diff --git a/frontend/editor/public/locales/en-GB/translation.toml b/frontend/editor/public/locales/en-GB/translation.toml
index d2b2aa38e3..71510f202a 100644
--- a/frontend/editor/public/locales/en-GB/translation.toml
+++ b/frontend/editor/public/locales/en-GB/translation.toml
@@ -818,6 +818,7 @@ openai = "OpenAI API key"
 setPlaceholder = "Saved - leave blank to keep the current key"
 
 [admin.settings.ai.models.baseUrl]
+contextWindow = "Check the model's context window. The engine sends prompts of several thousand tokens and a window below 16,384 will silently truncate them - the oldest part of the prompt is dropped, so the model answers without having seen the request. Ollama defaults to 4,096 and divides that between parallel requests; raise it with OLLAMA_CONTEXT_LENGTH on the server."
 description = "Base URL of the OpenAI-compatible / Ollama endpoint, e.g. http://ollama:11434/v1."
 label = "Provider base URL"
 warning = "The base URL must point at a trusted internal endpoint. The engine will make server-side requests to it, so an untrusted value is SSRF-sensitive."
diff --git a/frontend/editor/public/locales/en-US/translation.toml b/frontend/editor/public/locales/en-US/translation.toml
index 681bca4dd8..8a724a2a48 100644
--- a/frontend/editor/public/locales/en-US/translation.toml
+++ b/frontend/editor/public/locales/en-US/translation.toml
@@ -818,6 +818,7 @@ openai = "OpenAI API key"
 setPlaceholder = "Saved - leave blank to keep the current key"
 
 [admin.settings.ai.models.baseUrl]
+contextWindow = "Check the model's context window. The engine sends prompts of several thousand tokens and a window below 16,384 will silently truncate them - the oldest part of the prompt is dropped, so the model answers without having seen the request. Ollama defaults to 4,096 and divides that between parallel requests; raise it with OLLAMA_CONTEXT_LENGTH on the server."
 description = "Base URL of the OpenAI-compatible / Ollama endpoint, e.g. http://ollama:11434/v1."
 label = "Provider base URL"
 warning = "The base URL must point at a trusted internal endpoint. The engine will make server-side requests to it, so an untrusted value is SSRF-sensitive."
diff --git a/frontend/editor/src/proprietary/components/shared/config/configSections/AdminAiModelsSection.tsx b/frontend/editor/src/proprietary/components/shared/config/configSections/AdminAiModelsSection.tsx
index acba1c9571..ce30b1df82 100644
--- a/frontend/editor/src/proprietary/components/shared/config/configSections/AdminAiModelsSection.tsx
+++ b/frontend/editor/src/proprietary/components/shared/config/configSections/AdminAiModelsSection.tsx
@@ -370,6 +370,23 @@ export default function AdminAiModelsSection() {
                 </Text>
               </Alert>
             )}
+
+            {showBaseUrl && (
+              <Alert
+                variant="light"
+                color="blue"
+                icon={
+                  <LocalIcon icon="info-rounded" width="1rem" height="1rem" />
+                }
+              >
+                <Text size="xs">
+                  {t(
+                    "admin.settings.ai.models.baseUrl.contextWindow",
+                    "Check the model's context window. The engine sends prompts of several thousand tokens and a window below 16,384 will silently truncate them - the oldest part of the prompt is dropped, so the model answers without having seen the request. Ollama defaults to 4,096 and divides that between parallel requests; raise it with OLLAMA_CONTEXT_LENGTH on the server.",
+                  )}
+                </Text>
+              </Alert>
+            )}
           </Stack>
         </Paper>
       </Stack>