diff --git a/src/apis/trans.js b/src/apis/trans.js
index 1f8f8e86..4e32cbf2 100644
--- a/src/apis/trans.js
+++ b/src/apis/trans.js
@@ -42,6 +42,7 @@ import {
   INPUT_PLACE_TO_LANG,
   INPUT_PLACE_FROM_LANG,
   INPUT_PLACE_GLOSSARY,
+  defaultSystemPromptJsonFinalTranslation,
   defaultSystemPromptXml,
   defaultSystemPromptLines,
   INPUT_PLACE_SUMMARY,
@@ -74,7 +75,7 @@ import { getDocInfo } from "../libs/docInfo";
 const keyMap = new Map();
 const urlMap = new Map();
 
-// 轮询key/url
+// Rotate key/url
 const keyPick = (apiSlug, key = "", cacheMap) => {
   const keys = key
     .split(/\n|,/)
@@ -117,8 +118,8 @@ const genUserPrompt = ({
   nobatchUserPrompt,
   useBatchFetch,
   tone,
-  glossary = {}, // 规则中的AI专业术语
-  aiTerms = "", // 接口中的AI专业术语
+  glossary = {},
+  aiTerms = "",
   from,
   to,
   fromLang,
@@ -135,7 +136,7 @@ const genUserPrompt = ({
     title && (promptObj.title = title);
     description && (promptObj.description = description);
 
-    // 合并规则与接口中的AI专业术语
+    // Merge glossary from rules and API settings.
     if (aiTerms) {
       const aiGlossary = parseAITerms(aiTerms);
       glossary = { ...glossary, ...aiGlossary };
@@ -185,54 +186,72 @@ const genSubtitlePrompt = ({
     .replaceAll(INPUT_PLACE_TO_LANG, toLang);
 };
 
-const parseAIRes = (raw, useBatchFetch = true) => {
+const parseAIRes = (raw, useBatchFetch = true, useJsonResponseFormat = false) => {
   if (!raw) {
     return [];
   }
 
+  const getJsonString = (content) => {
+    const objectStart = content.indexOf("{");
+    const arrayStart = content.indexOf("[");
+    const starts = [objectStart, arrayStart].filter((index) => index !== -1);
+    if (starts.length === 0) return "";
+
+    const start = Math.min(...starts);
+    const closeChar = content[start] === "{" ? "}" : "]";
+    const end = content.lastIndexOf(closeChar);
+
+    return end > start ? content.substring(start, end + 1) : "";
+  };
+
   if (!useBatchFetch) {
+    if (useJsonResponseFormat) {
+      try {
+        const content = stripMarkdownCodeBlock(raw).trim();
+        const jsonStr = getJsonString(content);
+        if (jsonStr) {
+          const parsed = JSON.parse(jsonStr);
+          const text =
+            parsed.finaltranslation ?? parsed.text ?? parsed.translation ?? raw;
+          return [[text, parsed.sourceLanguage]];
+        }
+      } catch {
+        // fallback to raw
+      }
+    }
     return [[raw]];
   }
 
-  // try {
-  //   const jsonString = extractJson(raw);
-  //   if (!jsonString) return [];
-
-  //   const data = JSON.parse(jsonString);
-  //   if (Array.isArray(data.translations)) {
-  //     // todo: 考虑序号id可能会打乱
-  //     return data.translations.map((item) => [
-  //       item?.text ?? "",
-  //       item?.sourceLanguage ?? "",
-  //     ]);
-  //   }
-  // } catch (err) {
-  //   kissLog("parse AI Res", err);
-  // }
-  // return [];
-
   let content = stripMarkdownCodeBlock(raw).trim();
 
   // JSON
   try {
-    const start = content.search(/(\{|\[)/);
-    const end = content.lastIndexOf(content.includes("}") ? "}" : "]");
-
-    if (start > -1 && end > -1) {
-      const jsonStr = content.substring(start, end + 1);
+    const jsonStr = getJsonString(content);
+    if (jsonStr) {
       const parsed = JSON.parse(jsonStr);
 
       const list = Array.isArray(parsed)
         ? parsed
         : parsed.translations || (parsed.result ? [parsed.result] : [parsed]);
 
-      if (
-        list.length > 0 &&
-        (list[0].text !== undefined || list[0].translations)
-      ) {
+      if (Array.isArray(parsed?.translations) && list.length === 0) {
+        return [];
+      }
+
+      const hasTranslationField = list.some(
+        (item) =>
+          item &&
+          (item.finaltranslation !== undefined ||
+            item.text !== undefined ||
+            item.translation !== undefined)
+      );
+
+      if (list.length > 0 && hasTranslationField) {
         return list.map((item) => [
-          decodeHTMLEntities(String(item.text || "")),
-          String(item.sourceLanguage || ""),
+          decodeHTMLEntities(
+            String(item.finaltranslation ?? item.text ?? item.translation ?? "")
+          ),
+          String(item.sourceLanguage || item.src || ""),
         ]);
       }
     }
@@ -259,7 +278,7 @@ const parseAIRes = (raw, useBatchFetch = true) => {
     }
   }
 
-  // 纯文本换行
+  // Plain text lines
   return content.split("\n").map((line) => {
     const pipeMatch = line.match(/^\d+\s*\|\s*(.*)/);
     if (pipeMatch) {
@@ -290,7 +309,13 @@ const parseSTRes = (raw) => {
   return [];
 };
 
-const siliconflowEffortMap = { max: 32768, high: 16384, medium: 8192, low: 4096, minimal: 2048 };
+const siliconflowEffortMap = {
+  max: 32768,
+  high: 16384,
+  medium: 8192,
+  low: 4096,
+  minimal: 2048,
+};
 
 const injectThinking = (body, { apiType, thinkingMode, thinkingEffort }) => {
   if (thinkingMode === "auto") return;
@@ -302,7 +327,9 @@ const injectThinking = (body, { apiType, thinkingMode, thinkingEffort }) => {
 
   switch (param.type) {
     case "deepseek":
-      body.thinking = { type: thinkingMode === "enabled" ? "enabled" : "disabled" };
+      body.thinking = {
+        type: thinkingMode === "enabled" ? "enabled" : "disabled",
+      };
       if (thinkingMode === "enabled" && hasEffort) {
         body.reasoning_effort = thinkingEffort;
       }
@@ -336,6 +363,62 @@ const injectThinking = (body, { apiType, thinkingMode, thinkingEffort }) => {
   }
 };
 
+const getJsonResponseFormatSchema = ({ useBatchFetch }) => ({
+  type: "json_schema",
+  json_schema: {
+    name: useBatchFetch ? "kiss_batch_translation" : "kiss_translation",
+    strict: true,
+    schema: useBatchFetch
+      ? {
+          type: "object",
+          additionalProperties: false,
+          properties: {
+            translations: {
+              type: "array",
+              items: {
+                type: "object",
+                additionalProperties: false,
+                properties: {
+                  id: { type: "integer" },
+                  finaltranslation: { type: "string" },
+                  sourceLanguage: { type: "string" },
+                  reasoning: { type: "string" },
+                },
+                required: [
+                  "id",
+                  "finaltranslation",
+                  "sourceLanguage",
+                  "reasoning",
+                ],
+              },
+            },
+          },
+          required: ["translations"],
+        }
+      : {
+          type: "object",
+          additionalProperties: false,
+          properties: {
+            finaltranslation: { type: "string" },
+            sourceLanguage: { type: "string" },
+            reasoning: { type: "string" },
+          },
+          required: ["finaltranslation", "sourceLanguage", "reasoning"],
+        },
+  },
+});
+
+const injectJsonResponseFormat = (
+  body,
+  { apiType, useJsonResponseFormat, useBatchFetch }
+) => {
+  if (!useJsonResponseFormat || !API_SPE_TYPES.openaiCompatible.has(apiType)) {
+    return;
+  }
+
+  body.response_format = getJsonResponseFormatSchema({ useBatchFetch });
+};
+
 const genGoogle = ({ texts, from, to, url, key }) => {
   const params = queryString.stringify({
     client: "gtx",
@@ -484,6 +567,8 @@ const genOpenAI = ({
   maxTokens,
   hisMsgs = [],
   useStream = false,
+  useBatchFetch,
+  useJsonResponseFormat,
   apiType,
   thinkingMode,
   thinkingEffort,
@@ -508,6 +593,11 @@ const genOpenAI = ({
   };
 
   injectThinking(body, { apiType, thinkingMode, thinkingEffort });
+  injectJsonResponseFormat(body, {
+    apiType,
+    useJsonResponseFormat,
+    useBatchFetch,
+  });
 
   const headers = {
     "Content-type": "application/json",
@@ -535,7 +625,7 @@ const genGemini = ({
     .replaceAll(INPUT_PLACE_MODEL, model)
     .replaceAll(INPUT_PLACE_KEY, key);
 
-  // 流式传输使用 streamGenerateContent 端点
+  // Streaming uses the streamGenerateContent endpoint.
   if (useStream) {
     url = url.replace(":generateContent", ":streamGenerateContent");
     url += (url.includes("?") ? "&" : "?") + "alt=sse";
@@ -611,6 +701,8 @@ const genGemini2 = ({
   hisMsgs = [],
   useStream = false,
   apiType,
+  useBatchFetch,
+  useJsonResponseFormat,
   thinkingMode,
   thinkingEffort,
 }) => {
@@ -634,6 +726,11 @@ const genGemini2 = ({
   };
 
   injectThinking(body, { apiType, thinkingMode, thinkingEffort });
+  injectJsonResponseFormat(body, {
+    apiType,
+    useJsonResponseFormat,
+    useBatchFetch,
+  });
 
   const headers = {
     "Content-type": "application/json",
@@ -698,6 +795,9 @@ const genOpenRouter = ({
   maxTokens,
   hisMsgs = [],
   useStream = false,
+  apiType,
+  useBatchFetch,
+  useJsonResponseFormat,
   thinkingMode,
   thinkingEffort,
 }) => {
@@ -720,7 +820,16 @@ const genOpenRouter = ({
     stream: useStream,
   };
 
-  injectThinking(body, { apiType: OPT_TRANS_OPENROUTER, thinkingMode, thinkingEffort });
+  injectThinking(body, {
+    apiType: OPT_TRANS_OPENROUTER,
+    thinkingMode,
+    thinkingEffort,
+  });
+  injectJsonResponseFormat(body, {
+    apiType: apiType || OPT_TRANS_OPENROUTER,
+    useJsonResponseFormat,
+    useBatchFetch,
+  });
 
   const headers = {
     "Content-type": "application/json",
@@ -740,6 +849,9 @@ const genOllama = ({
   maxTokens,
   hisMsgs = [],
   useStream = false,
+  apiType,
+  useBatchFetch,
+  useJsonResponseFormat,
   thinkingMode,
   thinkingEffort,
 }) => {
@@ -761,7 +873,16 @@ const genOllama = ({
     max_tokens: maxTokens,
   };
 
-  injectThinking(body, { apiType: OPT_TRANS_OLLAMA, thinkingMode, thinkingEffort });
+  injectThinking(body, {
+    apiType: OPT_TRANS_OLLAMA,
+    thinkingMode,
+    thinkingEffort,
+  });
+  injectJsonResponseFormat(body, {
+    apiType: apiType || OPT_TRANS_OLLAMA,
+    useJsonResponseFormat,
+    useBatchFetch,
+  });
   body.stream = useStream;
 
   const headers = {
@@ -862,7 +983,7 @@ const genInit = ({
 };
 
 /**
- * 构造翻译接口请求参数
+ * Build translation request parameters.
  * @param {*}
  * @returns
  */
@@ -931,7 +1052,7 @@ export const genTransReq = async ({ reqHook, ...args }) => {
           tone,
         });
 
-    // 上下文回退：当 prompt 模板缺少占位符时，追加 # Context 块
+    // Add missing context fields when the prompt template has no placeholders.
     if (hasExternalDocInfo) {
       const template = events
         ? subtitlePrompt
@@ -966,6 +1087,10 @@ export const genTransReq = async ({ reqHook, ...args }) => {
           glossary,
           aiTerms,
         });
+
+    if (events) {
+      args.useJsonResponseFormat = false;
+    }
   }
 
   const {
@@ -976,7 +1101,7 @@ export const genTransReq = async ({ reqHook, ...args }) => {
     method = "POST",
   } = genReqFuncs[apiType](args);
 
-  // 合并用户自定义headers和body
+  // Merge user custom headers and body.
   if (customHeader?.trim()) {
     Object.assign(headers, parseJsonObj(customHeader));
   }
@@ -984,7 +1109,7 @@ export const genTransReq = async ({ reqHook, ...args }) => {
     Object.assign(body, parseJsonObj(customBody));
   }
 
-  // 执行 request hook
+  // Run request hook.
   if (reqHook?.trim() && !events) {
     try {
       const req = {
@@ -999,6 +1124,7 @@ export const genTransReq = async ({ reqHook, ...args }) => {
         {
           ...args,
           defaultSystemPrompt,
+          defaultSystemPromptJsonFinalTranslation,
           defaultSystemPromptXml,
           defaultSystemPromptLines,
           defaultSubtitlePrompt,
@@ -1021,7 +1147,7 @@ export const genTransReq = async ({ reqHook, ...args }) => {
 };
 
 /**
- * 解析翻译接口返回数据
+ * Parse translation API response data.
  * @param {*} res
  * @param {*} param3
  * @returns
@@ -1041,9 +1167,10 @@ export const parseTransRes = async (
     userMsg,
     apiType,
     useBatchFetch,
+    useJsonResponseFormat,
   }
 ) => {
-  // 执行 response hook
+  // Run response hook.
   if (resHook?.trim()) {
     try {
       interpreter.run(`exports.resHook = ${resHook}`);
@@ -1076,7 +1203,7 @@ export const parseTransRes = async (
 
   let modelMsg = "";
 
-  // todo: 根据结果抛出实际异常信息
+  // todo: throw actual API error information.
   switch (apiType) {
     case OPT_TRANS_GOOGLE:
       return [[res?.sentences?.map((item) => item.trans).join(" "), res?.src]];
@@ -1135,13 +1262,13 @@ export const parseTransRes = async (
           content: modelMsg.content,
         });
       }
-      return parseAIRes(modelMsg?.content, useBatchFetch);
+      return parseAIRes(modelMsg?.content, useBatchFetch, useJsonResponseFormat);
     case OPT_TRANS_GEMINI:
       modelMsg = res?.candidates?.[0]?.content;
       if (history && userMsg && modelMsg) {
         history.add(userMsg, modelMsg);
       }
-      return parseAIRes(modelMsg?.parts?.[0]?.text ?? "", useBatchFetch);
+      return parseAIRes(modelMsg?.parts?.[0]?.text ?? "", useBatchFetch, useJsonResponseFormat);
     case OPT_TRANS_CLAUDE:
       modelMsg = { role: res?.role, content: res?.content?.text };
       if (history && userMsg && modelMsg) {
@@ -1150,7 +1277,7 @@ export const parseTransRes = async (
           content: modelMsg.content,
         });
       }
-      return parseAIRes(res?.content?.[0]?.text ?? "", useBatchFetch);
+      return parseAIRes(res?.content?.[0]?.text ?? "", useBatchFetch, useJsonResponseFormat);
     case OPT_TRANS_CLOUDFLAREAI:
       return [[res?.result?.translated_text]];
     case OPT_TRANS_OLLAMA:
@@ -1169,7 +1296,7 @@ export const parseTransRes = async (
           content: modelMsg.content,
         });
       }
-      return parseAIRes(modelMsg?.content, useBatchFetch);
+      return parseAIRes(modelMsg?.content, useBatchFetch, useJsonResponseFormat);
     case OPT_TRANS_CUSTOMIZE:
       if (useBatchFetch) {
         return (res?.translations ?? res)?.map((item) => [item.text, item.src]);
@@ -1182,12 +1309,12 @@ export const parseTransRes = async (
 };
 
 /**
- * 发送翻译请求并解析
- * 支持流式和非流式两种模式
- * @param {*} texts 待翻译文本数组
- * @param {*} options 翻译选项
- * @yields {{id: number, result: [string, string]}} 流式模式下逐个返回结果
- * @returns {Promise<Array>} 非流式模式下返回完整结果数组
+ * Send translation request and parse response.
+ * Supports streaming and non-streaming modes.
+ * @param {*} texts texts to translate
+ * @param {*} options translation options
+ * @yields {{id: number, result: [string, string]}}
+ * @returns {Promise<Array>}
  */
 export async function* handleTranslate(
   texts = [],
@@ -1290,13 +1417,22 @@ export async function* handleTranslate(
 }
 
 /**
- * 内部流式翻译处理
+ * Internal streaming translation handler.
  */
 async function* handleTranslateStreamInternal(
   texts,
   input,
   init,
-  { apiType, history, userMsg, usePool, fetchInterval, fetchLimit, httpTimeout, streamRenderMode }
+  {
+    apiType,
+    history,
+    userMsg,
+    usePool,
+    fetchInterval,
+    fetchLimit,
+    httpTimeout,
+    streamRenderMode,
+  }
 ) {
   const results = new Array(texts.length).fill(null);
   let fullContent = "";
@@ -1329,7 +1465,7 @@ async function* handleTranslateStreamInternal(
             if (detected) {
               formatDetected = true;
               isJsonFormat = isJson;
-              // 格式检测成功后，将累积的内容写入解析器
+              // After format detection, feed accumulated content to parser.
               if (isJsonFormat) {
                 for (const { id, translation } of jsonParser.write(
                   fullContent
@@ -1353,7 +1489,7 @@ async function* handleTranslateStreamInternal(
               yield { id, result: translation };
             }
           }
-          // 实时渲染模式：yield 段落级中间态
+          // Realtime stream rendering emits partial segment text.
           if (realtimeParser && streamRenderMode === "realtime") {
             const items = realtimeParser.write(delta);
             for (const { id, partialText, isComplete } of items) {
@@ -1364,7 +1500,7 @@ async function* handleTranslateStreamInternal(
           }
         }
       } catch (e) {
-        // 忽略解析错误
+        // Ignore malformed stream chunks.
       }
     }
 
@@ -1376,7 +1512,7 @@ async function* handleTranslateStreamInternal(
     throw error;
   }
 
-  // 最终再解析一次，捕获可能遗漏的段落
+  // Parse once more at the end to catch missed segments.
   const hasEmpty = results.some((r) => !r);
   if (hasEmpty) {
     const parsed = parseAIRes(fullContent, true);
@@ -1404,7 +1540,7 @@ async function* handleTranslateStreamInternal(
 }
 
 /**
- * Microsoft语言识别聚合及解析
+ * Microsoft language detection aggregation and parsing.
  * @param {*} texts
  * @returns
  */
@@ -1433,7 +1569,7 @@ export const handleMicrosoftLangdetect = async (texts = []) => {
 };
 
 /**
- * 字幕翻译
+ * Subtitle translation.
  * @param {*} param0
  * @returns
  */
@@ -1485,7 +1621,7 @@ export const handleSubtitle = async ({
 };
 
 /**
- * 上下文摘要
+ * Context summary.
  * @param {*} param0
  * @returns
  */
@@ -1524,6 +1660,7 @@ export const handleSummarize = async ({
     fromLang: "auto",
     toLang: "en",
     useBatchFetch: false,
+    useJsonResponseFormat: false,
     nobatchPrompt: summarizeSystemPrompt,
     nobatchUserPrompt: userPrompt,
   });
diff --git a/src/config/api.js b/src/config/api.js
index 207d4434..7cb4cf77 100644
--- a/src/config/api.js
+++ b/src/config/api.js
@@ -202,6 +202,20 @@ export const API_SPE_TYPES = {
     OPT_TRANS_OPENROUTER,
     OPT_TRANS_EPHONEAI,
   ]),
+  // OpenAI compatible chat completions
+  openaiCompatible: new Set([
+    OPT_TRANS_OPENAI,
+    OPT_TRANS_DEEPSEEK,
+    OPT_TRANS_SILICONFLOW,
+    OPT_TRANS_XIAOMIMIMO,
+    OPT_TRANS_ALIYUNBAILIAN,
+    OPT_TRANS_CEREBRAS,
+    OPT_TRANS_ZAI,
+    OPT_TRANS_EPHONEAI,
+    OPT_TRANS_GEMINI_2,
+    OPT_TRANS_OPENROUTER,
+    OPT_TRANS_OLLAMA,
+  ]),
   // 赞助商
   sponsors: new Set([OPT_TRANS_EPHONEAI]),
 };
@@ -538,6 +552,25 @@ Output: {"translations":[{"id":1,"text":"一个<b>React</b>组件","sourceLangua
 
 Fail-safe: On any error, return {"translations":[]}.`;
 
+export const defaultSystemPromptJsonFinalTranslation = `Act as a translation API. Output one raw JSON object only. No markdown, no code fences, no extra text.
+
+The application displays only finaltranslation. You may put notes, checks, or reasoning in other fields, but never put them in finaltranslation.
+
+Input:
+{"targetLanguage":"<lang>","segments":[{"id":1,"text":"..."}],"glossary":{"sourceTerm":"targetTerm"},"tone":"<formal|casual>"}
+
+Output:
+{"translations":[{"id":1,"finaltranslation":"...","sourceLanguage":"<detected>","reasoning":""}]}
+
+Rules:
+1. Keep id, order, and count of segments.
+2. finaltranslation must contain only the final polished translation.
+3. Preserve whitespace, HTML entities, and HTML-like tags. Translate inner text only.
+4. Follow glossary first. If a glossary value is empty, keep the source term unchanged.
+5. Do not translate code, placeholders, or text inside backticks.
+6. Use reasoning only for non-visible notes if needed; otherwise set it to "".
+7. On error, return {"translations":[]}.`;
+
 export const defaultSystemPromptXml = `Act as a translation API. Output raw XML-like format only. No Markdown fences (xml). No conversational filler.
 
 Input:
@@ -686,6 +719,7 @@ const defaultApi = {
   rootMargin: 500, // 滚动加载提前触发距离
   useContext: false, // 是否启用智能上下文
   contextSize: DEFAULT_CONTEXT_SIZE, // 智能上下文保留会话数
+  useJsonResponseFormat: false,
   temperature: 0.0,
   maxTokens: 20480,
   thinkingMode: "auto", // 思考模式：auto | enabled | disabled
diff --git a/src/config/i18n.js b/src/config/i18n.js
index 7dea291b..d1ea0cc7 100644
--- a/src/config/i18n.js
+++ b/src/config/i18n.js
@@ -370,6 +370,20 @@ export const I18N = {
     ja: `各APIの思考パラメータは統一されていません。エラーが発生した場合は「APIデフォルト」を使用してください。`,
     ko: `API별 사고 매개변수가 통일되어 있지 않습니다. 오류 발생 시 "API 기본값"을 사용하세요.`,
   },
+  use_json_response_format: {
+    zh: `JSON Response Format`,
+    en: `JSON Response Format`,
+    zh_TW: `JSON Response Format`,
+    ja: `JSON Response Format`,
+    ko: `JSON Response Format`,
+  },
+  use_json_response_format_helper: {
+    zh: `Inject OpenAI-compatible json_schema response_format.`,
+    en: `Inject OpenAI-compatible json_schema response_format.`,
+    zh_TW: `Inject OpenAI-compatible json_schema response_format.`,
+    ja: `Inject OpenAI-compatible json_schema response_format.`,
+    ko: `Inject OpenAI-compatible json_schema response_format.`,
+  },
   thinking_effort: {
     zh: `思考强度`,
     en: `Thinking Effort`,
@@ -2367,6 +2381,13 @@ export const I18N = {
     ja: `クリックして「JSON 形式」に切り替え`,
     ko: `클릭하여 "JSON 형식"으로 전환`,
   },
+  json_finaltranslation_output: {
+    zh: `JSON finaltranslation`,
+    en: `JSON finaltranslation`,
+    zh_TW: `JSON finaltranslation`,
+    ja: `JSON finaltranslation`,
+    ko: `JSON finaltranslation`,
+  },
   xml_output: {
     zh: `点击切换 “XML 格式“`,
     en: `Click to switch to "XML Format"`,
diff --git a/src/libs/stream.js b/src/libs/stream.js
index d585a2ea..c0e6bc27 100644
--- a/src/libs/stream.js
+++ b/src/libs/stream.js
@@ -186,10 +186,13 @@ export function createStreamingJsonParser() {
       value &&
       typeof value === "object" &&
       typeof value.id === "number" &&
-      (typeof value.text === "string" || typeof value.translation === "string")
+      (typeof value.finaltranslation === "string" ||
+        typeof value.text === "string" ||
+        typeof value.translation === "string")
     ) {
       const id = value.id;
-      const translation = value.text || value.translation || "";
+      const translation =
+        value.finaltranslation ?? value.text ?? value.translation ?? "";
       const sourceLanguage = value.sourceLanguage || value.src || "";
       pending.push({ id, translation: [translation, sourceLanguage] });
     }
@@ -284,8 +287,7 @@ export function createRealtimeStreamParser() {
       /<(t|item|seg)\s+id="\d+"(?:\s[^>]*)?>[\s\S]*?<\/\1>/gi,
       ""
     );
-    const openRegex =
-      /<(t|item|seg)\s+id="(\d+)"(?:\s[^>]*)?>([^]*)$/;
+    const openRegex = /<(t|item|seg)\s+id="(\d+)"(?:\s[^>]*)?>([^]*)$/;
     const openMatch = remaining.match(openRegex);
     if (openMatch) {
       const id = parseInt(openMatch[2], 10);
diff --git a/src/views/Options/Apis.js b/src/views/Options/Apis.js
index 83ee215d..e997b20a 100644
--- a/src/views/Options/Apis.js
+++ b/src/views/Options/Apis.js
@@ -47,6 +47,7 @@ import {
   defaultNobatchPrompt,
   defaultNobatchUserPrompt,
   defaultSystemPrompt,
+  defaultSystemPromptJsonFinalTranslation,
   defaultSystemPromptXml,
   defaultSystemPromptLines,
   THINKING_PARAM_MAP,
@@ -163,6 +164,7 @@ function ApiFields({ apiSlug, isUserApi, deleteApi, copyApi, onCollapse }) {
   const handleUpdateSystemPrompt = (e) => {
     const promptMap = {
       json: defaultSystemPrompt,
+      json_finaltranslation: defaultSystemPromptJsonFinalTranslation,
       xml: defaultSystemPromptXml,
       textlines: defaultSystemPromptLines,
     };
@@ -226,6 +228,7 @@ function ApiFields({ apiSlug, isUserApi, deleteApi, copyApi, onCollapse }) {
     useBatchFetch = false,
     useStream = false,
     streamRenderMode = "disabled",
+    useJsonResponseFormat = false,
     transAllnow = false,
     rootMargin = 500,
     batchInterval = DEFAULT_BATCH_INTERVAL,
@@ -245,6 +248,7 @@ function ApiFields({ apiSlug, isUserApi, deleteApi, copyApi, onCollapse }) {
   } = formData;
 
   const thinkingParam = THINKING_PARAM_MAP[apiType];
+  const isOpenAICompatible = API_SPE_TYPES.openaiCompatible.has(apiType);
 
   const keyHelper = useMemo(
     () => (API_SPE_TYPES.mulkeys.has(apiType) ? i18n("mulkeys_help") : ""),
@@ -625,6 +629,27 @@ function ApiFields({ apiSlug, isUserApi, deleteApi, copyApi, onCollapse }) {
               </Grid>
             </>
           )}
+
+          {isOpenAICompatible && (
+            <Grid item xs={12} sm={12} md={6} lg={3}>
+              <TextField
+                select
+                fullWidth
+                size="small"
+                name="useJsonResponseFormat"
+                value={useJsonResponseFormat}
+                label={i18n("use_json_response_format", "JSON Response Format")}
+                onChange={handleChange}
+                helperText={i18n(
+                  "use_json_response_format_helper",
+                  "Injects OpenAI-compatible json_schema response_format."
+                )}
+              >
+                <MenuItem value={false}>{i18n("disable")}</MenuItem>
+                <MenuItem value={true}>{i18n("enable")}</MenuItem>
+              </TextField>
+            </Grid>
+          )}
         </Grid>
       </Box>
 
@@ -807,6 +832,17 @@ function ApiFields({ apiSlug, isUserApi, deleteApi, copyApi, onCollapse }) {
                       >
                         {i18n("json_output")}
                       </Link>
+                      <Link
+                        component="button"
+                        sx={{ margin: "0 1em" }}
+                        data-output="json_finaltranslation"
+                        onClick={handleUpdateSystemPrompt}
+                      >
+                        {i18n(
+                          "json_finaltranslation_output",
+                          "JSON finaltranslation"
+                        )}
+                      </Link>
                       <Link
                         component="button"
                         sx={{ margin: "0 1em" }}