = 8192
 num_atoms = 52
 buffer_size = 500000
 hidden_dim_base = 256