diff --git a/src/02_product-documentation/architecture/c4-diagrams.tex b/src/02_product-documentation/architecture/c4-diagrams.tex
index 750a81bf5a603f682b947b6c5f7daed0c6476018..ea6e7164a06a39850684a04929f4d27cee635a4f 100644
--- a/src/02_product-documentation/architecture/c4-diagrams.tex
+++ b/src/02_product-documentation/architecture/c4-diagrams.tex
@@ -47,6 +47,8 @@
                 \caption{OpenAI Assistant Code Diagram}
             \end{figure}
 
+            The OpenAI assistant uses GPT-3.5 via the the OpenAI API.
+
         \subsubsection{Mixtral Assistant Code Diagram}
             \begin{figure}[H]\label{sec:product-documentation/architecture/c4-diagrams/code-diagram/mixtral}
                 \centering
@@ -55,3 +57,5 @@
                 }
                 \caption{Mixtral Assistant Code Diagram}
             \end{figure}
+
+            The Mixtral assistant uses the Mixtral model hosted at OST.