diff --git a/public/scripts/openai.js b/public/scripts/openai.js
index a6ea2b84e..66a434c6c 100644
--- a/public/scripts/openai.js
+++ b/public/scripts/openai.js
@@ -2522,6 +2522,25 @@ function getReasoningEffort(settings = null, model = null) {
             }
         }
 
+        if (settings.chat_completion_source === chat_completion_sources.CUSTOM && /^koboldcpp\/(.+)$/.test(model)) {
+            switch (settings.reasoning_effort) {
+                case reasoning_effort_types.auto:
+                    return undefined;
+                case reasoning_effort_types.min:
+                    return 'minimal';
+                case reasoning_effort_types.low:
+                    return 'low';
+                case reasoning_effort_types.medium:
+                    return 'medium';
+                case reasoning_effort_types.high:
+                    return 'high';
+                case reasoning_effort_types.max:
+                    return 'xhigh';
+                default:
+                    return settings.reasoning_effort;
+            }
+        }
+
         switch (settings.reasoning_effort) {
             case reasoning_effort_types.auto:
                 return undefined;
diff --git a/src/endpoints/backends/chat-completions.js b/src/endpoints/backends/chat-completions.js
index e2ff3ae53..615d88316 100644
--- a/src/endpoints/backends/chat-completions.js
+++ b/src/endpoints/backends/chat-completions.js
@@ -2485,6 +2485,9 @@ router.post('/generate', async function (request, response) {
             if (OPENAI_REASONING_EFFORT_MODELS.includes(request.body.model)) {
                 bodyParams['reasoning_effort'] = OPENAI_FIXED_REASONING_EFFORT[request.body.model] ?? OPENAI_REASONING_EFFORT_MAP[request.body.reasoning_effort] ?? request.body.reasoning_effort;
             }
+            if (request.body.chat_completion_source === CHAT_COMPLETION_SOURCES.CUSTOM && /^koboldcpp\/(.+)$/.test(request.body.model)) {
+                bodyParams['reasoning_effort'] = request.body.reasoning_effort;
+            }
         }
 
         if (request.body.verbosity && [CHAT_COMPLETION_SOURCES.CUSTOM, CHAT_COMPLETION_SOURCES.OPENAI].includes(request.body.chat_completion_source)) {