diff --git a/app/client/api.ts b/app/client/api.ts
index f60b0e2ad71..0f972c01d0d 100644
--- a/app/client/api.ts
+++ b/app/client/api.ts
@@ -11,6 +11,7 @@ import {
   useAccessStore,
   useChatStore,
 } from "../store";
+import type { ModelConfig } from "../store/config";
 import { ChatGPTApi, DalleRequestPayload } from "./platforms/openai";
 import { GeminiProApi } from "./platforms/google";
 import { ClaudeApi } from "./platforms/anthropic";
@@ -397,3 +398,78 @@ export function getClientApi(provider: ServiceProvider): ClientApi {
       return new ClientApi(ModelProvider.GPT);
   }
 }
+
+// Core fields that must not be overwritten by extraParams
+const PROTECTED_PAYLOAD_KEYS = new Set([
+  "messages",
+  "model",
+  "stream",
+  "temperature",
+  "top_p",
+  "presence_penalty",
+  "frequency_penalty",
+]);
+
+/**
+ * Apply model-config extras to a request payload (called after requestPayload
+ * has been constructed in each provider):
+ *   1. Remove parameters flagged as "do not send" so the provider defaults
+ *      are used instead.
+ *   2. Parse modelConfig.extraParams (a JSON string) and merge it into the
+ *      payload.
+ *   3. Protect core fields from being overwritten by extraParams.
+ *
+ * Note: temperature/top_p/presence_penalty/frequency_penalty are in the
+ * protected set because they can be removed by the disable flags above;
+ * adding them back via extraParams would defeat that intent.
+ */
+export function applyModelConfigExtras(
+  modelConfig: ModelConfig,
+  payload: Record<string, any>,
+): Record<string, any> {
+  if (!payload || typeof payload !== "object") {
+    return payload;
+  }
+
+  // 1. Remove parameters the user chose not to send
+  if (modelConfig.disableTemperature) {
+    delete payload.temperature;
+  }
+  if (modelConfig.disableTopP) {
+    delete payload.top_p;
+  }
+  if (modelConfig.disablePresencePenalty) {
+    delete payload.presence_penalty;
+  }
+  if (modelConfig.disableFrequencyPenalty) {
+    delete payload.frequency_penalty;
+  }
+
+  // 2. Merge custom request parameters
+  const extraParamsStr = modelConfig.extraParams;
+  if (extraParamsStr && extraParamsStr.trim().length > 0) {
+    try {
+      const extra = JSON.parse(extraParamsStr);
+      if (extra && typeof extra === "object" && !Array.isArray(extra)) {
+        Object.keys(extra).forEach((key) => {
+          if (!PROTECTED_PAYLOAD_KEYS.has(key)) {
+            payload[key] = extra[key];
+          } else {
+            console.warn(
+              `[applyModelConfigExtras] skip protected key "${key}"`,
+            );
+          }
+        });
+      } else {
+        console.warn(
+          "[applyModelConfigExtras] extraParams must be a JSON object, got:",
+          extra,
+        );
+      }
+    } catch (e) {
+      console.warn("[applyModelConfigExtras] invalid extraParams JSON:", e);
+    }
+  }
+
+  return payload;
+}
diff --git a/app/client/platforms/ai302.ts b/app/client/platforms/ai302.ts
index 7bd18f96d4c..83bad21ce87 100644
--- a/app/client/platforms/ai302.ts
+++ b/app/client/platforms/ai302.ts
@@ -20,6 +20,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import {
@@ -117,6 +118,8 @@ export class Ai302Api implements LLMApi {
       // Please do not ask me why not send max_tokens, no reason, this param is just shit, I dont want to explain anymore.
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] openai payload: ", requestPayload);
 
     const shouldStream = !!options.config.stream;
diff --git a/app/client/platforms/alibaba.ts b/app/client/platforms/alibaba.ts
index 4875e5c02d9..b844af90230 100644
--- a/app/client/platforms/alibaba.ts
+++ b/app/client/platforms/alibaba.ts
@@ -19,6 +19,7 @@ import {
   SpeechOptions,
   MultimodalContent,
   MultimodalContentForAlibaba,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import {
@@ -132,6 +133,18 @@ export class QwenApi implements LLMApi {
       },
     };
 
+    // Alibaba nests temperature/top_p inside parameters, so handle the
+    // disable flags specifically for those nested fields
+    if (modelConfig.disableTemperature) {
+      delete (requestPayload.parameters as any).temperature;
+    }
+    if (modelConfig.disableTopP) {
+      delete (requestPayload.parameters as any).top_p;
+    }
+    // Merge custom extraParams at the top level; top-level disable flags
+    // are no-ops here because Alibaba does not use those top-level names
+    applyModelConfigExtras(modelConfig, requestPayload as any);
+
     const controller = new AbortController();
     options.onController?.(controller);
 
diff --git a/app/client/platforms/anthropic.ts b/app/client/platforms/anthropic.ts
index 2377470904f..1cece531323 100644
--- a/app/client/platforms/anthropic.ts
+++ b/app/client/platforms/anthropic.ts
@@ -1,5 +1,5 @@
 import { Anthropic, ApiPath } from "@/app/constant";
-import { ChatOptions, getHeaders, LLMApi, SpeechOptions } from "../api";
+import { ChatOptions, getHeaders, LLMApi, SpeechOptions, applyModelConfigExtras } from "../api";
 import {
   useAccessStore,
   useAppConfig,
@@ -191,6 +191,11 @@ export class ClaudeApi implements LLMApi {
       top_k: 5,
     };
 
+    // Apply disable flags (temperature/top_p) + merge custom extraParams
+    // presence_penalty / frequency_penalty are not supported by Anthropic,
+    // so those disable flags are effectively no-ops here
+    applyModelConfigExtras(modelConfig, requestBody as any);
+
     const path = this.path(Anthropic.ChatPath);
 
     const controller = new AbortController();
diff --git a/app/client/platforms/baidu.ts b/app/client/platforms/baidu.ts
index dc990db4103..31a2a247825 100644
--- a/app/client/platforms/baidu.ts
+++ b/app/client/platforms/baidu.ts
@@ -10,6 +10,7 @@ import {
   LLMModel,
   MultimodalContent,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import Locale from "../../locales";
 import {
@@ -117,6 +118,8 @@ export class ErnieApi implements LLMApi {
       top_p: modelConfig.top_p,
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] Baidu payload: ", requestPayload);
 
     const controller = new AbortController();
diff --git a/app/client/platforms/bytedance.ts b/app/client/platforms/bytedance.ts
index f9524cba28d..569ae930c70 100644
--- a/app/client/platforms/bytedance.ts
+++ b/app/client/platforms/bytedance.ts
@@ -15,6 +15,7 @@ import {
   LLMModel,
   MultimodalContent,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 
 import { streamWithThink } from "@/app/utils/chat";
@@ -113,6 +114,8 @@ export class DoubaoApi implements LLMApi {
       top_p: modelConfig.top_p,
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     const controller = new AbortController();
     options.onController?.(controller);
 
diff --git a/app/client/platforms/deepseek.ts b/app/client/platforms/deepseek.ts
index 1b38b40cc64..b65eee1560d 100644
--- a/app/client/platforms/deepseek.ts
+++ b/app/client/platforms/deepseek.ts
@@ -15,6 +15,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import {
@@ -115,6 +116,8 @@ export class DeepSeekApi implements LLMApi {
       // Please do not ask me why not send max_tokens, no reason, this param is just shit, I dont want to explain anymore.
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] openai payload: ", requestPayload);
 
     const shouldStream = !!options.config.stream;
diff --git a/app/client/platforms/glm.ts b/app/client/platforms/glm.ts
index 98b10277de9..2cd00ddaf01 100644
--- a/app/client/platforms/glm.ts
+++ b/app/client/platforms/glm.ts
@@ -14,6 +14,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import {
@@ -175,6 +176,11 @@ export class ChatGLMApi implements LLMApi {
     const requestPayload = this.createPayload(messages, modelConfig, options);
     const path = this.path(this.getModelPath(modelType));
 
+    // Apply disable flags + merge custom extraParams (chat only; skip for image/video)
+    if (modelType !== "image" && modelType !== "video") {
+      applyModelConfigExtras(modelConfig, requestPayload as any);
+    }
+
     console.log(`[Request] glm ${modelType} payload: `, requestPayload);
 
     const controller = new AbortController();
diff --git a/app/client/platforms/google.ts b/app/client/platforms/google.ts
index 654f0e3e4c7..f0d45b82c28 100644
--- a/app/client/platforms/google.ts
+++ b/app/client/platforms/google.ts
@@ -6,6 +6,7 @@ import {
   LLMModel,
   LLMUsage,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import {
   useAccessStore,
@@ -181,6 +182,19 @@ export class GeminiProApi implements LLMApi {
       ],
     };
 
+    // Google nests temperature/topP inside generationConfig, so handle the
+    // disable flags specifically for those nested fields
+    if (modelConfig.disableTemperature) {
+      delete requestPayload.generationConfig.temperature;
+    }
+    if (modelConfig.disableTopP) {
+      delete requestPayload.generationConfig.topP;
+    }
+    // Merge custom extraParams at the top level; top-level disable flags
+    // (temperature/top_p/presence_penalty/frequency_penalty) are no-ops here
+    // because Google does not use those top-level field names
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     let shouldStream = !!options.config.stream;
     const controller = new AbortController();
     options.onController?.(controller);
diff --git a/app/client/platforms/iflytek.ts b/app/client/platforms/iflytek.ts
index cfc37b3b256..6048a996e51 100644
--- a/app/client/platforms/iflytek.ts
+++ b/app/client/platforms/iflytek.ts
@@ -13,6 +13,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import Locale from "../../locales";
 import {
@@ -92,6 +93,8 @@ export class SparkApi implements LLMApi {
       // Please do not ask me why not send max_tokens, no reason, this param is just shit, I dont want to explain anymore.
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] Spark payload: ", requestPayload);
 
     const shouldStream = !!options.config.stream;
diff --git a/app/client/platforms/moonshot.ts b/app/client/platforms/moonshot.ts
index b6812c0d766..a292d9666d5 100644
--- a/app/client/platforms/moonshot.ts
+++ b/app/client/platforms/moonshot.ts
@@ -20,6 +20,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import { getMessageTextContent } from "@/app/utils";
@@ -92,6 +93,8 @@ export class MoonshotApi implements LLMApi {
       // Please do not ask me why not send max_tokens, no reason, this param is just shit, I dont want to explain anymore.
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] openai payload: ", requestPayload);
 
     const shouldStream = !!options.config.stream;
diff --git a/app/client/platforms/openai.ts b/app/client/platforms/openai.ts
index cfbff99e978..bc0bfd41512 100644
--- a/app/client/platforms/openai.ts
+++ b/app/client/platforms/openai.ts
@@ -34,6 +34,7 @@ import {
   LLMUsage,
   MultimodalContent,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import Locale from "../../locales";
 import { getClientConfig } from "@/app/config/client";
@@ -263,6 +264,9 @@ export class ChatGPTApi implements LLMApi {
       if (visionModel && !isO1OrO3 && ! isGpt5) {
         requestPayload["max_tokens"] = Math.max(modelConfig.max_tokens, 4000);
       }
+
+      // Apply disable flags + merge custom extraParams (chat only; skip for Dalle3)
+      requestPayload = applyModelConfigExtras(modelConfig, requestPayload as any) as any;
     }
 
     console.log("[Request] openai payload: ", requestPayload);
diff --git a/app/client/platforms/siliconflow.ts b/app/client/platforms/siliconflow.ts
index 34f0844c328..a09c3c01166 100644
--- a/app/client/platforms/siliconflow.ts
+++ b/app/client/platforms/siliconflow.ts
@@ -20,6 +20,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import {
@@ -117,6 +118,8 @@ export class SiliconflowApi implements LLMApi {
       // Please do not ask me why not send max_tokens, no reason, this param is just shit, I dont want to explain anymore.
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] openai payload: ", requestPayload);
 
     const shouldStream = !!options.config.stream;
diff --git a/app/client/platforms/tencent.ts b/app/client/platforms/tencent.ts
index 8adeb1b3ea7..d563ce50a0f 100644
--- a/app/client/platforms/tencent.ts
+++ b/app/client/platforms/tencent.ts
@@ -9,6 +9,7 @@ import {
   LLMModel,
   MultimodalContent,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import Locale from "../../locales";
 import {
@@ -113,13 +114,24 @@ export class HunyuanApi implements LLMApi {
       },
     };
 
-    const requestPayload: RequestPayload = capitalizeKeys({
+    // Tencent payload keys get uppercased by capitalizeKeys, so construct the
+    // raw object conditionally based on disable flags before capitalizing
+    const basePayload: Record<string, any> = {
       model: modelConfig.model,
       messages,
-      temperature: modelConfig.temperature,
-      top_p: modelConfig.top_p,
       stream: options.config.stream,
-    });
+    };
+    if (!modelConfig.disableTemperature) {
+      basePayload.temperature = modelConfig.temperature;
+    }
+    if (!modelConfig.disableTopP) {
+      basePayload.top_p = modelConfig.top_p;
+    }
+    const requestPayload: RequestPayload = capitalizeKeys(basePayload);
+
+    // Merge custom extraParams (top-level). Top-level disable flags are no-ops
+    // here because all keys have been capitalized already
+    applyModelConfigExtras(modelConfig, requestPayload as any);
 
     console.log("[Request] Tencent payload: ", requestPayload);
 
diff --git a/app/client/platforms/xai.ts b/app/client/platforms/xai.ts
index 830ad4778ac..76814a84cff 100644
--- a/app/client/platforms/xai.ts
+++ b/app/client/platforms/xai.ts
@@ -15,6 +15,7 @@ import {
   LLMApi,
   LLMModel,
   SpeechOptions,
+  applyModelConfigExtras,
 } from "../api";
 import { getClientConfig } from "@/app/config/client";
 import { getTimeoutMSByModel } from "@/app/utils";
@@ -86,6 +87,8 @@ export class XAIApi implements LLMApi {
       top_p: modelConfig.top_p,
     };
 
+    applyModelConfigExtras(modelConfig, requestPayload);
+
     console.log("[Request] xai payload: ", requestPayload);
 
     const shouldStream = !!options.config.stream;
diff --git a/app/components/input-range.tsx b/app/components/input-range.tsx
index 3c6b4982579..79fe6931d30 100644
--- a/app/components/input-range.tsx
+++ b/app/components/input-range.tsx
@@ -11,6 +11,7 @@ interface InputRangeProps {
   max: string;
   step: string;
   aria: string;
+  disabled?: boolean;
 }
 
 export function InputRange({
@@ -22,6 +23,7 @@ export function InputRange({
   max,
   step,
   aria,
+  disabled,
 }: InputRangeProps) {
   return (
     <div className={clsx(styles["input-range"], className)}>
@@ -35,6 +37,7 @@ export function InputRange({
         max={max}
         step={step}
         onChange={onChange}
+        disabled={disabled}
       ></input>
     </div>
   );
diff --git a/app/components/model-config.module.scss b/app/components/model-config.module.scss
index 40ba03f8657..9992a0bcd32 100644
--- a/app/components/model-config.module.scss
+++ b/app/components/model-config.module.scss
@@ -5,3 +5,43 @@
     white-space: normal;
   }
 }
+
+.param-with-toggle {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  width: 100%;
+}
+
+.param-disable-label {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 12px;
+  color: var(--black);
+  opacity: 0.7;
+  cursor: pointer;
+  user-select: none;
+
+  input[type="checkbox"] {
+    cursor: pointer;
+  }
+}
+
+.extra-params-input {
+  width: 100%;
+  min-height: 80px;
+  resize: vertical;
+  font-family: monospace;
+  font-size: 12px;
+  padding: 8px;
+  border-radius: 8px;
+  border: 1px solid var(--border-in-light);
+  background: var(--white);
+  color: var(--black);
+  box-sizing: border-box;
+
+  &::placeholder {
+    color: var(--gray);
+  }
+}
diff --git a/app/components/model-config.tsx b/app/components/model-config.tsx
index e845bfeac7a..d8eb64db70b 100644
--- a/app/components/model-config.tsx
+++ b/app/components/model-config.tsx
@@ -53,41 +53,72 @@ export function ModelConfigList(props: {
         title={Locale.Settings.Temperature.Title}
         subTitle={Locale.Settings.Temperature.SubTitle}
       >
-        <InputRange
-          aria={Locale.Settings.Temperature.Title}
-          value={props.modelConfig.temperature?.toFixed(1)}
-          min="0"
-          max="1" // lets limit it to 0-1
-          step="0.1"
-          onChange={(e) => {
-            props.updateConfig(
-              (config) =>
-                (config.temperature = ModalConfigValidator.temperature(
-                  e.currentTarget.valueAsNumber,
-                )),
-            );
-          }}
-        ></InputRange>
+        <div className={styles["param-with-toggle"]}>
+          <InputRange
+            aria={Locale.Settings.Temperature.Title}
+            value={props.modelConfig.temperature?.toFixed(1)}
+            min="0"
+            max="1" // lets limit it to 0-1
+            step="0.1"
+            disabled={props.modelConfig.disableTemperature}
+            onChange={(e) => {
+              props.updateConfig(
+                (config) =>
+                  (config.temperature = ModalConfigValidator.temperature(
+                    e.currentTarget.valueAsNumber,
+                  )),
+              );
+            }}
+          ></InputRange>
+          <label className={styles["param-disable-label"]}>
+            <input
+              type="checkbox"
+              checked={props.modelConfig.disableTemperature}
+              onChange={(e) =>
+                props.updateConfig(
+                  (config) =>
+                    (config.disableTemperature = e.currentTarget.checked),
+                )
+              }
+            />
+            <span>{Locale.Settings.DisableParam}</span>
+          </label>
+        </div>
       </ListItem>
       <ListItem
         title={Locale.Settings.TopP.Title}
         subTitle={Locale.Settings.TopP.SubTitle}
       >
-        <InputRange
-          aria={Locale.Settings.TopP.Title}
-          value={(props.modelConfig.top_p ?? 1).toFixed(1)}
-          min="0"
-          max="1"
-          step="0.1"
-          onChange={(e) => {
-            props.updateConfig(
-              (config) =>
-                (config.top_p = ModalConfigValidator.top_p(
-                  e.currentTarget.valueAsNumber,
-                )),
-            );
-          }}
-        ></InputRange>
+        <div className={styles["param-with-toggle"]}>
+          <InputRange
+            aria={Locale.Settings.TopP.Title}
+            value={(props.modelConfig.top_p ?? 1).toFixed(1)}
+            min="0"
+            max="1"
+            step="0.1"
+            disabled={props.modelConfig.disableTopP}
+            onChange={(e) => {
+              props.updateConfig(
+                (config) =>
+                  (config.top_p = ModalConfigValidator.top_p(
+                    e.currentTarget.valueAsNumber,
+                  )),
+              );
+            }}
+          ></InputRange>
+          <label className={styles["param-disable-label"]}>
+            <input
+              type="checkbox"
+              checked={props.modelConfig.disableTopP}
+              onChange={(e) =>
+                props.updateConfig(
+                  (config) => (config.disableTopP = e.currentTarget.checked),
+                )
+              }
+            />
+            <span>{Locale.Settings.DisableParam}</span>
+          </label>
+        </div>
       </ListItem>
       <ListItem
         title={Locale.Settings.MaxTokens.Title}
@@ -116,44 +147,78 @@ export function ModelConfigList(props: {
             title={Locale.Settings.PresencePenalty.Title}
             subTitle={Locale.Settings.PresencePenalty.SubTitle}
           >
-            <InputRange
-              aria={Locale.Settings.PresencePenalty.Title}
-              value={props.modelConfig.presence_penalty?.toFixed(1)}
-              min="-2"
-              max="2"
-              step="0.1"
-              onChange={(e) => {
-                props.updateConfig(
-                  (config) =>
-                    (config.presence_penalty =
-                      ModalConfigValidator.presence_penalty(
-                        e.currentTarget.valueAsNumber,
-                      )),
-                );
-              }}
-            ></InputRange>
+            <div className={styles["param-with-toggle"]}>
+              <InputRange
+                aria={Locale.Settings.PresencePenalty.Title}
+                value={props.modelConfig.presence_penalty?.toFixed(1)}
+                min="-2"
+                max="2"
+                step="0.1"
+                disabled={props.modelConfig.disablePresencePenalty}
+                onChange={(e) => {
+                  props.updateConfig(
+                    (config) =>
+                      (config.presence_penalty =
+                        ModalConfigValidator.presence_penalty(
+                          e.currentTarget.valueAsNumber,
+                        )),
+                  );
+                }}
+              ></InputRange>
+              <label className={styles["param-disable-label"]}>
+                <input
+                  type="checkbox"
+                  checked={props.modelConfig.disablePresencePenalty}
+                  onChange={(e) =>
+                    props.updateConfig(
+                      (config) =>
+                        (config.disablePresencePenalty =
+                          e.currentTarget.checked),
+                    )
+                  }
+                />
+                <span>{Locale.Settings.DisableParam}</span>
+              </label>
+            </div>
           </ListItem>
 
           <ListItem
             title={Locale.Settings.FrequencyPenalty.Title}
             subTitle={Locale.Settings.FrequencyPenalty.SubTitle}
           >
-            <InputRange
-              aria={Locale.Settings.FrequencyPenalty.Title}
-              value={props.modelConfig.frequency_penalty?.toFixed(1)}
-              min="-2"
-              max="2"
-              step="0.1"
-              onChange={(e) => {
-                props.updateConfig(
-                  (config) =>
-                    (config.frequency_penalty =
-                      ModalConfigValidator.frequency_penalty(
-                        e.currentTarget.valueAsNumber,
-                      )),
-                );
-              }}
-            ></InputRange>
+            <div className={styles["param-with-toggle"]}>
+              <InputRange
+                aria={Locale.Settings.FrequencyPenalty.Title}
+                value={props.modelConfig.frequency_penalty?.toFixed(1)}
+                min="-2"
+                max="2"
+                step="0.1"
+                disabled={props.modelConfig.disableFrequencyPenalty}
+                onChange={(e) => {
+                  props.updateConfig(
+                    (config) =>
+                      (config.frequency_penalty =
+                        ModalConfigValidator.frequency_penalty(
+                          e.currentTarget.valueAsNumber,
+                        )),
+                  );
+                }}
+              ></InputRange>
+              <label className={styles["param-disable-label"]}>
+                <input
+                  type="checkbox"
+                  checked={props.modelConfig.disableFrequencyPenalty}
+                  onChange={(e) =>
+                    props.updateConfig(
+                      (config) =>
+                        (config.disableFrequencyPenalty =
+                          e.currentTarget.checked),
+                    )
+                  }
+                />
+                <span>{Locale.Settings.DisableParam}</span>
+              </label>
+            </div>
           </ListItem>
 
           <ListItem
@@ -268,6 +333,24 @@ export function ModelConfigList(props: {
             ))}
         </Select>
       </ListItem>
+      <ListItem
+        title={Locale.Settings.ExtraParams.Title}
+        subTitle={Locale.Settings.ExtraParams.SubTitle}
+      >
+        <textarea
+          className={styles["extra-params-input"]}
+          aria-label={Locale.Settings.ExtraParams.Title}
+          value={props.modelConfig.extraParams}
+          placeholder={Locale.Settings.ExtraParams.Placeholder}
+          spellCheck={false}
+          rows={4}
+          onChange={(e) =>
+            props.updateConfig(
+              (config) => (config.extraParams = e.currentTarget.value),
+            )
+          }
+        />
+      </ListItem>
     </>
   );
 }
diff --git a/app/locales/cn.ts b/app/locales/cn.ts
index 2cb7dd1e535..112bc10781c 100644
--- a/app/locales/cn.ts
+++ b/app/locales/cn.ts
@@ -576,6 +576,14 @@ const cn = {
       Title: "频率惩罚度 (frequency_penalty)",
       SubTitle: "值越大，越有可能降低重复字词",
     },
+    DisableParam: "不提供（采用模型提供商默认）",
+    ExtraParams: {
+      Title: "自定义请求参数",
+      SubTitle:
+        "以 JSON 格式追加自定义请求参数（如 thinking）。messages/model/stream 等核心字段会被保护，不会被覆盖",
+      Placeholder:
+        '例如：\n{"thinking":{"type":"disabled"}}\n注意：仅会合并到顶层请求体，不会覆盖受保护字段',
+    },
     TTS: {
       Enable: {
         Title: "启用文本转语音",
diff --git a/app/locales/en.ts b/app/locales/en.ts
index a6d1919045c..3090be30199 100644
--- a/app/locales/en.ts
+++ b/app/locales/en.ts
@@ -583,6 +583,14 @@ const en: LocaleType = {
       SubTitle:
         "A larger value decreasing the likelihood to repeat the same line",
     },
+    DisableParam: "Do not send (use provider default)",
+    ExtraParams: {
+      Title: "Custom Request Parameters",
+      SubTitle:
+        "Append custom request parameters as JSON (e.g. thinking). Core fields like messages/model/stream are protected and will not be overwritten",
+      Placeholder:
+        'e.g.\n{"thinking":{"type":"disabled"}}\nNote: merged into the top-level request body only; protected fields are skipped',
+    },
     TTS: {
       Enable: {
         Title: "Enable TTS",
diff --git a/app/store/config.ts b/app/store/config.ts
index 45e21b02697..d0c60294d47 100644
--- a/app/store/config.ts
+++ b/app/store/config.ts
@@ -78,6 +78,13 @@ export const DEFAULT_CONFIG = {
     compressProviderName: "",
     enableInjectSystemPrompts: true,
     template: config?.template ?? DEFAULT_INPUT_TEMPLATE,
+    // Omit these parameters (use provider defaults instead)
+    disableTemperature: false,
+    disableTopP: false,
+    disablePresencePenalty: false,
+    disableFrequencyPenalty: false,
+    // Custom request parameters (JSON string, merged into the request payload)
+    extraParams: "",
     size: "1024x1024" as ModelSize,
     quality: "standard" as DalleQuality,
     style: "vivid" as DalleStyle,
@@ -195,7 +202,7 @@ export const useAppConfig = createPersistStore(
   }),
   {
     name: StoreKey.Config,
-    version: 4.1,
+    version: 4.3,
 
     merge(persistedState, currentState) {
       const state = persistedState as ChatConfig | undefined;
@@ -255,6 +262,17 @@ export const useAppConfig = createPersistStore(
           DEFAULT_CONFIG.modelConfig.compressProviderName;
       }
 
+      if (version < 4.2) {
+        state.enableMcp = DEFAULT_CONFIG.enableMcp;
+      }
+
+      if (version < 4.3) {
+        state.modelConfig.disableTemperature = false;
+        state.modelConfig.disableTopP = false;
+        state.modelConfig.disablePresencePenalty = false;
+        state.modelConfig.disableFrequencyPenalty = false;
+        state.modelConfig.extraParams = "";
+      }
       return state as any;
     },
   },