diff --git a/README.en.md b/README.en.md
index 8f5ac4775..7d269cc54 100644
--- a/README.en.md
+++ b/README.en.md
@@ -163,7 +163,7 @@ macOS builds are **not yet signed with an Apple Developer ID** and **not yet Not
 |---|---|---|---|---|
 | Kimi (Moonshot Platform / Kimi For Coding) | ✅ | ✅ | ✅ | Thinking 3-layer defense; Kimi Code plan quota shown via console session (see usage notes below) |
 | DeepSeek V4 (incl. Max thinking) | ✅ | ✅ | ✅ | Vision input stripped to avoid 400; xhigh → real max effort (#254) |
-| Xiaomi MiMo (Token Plan / Pay for Token) | ✅ | ✅ | ✅ | **Now uses native responses protocol passthrough** |
+| Xiaomi MiMo (Token Plan / Pay for Token) | ✅ | ✅ | ✅ | Image-only requests get space text-part fallback |
 | MiniMax M3 (1M) / M2.x / Text-01 | ✅ | ✅ | ✅ | `role=system` → user (v2.1.6 fix for 400); M3 context 1M; compact keeps tool-call args valid JSON (#356) |
 | OpenCode Go (`opencode.ai/zen/go/v1`, openai_chat) | ✅ | ✅ | ✅ | Low-cost open-source coding model subscription ($5 first month / $10/mo); GLM/Kimi/DeepSeek/MiMo family via /chat/completions; MiniMax/Qwen via /messages (not in this preset); 5h/weekly/monthly plan quota via console session (see usage notes below) |
 | Google AI Studio (`gemini_native`) | ✅ | ✅ | ✅ | Auto-selects Gemini 3 `/v1alpha` + Gemini 2.x `/v1beta` |
diff --git a/README.md b/README.md
index a82f4736c..c5b4d0e02 100644
--- a/README.md
+++ b/README.md
@@ -162,7 +162,7 @@ macOS 暂未做 **Apple Developer ID 代码签名** 与 **Apple 公证(Notarizat
 |---|---|---|---|---|
 | Kimi(Moonshot Platform / Kimi For Coding) | ✅ | ✅ | ✅ | thinking 三层防御;Kimi Code 套餐用量经控制台 session 显示(见下方用量说明) |
 | DeepSeek V4(含 Max 思维) | ✅ | ✅ | ✅ | 视觉输入剥离避免 400;xhigh → max 真实到达(#254) |
-| Xiaomi MiMo(Token Plan / Pay for Token) | ✅ | ✅ | ✅ | **已切原生 responses 协议直连** |
+| Xiaomi MiMo(Token Plan / Pay for Token) | ✅ | ✅ | ✅ | 纯图请求兜底空格 text part |
 | MiniMax M3(1M)/ M2.x / Text-01 | ✅ | ✅ | ✅ | `role=system` 转 user 防 400(v2.1.6);M3 上下文 1M;compact 截断工具参数保持合法 JSON(#356) |
 | OpenCode Go(`opencode.ai/zen/go/v1`,openai_chat) | ✅ | ✅ | ✅ | 低成本开源编程模型订阅($5 首月/$10 月);GLM/Kimi/DeepSeek/MiMo 系走 /chat/completions;MiniMax/Qwen 系走 /messages(不在此 preset);5h/周/月三档套餐用量经控制台 session 显示(见下方用量说明) |
 | Google AI Studio(`gemini_native`) | ✅ | ✅ | ✅ | Gemini 3 `/v1alpha` + Gemini 2.x `/v1beta` 自动选 |
diff --git a/crates/registry/src/healing.rs b/crates/registry/src/healing.rs
index c84162dcc..a1cf5e308 100644
--- a/crates/registry/src/healing.rs
+++ b/crates/registry/src/healing.rs
@@ -662,14 +662,14 @@ mod tests {
                     "name": "Xiaomi MiMo (Token Plan)",
                     "baseUrl": "https://token-plan-sgp.xiaomimimo.com/v1",
                     "isBuiltin": false,
-                    "apiFormat": "openai_chat"   // 错误值,需被覆盖回 preset 的 responses
+                    "apiFormat": "responses"   // 错误值,需被覆盖回 preset 的 openai_chat
                 }
             ]
         });
         let changed = heal_builtin_provider_fields(&mut cfg);
         assert!(changed);
         let p = &cfg["providers"][0];
-        assert_eq!(p["apiFormat"], "responses");
+        assert_eq!(p["apiFormat"], "openai_chat");
         assert_eq!(p["isBuiltin"], json!(true));
         assert_eq!(
             p["baseUrl"], "https://token-plan-sgp.xiaomimimo.com/v1",
@@ -679,15 +679,15 @@ mod tests {
 
     #[test]
     fn forces_apiformat_override_even_if_user_edited_to_bogus_value() {
-        // 用户手改把 apiFormat 改成 "responses"
+        // 关键回归(2026-05-08 MiMo 404):用户手改把 apiFormat 改成 "responses"
         // → apply 跳过代理直连上游 → 404
         // 新策略:命中 preset 即强制覆盖,不管用户改成了什么。
         let mut cfg = json!({
             "providers": [
                 {
-                    "id": "deepseek",
-                    "name": "DeepSeek",
-                    "baseUrl": "https://api.deepseek.com",
+                    "id": "xiaomi-mimo-token-plan",
+                    "name": "Xiaomi MiMo (Token Plan)",
+                    "baseUrl": "https://token-plan-cn.xiaomimimo.com/v1",
                     "isBuiltin": true,
                     "apiFormat": "responses",
                     "extraHeaders": {}
@@ -698,7 +698,7 @@ mod tests {
         assert!(changed);
         assert_eq!(
             cfg["providers"][0]["apiFormat"], "openai_chat",
-            "DeepSeek apiFormat 必须被强制覆盖回 preset 的 openai_chat"
+            "MiMo apiFormat 必须被强制覆盖回 preset 的 openai_chat"
         );
     }
 
diff --git a/crates/registry/src/presets_data.json b/crates/registry/src/presets_data.json
index 6fea434e3..f24c562a5 100644
--- a/crates/registry/src/presets_data.json
+++ b/crates/registry/src/presets_data.json
@@ -99,7 +99,7 @@
     "baseUrl": "https://api.xiaomimimo.com/v1",
     "docsUrl": "https://www.mimo-v2.com/zh/docs/quick-start/first-api-call",
     "authScheme": "bearer",
-    "apiFormat": "responses",
+    "apiFormat": "openai_chat",
     "models": {
       "default": "mimo-v2.5-pro"
     },
@@ -132,7 +132,7 @@
     "baseUrl": "https://token-plan-cn.xiaomimimo.com/v1",
     "docsUrl": "https://www.mimo-v2.com/zh/docs/quick-start/first-api-call",
     "authScheme": "bearer",
-    "apiFormat": "responses",
+    "apiFormat": "openai_chat",
     "baseUrlOptions": [
       {
         "label": "中国集群",
diff --git a/tests/replay/fixtures/registry/builtin_presets.json b/tests/replay/fixtures/registry/builtin_presets.json
index 9846e2d5e..05fe89a36 100644
--- a/tests/replay/fixtures/registry/builtin_presets.json
+++ b/tests/replay/fixtures/registry/builtin_presets.json
@@ -99,7 +99,7 @@
     "baseUrl": "https://api.xiaomimimo.com/v1",
     "docsUrl": "https://www.mimo-v2.com/zh/docs/quick-start/first-api-call",
     "authScheme": "bearer",
-    "apiFormat": "responses",
+    "apiFormat": "openai_chat",
     "models": {
       "default": "mimo-v2.5-pro"
     },
@@ -132,7 +132,7 @@
     "baseUrl": "https://token-plan-cn.xiaomimimo.com/v1",
     "docsUrl": "https://www.mimo-v2.com/zh/docs/quick-start/first-api-call",
     "authScheme": "bearer",
-    "apiFormat": "responses",
+    "apiFormat": "openai_chat",
     "baseUrlOptions": [
       {
         "label": "中国集群",