diff --git a/app/components/chat.tsx b/app/components/chat.tsx
index 9990a359e..841a0831b 100644
--- a/app/components/chat.tsx
+++ b/app/components/chat.tsx
@@ -116,6 +116,8 @@ import { ExportMessageModal } from "./exporter";
 import { getClientConfig } from "../config/client";
 import { useAllModels } from "../utils/hooks";
 import { MultimodalContent } from "../client/api";
+import { InputRange } from "./input-range";
+import { config } from "process";
 
 import { ClientApi } from "../client/api";
 import { createTTSPlayer } from "../utils/audio";
@@ -858,6 +860,31 @@ export function EditMessageModal(props: { onClose: () => void }) {
               }
             ></input>
           </ListItem>
+          <ListItem
+            title={Locale.Settings.HistoryCount.Title}
+            subTitle={Locale.Settings.HistoryCount.SubTitle}
+          >
+            <InputRange
+              title={(
+                session.overrideModelConfig?.historyMessageCount ??
+                session.mask.modelConfig.historyMessageCount
+              ).toString()}
+              value={
+                session.overrideModelConfig?.historyMessageCount ??
+                session.mask.modelConfig.historyMessageCount
+              }
+              min="0"
+              max="64"
+              step="1"
+              onChange={(e) =>
+                chatStore.updateCurrentSession(
+                  (session) =>
+                    ((session.overrideModelConfig ??= {}).historyMessageCount =
+                      e.currentTarget.valueAsNumber),
+                )
+              }
+            ></InputRange>
+          </ListItem>
         </List>
         <ContextPrompts
           context={messages}
diff --git a/app/store/chat.ts b/app/store/chat.ts
index 63d7394ec..2230986e7 100644
--- a/app/store/chat.ts
+++ b/app/store/chat.ts
@@ -83,6 +83,8 @@ export interface ChatSession {
   clearContextIndex?: number;
 
   mask: Mask;
+
+  overrideModelConfig?: Partial<ModelConfig>;
 }
 
 export const DEFAULT_TOPIC = Locale.Store.DefaultTopic;
@@ -542,7 +544,9 @@ export const useChatStore = createPersistStore(
         // short term memory
         const shortTermMemoryStartIndex = Math.max(
           0,
-          totalMessageCount - modelConfig.historyMessageCount,
+          totalMessageCount -
+            (session.overrideModelConfig?.historyMessageCount ??
+              modelConfig.historyMessageCount),
         );
 
         // lets concat send messages, including 4 parts:
@@ -679,7 +683,12 @@ export const useChatStore = createPersistStore(
         if (historyMsgLength > (modelConfig?.max_tokens || 4000)) {
           const n = toBeSummarizedMsgs.length;
           toBeSummarizedMsgs = toBeSummarizedMsgs.slice(
-            Math.max(0, n - modelConfig.historyMessageCount),
+            Math.max(
+              0,
+              n -
+                (session.overrideModelConfig?.historyMessageCount ??
+                  modelConfig.historyMessageCount),
+            ),
           );
         }
         const memoryPrompt = get().getMemoryPrompt();