diff --git a/src/cpp/exe/full_run/main.cpp b/src/cpp/exe/full_run/main.cpp
index fdc826b3ef..b96660ef8d 100644
--- a/src/cpp/exe/full_run/main.cpp
+++ b/src/cpp/exe/full_run/main.cpp
@@ -1,3 +1,5 @@
+#include <json/json.h>
+
 #include <boost/program_options.hpp>
 #include <exception>
 #include <iostream>
@@ -8,8 +10,27 @@
 #include "RunProblemGeneration.h"
 #include "StudyUpdateRunner.h"
 #include "common_mpi.h"
+#include "default_json.h"
 namespace po = boost::program_options;
 
+void BendersPreActions(std::filesystem::path option_file) {
+  if (std::filesystem::exists(option_file) &&
+      std::filesystem::is_regular_file(option_file)) {
+    return;  // TODO: Cas python dejà passé par là. On garde on non ?
+  }
+
+  std::istringstream option_stream(DefaultJson::BendersOptions);
+  std::string err;
+  Json::CharReaderBuilder builder;
+  Json::Value root;
+  if (!Json::parseFromStream(builder, option_stream, &root, &err)) {
+    // TODO: log
+  }
+
+  std::ofstream outStream(option_file);
+  outStream << root;
+}
+
 int main(int argc, char** argv) {
   mpi::environment env(argc, argv);
   mpi::communicator world;
@@ -48,6 +69,8 @@ int main(int argc, char** argv) {
   const auto options_file = options_parser.BendersOptionsFile();
   const auto benders_method = options_parser.Method();
 
+  BendersPreActions(options_file);
+
   auto benders_factory =
       BendersMainFactory(argc_, argv, benders_method, options_file, env, world);
   benders_factory.Run();
diff --git a/src/cpp/full_run/CMakeLists.txt b/src/cpp/full_run/CMakeLists.txt
index fefcd33e5a..c3ee11f3b0 100644
--- a/src/cpp/full_run/CMakeLists.txt
+++ b/src/cpp/full_run/CMakeLists.txt
@@ -12,6 +12,7 @@
 
 add_library (full_run_lib STATIC
 	${CMAKE_CURRENT_SOURCE_DIR}/FullRunOptionsParser.cpp
+		${CMAKE_CURRENT_SOURCE_DIR}/include/default_json.h
 )
 
 
diff --git a/src/cpp/full_run/include/default_json.h b/src/cpp/full_run/include/default_json.h
new file mode 100644
index 0000000000..bbddfce419
--- /dev/null
+++ b/src/cpp/full_run/include/default_json.h
@@ -0,0 +1,28 @@
+//
+// Created by marechaljas on 25/10/23.
+//
+
+#pragma once
+#include <string>
+
+namespace DefaultJson {
+std::string BendersOptions =
+    "{ \
+    \"MAX_ITERATIONS\": -1,\n \
+    \"ABSOLUTE_GAP\": 1.0,\n \
+    \"RELATIVE_GAP\": 1e-06,\n \
+    \"RELAXED_GAP\": 1e-05,\n \
+    \"AGGREGATION\": false,\n \
+    \"OUTPUTROOT\": \".\",\n \
+    \"TRACE\": true,\n \
+    \"SLAVE_WEIGHT\": \"CONSTANT\",\n \
+    \"SLAVE_WEIGHT_VALUE\": 1,\n \
+    \"MASTER_NAME\": \"master\",\n \
+    \"STRUCTURE_FILE\": \"structure.txt\",\n \
+    \"INPUTROOT\": \".\",\n \
+    \"CSV_NAME\": \"benders_output_trace\",\n \
+    \"BOUND_ALPHA\": true,\n \
+    \"SEPARATION_PARAM\": 0.5,\n \
+    \"BATCH_SIZE\": 0,\n \
+  }";
+}
\ No newline at end of file