diff --git a/cogito:3b-16k-think/Modelfile b/cogito:3b-16k-think/Modelfile
new file mode 100644
index 0000000..7627d4a
--- /dev/null
+++ b/cogito:3b-16k-think/Modelfile
@@ -0,0 +1,3 @@
+FROM cogito:3b
+PARAMETER num_ctx 16384
+SYSTEM """Enable deep thinking subroutine."""
diff --git a/qwen3:4b-16k/Modelfile b/qwen3:4b-16k/Modelfile
new file mode 100644
index 0000000..a10ea65
--- /dev/null
+++ b/qwen3:4b-16k/Modelfile
@@ -0,0 +1,2 @@
+FROM qwen3:4b
+PARAMETER num_ctx 16384