diff --git a/CHANGELOG.md b/CHANGELOG.md
index fc89177dba31..9f8e41074d18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ Docs: https://docs.openclaw.ai
 ### Fixes
 
 - Codex app-server: keep system-prompt reports working when bootstrap hooks provide workspace files with only a path and content, so hook-supplied SOUL/IDENTITY/TOOLS/USER context still reports injected characters correctly. (#84736) Thanks @JARVIS-Glasses.
+- Providers/MiniMax music: stop advertising `durationSeconds` control and remove prompt-injected duration hints, so `music_generate` reports MiniMax duration as an unsupported override instead of suggesting MiniMax can enforce track length. Fixes #84508. Thanks @neeravmakwana.
 - WhatsApp: update Baileys to `7.0.0-rc12`.
 - Build: suppress per-locale `rolldown-plugin-dts:fake-js` CommonJS dts warnings emitted while bundling the intentionally-inlined `zod/v4/locales/*.d.cts` files, so `pnpm build` output stays readable after the 0.25.1 plugin bump. Thanks @romneyda.
 - CLI/nodes: route lazy plugin-registration logs to stderr for JSON-mode `openclaw nodes` commands so stdout stays parseable. (#84684) Thanks @TurboTheTurtle.
diff --git a/docs/providers/minimax.md b/docs/providers/minimax.md
index fc83268929ff..eedc62fafeb9 100644
--- a/docs/providers/minimax.md
+++ b/docs/providers/minimax.md
@@ -292,7 +292,7 @@ The bundled MiniMax plugin registers music generation through the shared
 - Default music model: `minimax/music-2.6`
 - OAuth music model: `minimax-portal/music-2.6`
 - Also supports `minimax/music-2.5` and `minimax/music-2.0`
-- Prompt controls: `lyrics`, `instrumental`, `durationSeconds`
+- Prompt controls: `lyrics`, `instrumental`
 - Output format: `mp3`
 - Session-backed runs detach through the shared task/status flow, including `action: "status"`
 
diff --git a/docs/tools/music-generation.md b/docs/tools/music-generation.md
index 66c0f69ca6ce..6dc5fa83ec9a 100644
--- a/docs/tools/music-generation.md
+++ b/docs/tools/music-generation.md
@@ -94,13 +94,13 @@ Generate an energetic chiptune loop about launching a rocket at sunrise.
 
 ## Supported providers
 
-| Provider   | Default model                | Reference inputs | Supported controls                                        | Auth                                   |
-| ---------- | ---------------------------- | ---------------- | --------------------------------------------------------- | -------------------------------------- |
-| ComfyUI    | `workflow`                   | Up to 1 image    | Workflow-defined music or audio                           | `COMFY_API_KEY`, `COMFY_CLOUD_API_KEY` |
-| fal        | `fal-ai/minimax-music/v2.6`  | None             | `lyrics`, `instrumental`, `durationSeconds`, `format`     | `FAL_KEY` or `FAL_API_KEY`             |
-| Google     | `lyria-3-clip-preview`       | Up to 10 images  | `lyrics`, `instrumental`, `format`                        | `GEMINI_API_KEY`, `GOOGLE_API_KEY`     |
-| MiniMax    | `music-2.6`                  | None             | `lyrics`, `instrumental`, `durationSeconds`, `format=mp3` | `MINIMAX_API_KEY` or MiniMax OAuth     |
-| OpenRouter | `google/lyria-3-pro-preview` | Up to 1 image    | `lyrics`, `instrumental`, `durationSeconds`, `format`     | `OPENROUTER_API_KEY`                   |
+| Provider   | Default model                | Reference inputs | Supported controls                                    | Auth                                   |
+| ---------- | ---------------------------- | ---------------- | ----------------------------------------------------- | -------------------------------------- |
+| ComfyUI    | `workflow`                   | Up to 1 image    | Workflow-defined music or audio                       | `COMFY_API_KEY`, `COMFY_CLOUD_API_KEY` |
+| fal        | `fal-ai/minimax-music/v2.6`  | None             | `lyrics`, `instrumental`, `durationSeconds`, `format` | `FAL_KEY` or `FAL_API_KEY`             |
+| Google     | `lyria-3-clip-preview`       | Up to 10 images  | `lyrics`, `instrumental`, `format`                    | `GEMINI_API_KEY`, `GOOGLE_API_KEY`     |
+| MiniMax    | `music-2.6`                  | None             | `lyrics`, `instrumental`, `format=mp3`                | `MINIMAX_API_KEY` or MiniMax OAuth     |
+| OpenRouter | `google/lyria-3-pro-preview` | Up to 1 image    | `lyrics`, `instrumental`, `durationSeconds`, `format` | `OPENROUTER_API_KEY`                   |
 
 ### Capability matrix
 
@@ -274,8 +274,8 @@ explicit `model`, `primary`, and `fallbacks` entries.
   </Accordion>
   <Accordion title="MiniMax">
     Uses the batch `music_generation` endpoint. Supports prompt, optional
-    lyrics, instrumental mode, duration steering, and mp3 output through
-    either `minimax` API-key auth or `minimax-portal` OAuth.
+    lyrics, instrumental mode, and mp3 output through either `minimax`
+    API-key auth or `minimax-portal` OAuth.
   </Accordion>
   <Accordion title="OpenRouter">
     Uses OpenRouter chat completions audio output with streaming enabled. The
diff --git a/extensions/minimax/music-generation-provider.test.ts b/extensions/minimax/music-generation-provider.test.ts
index 314da6f75043..9969dd364008 100644
--- a/extensions/minimax/music-generation-provider.test.ts
+++ b/extensions/minimax/music-generation-provider.test.ts
@@ -75,6 +75,9 @@ describe("minimax music generation provider", () => {
     expect(request.url).toBe("https://api.minimax.io/v1/music_generation");
     const body = request.body as Record<string, unknown>;
     expect(body.model).toBe("music-2.6");
+    expect(body.prompt).toBe("upbeat dance-pop with female vocals");
+    expect(body.prompt).not.toContain("Target duration");
+    expect(body).not.toHaveProperty("duration");
     expect(body.lyrics).toBe("our city wakes");
     expect(body.output_format).toBe("url");
     expect(body.audio_setting).toEqual({
@@ -89,6 +92,7 @@ describe("minimax music generation provider", () => {
     expect(result.lyrics).toEqual(["our city wakes"]);
     expect(result.metadata?.taskId).toBe("task-123");
     expect(result.metadata?.audioUrl).toBe("https://example.com/out.mp3");
+    expect(result.metadata).not.toHaveProperty("requestedDurationSeconds");
   });
 
   it("downloads tracks when url output is returned in data.audio", async () => {
diff --git a/extensions/minimax/music-generation-provider.ts b/extensions/minimax/music-generation-provider.ts
index bcafb8b186a2..90ee4c69b62f 100644
--- a/extensions/minimax/music-generation-provider.ts
+++ b/extensions/minimax/music-generation-provider.ts
@@ -2,7 +2,6 @@ import { extensionForMime } from "openclaw/plugin-sdk/media-mime";
 import type {
   GeneratedMusicAsset,
   MusicGenerationProvider,
-  MusicGenerationRequest,
 } from "openclaw/plugin-sdk/music-generation";
 import { isProviderApiKeyConfigured } from "openclaw/plugin-sdk/provider-auth";
 import { resolveApiKeyForProvider } from "openclaw/plugin-sdk/provider-auth-runtime";
@@ -106,14 +105,6 @@ async function downloadTrackFromUrl(params: {
   };
 }
 
-function buildPrompt(req: MusicGenerationRequest): string {
-  const parts = [req.prompt.trim()];
-  if (typeof req.durationSeconds === "number" && Number.isFinite(req.durationSeconds)) {
-    parts.push(`Target duration: about ${Math.max(1, Math.round(req.durationSeconds))} seconds.`);
-  }
-  return parts.join("\n\n");
-}
-
 function resolveMinimaxMusicModel(model: string | undefined): string {
   const trimmed = normalizeOptionalString(model);
   if (!trimmed) {
@@ -138,7 +129,6 @@ function buildMinimaxMusicProvider(providerId: string): MusicGenerationProvider
         maxTracks: 1,
         supportsLyrics: true,
         supportsInstrumental: true,
-        supportsDuration: true,
         supportsFormat: true,
         supportedFormats: ["mp3"],
       },
@@ -187,7 +177,7 @@ function buildMinimaxMusicProvider(providerId: string): MusicGenerationProvider
       const lyrics = normalizeOptionalString(req.lyrics);
       const body = {
         model,
-        prompt: buildPrompt(req),
+        prompt: req.prompt.trim(),
         ...(req.instrumental === true ? { is_instrumental: true } : {}),
         ...(lyrics ? { lyrics } : req.instrumental === true ? {} : { lyrics_optimizer: true }),
         output_format: "url",
@@ -251,9 +241,6 @@ function buildMinimaxMusicProvider(providerId: string): MusicGenerationProvider
             ...(audioUrl ? { audioUrl } : {}),
             instrumental: req.instrumental === true,
             ...(lyrics ? { requestedLyrics: true } : {}),
-            ...(typeof req.durationSeconds === "number"
-              ? { requestedDurationSeconds: req.durationSeconds }
-              : {}),
           },
         };
       } finally {