diff --git a/README.md b/README.md
index 0f9ca5c6..da568664 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ derives the npm package version from that tag. See [the release guide](docs/rele
 
 ### `mmx text`
 
-`text chat` and `text repl` default to `MiniMax-M3.1-Flash`. An explicit `--model` or saved `default-text-model` takes precedence. This model currently requires M Plan or MiniMax Code; with a pay-as-you-go key, select `MiniMax-M3` explicitly. See the [model guide](https://platform.minimax.io/docs/guides/text-generation#agent).
+`text chat` and `text repl` default to `MiniMax-M3.1-Flash`. An explicit `--model` or saved `default-text-model` takes precedence. It is available with Token Plan, MiniMax Code, and pay-as-you-go keys. See the [model guide](https://platform.minimax.io/docs/guides/text-generation#agent).
 
 ```bash
 mmx text chat --message "Write a poem"
@@ -214,7 +214,7 @@ mmx agent setup --agent oh-my-pi --api-key "$MINIMAX_API_KEY" --region global
 # --agent omp is an alias for --agent oh-my-pi
 ```
 
-`agent setup` defaults to `MiniMax-M3.1-Flash` for subscription keys and to `MiniMax-M3` for pay-as-you-go keys (`sk-api-...`). In non-interactive mode, `--model` overrides this selection.
+`agent setup` defaults to `MiniMax-M3.1-Flash` for both Token Plan and pay-as-you-go keys (`sk-api-...`). In non-interactive mode, `--model` overrides this selection.
 
 The command verifies the key and selected region before writing. Existing files are backed up when changed; use `--dry-run` to preview without a live request. In the interactive wizard, compatible agents that are missing from `PATH` can be installed from a second multi-select list using their official packages or installer scripts. The Hermes install uses its official core CLI stages and skips optional system packages, Node workspace, browser, computer-use, setup, and gateway stages. After installation, mmx applies the MiniMax configuration while preserving installer settings. Agents that fail a platform or prerequisite check are explained and left configuration-only. Non-interactive invocations remain configuration-only, and the command never launches an agent.
 
diff --git a/README_CN.md b/README_CN.md
index 913abc8f..73da5a98 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -65,7 +65,7 @@ mmx quota
 
 ### `mmx text`
 
-`text chat` 和 `text repl` 默认使用 `MiniMax-M3.1-Flash`；显式指定的 `--model` 或已保存的 `default-text-model` 优先。该模型目前仅通过 M Plan 和 MiniMax Code 提供；使用按量付费 Key 时，请显式选择 `MiniMax-M3`。详见[模型调用文档](https://platform.minimax.cn/docs/guides/text-generation#agent)。
+`text chat` 和 `text repl` 默认使用 `MiniMax-M3.1-Flash`；显式指定的 `--model` 或已保存的 `default-text-model` 优先。Token Plan、MiniMax Code 和按量付费 Key 均可使用该模型。详见[模型调用文档](https://platform.minimax.cn/docs/guides/text-generation#agent)。
 
 ```bash
 mmx text chat --message "写一首诗"
@@ -188,7 +188,7 @@ mmx agent setup --agent oh-my-pi --api-key "$MINIMAX_API_KEY" --region cn
 # --agent omp 是 --agent oh-my-pi 的别名
 ```
 
-`agent setup` 对订阅 Key 默认使用 `MiniMax-M3.1-Flash`，对按量付费 Key（`sk-api-...`）默认使用 `MiniMax-M3`。非交互模式下可用 `--model` 覆盖该选择。
+`agent setup` 对订阅 Key 和按量付费 Key（`sk-api-...`）都默认使用 `MiniMax-M3.1-Flash`。非交互模式下可用 `--model` 覆盖该选择。
 
 写入前会验证 Key 和所选区域；修改已有文件时会创建备份。可用 `--dry-run` 预览且不会发起联网请求。在交互式向导中，兼容且未在 `PATH` 中检测到的 Agent 会出现在第二个安装多选列表，并通过官方软件包或安装脚本安装。Hermes 仅执行官方核心 CLI 安装阶段，跳过可选系统软件包、Node 工作区、浏览器、计算机控制、初始化和网关阶段。安装完成后，mmx 会保留安装器生成的其他设置并写入 MiniMax 配置。平台或依赖检查不通过的 Agent 会说明原因并保持仅配置。非交互调用仍只写配置，且该命令不会启动 Agent。
 
diff --git a/SDK.md b/SDK.md
index 2dc8f6c6..c463d289 100644
--- a/SDK.md
+++ b/SDK.md
@@ -25,7 +25,7 @@ You can also omit `apiKey` if it's already configured via `mmx config set api-ke
 
 ### Text
 
-When `model` is omitted, the SDK uses `MiniMax-M3.1-Flash`. This model currently requires M Plan or MiniMax Code; with a pay-as-you-go key, pass `model: 'MiniMax-M3'` explicitly. Thinking is enabled by default with `max` effort; no extra request fields are required. See the [model guide](https://platform.minimax.io/docs/guides/text-generation#agent).
+When `model` is omitted, the SDK uses `MiniMax-M3.1-Flash`. It is available with Token Plan, MiniMax Code, and pay-as-you-go keys. Thinking is enabled by default with `max` effort; no extra request fields are required. See the [model guide](https://platform.minimax.io/docs/guides/text-generation#agent).
 
 ```typescript
 const response = await sdk.text.chat({
diff --git a/src/commands/agent/setup.ts b/src/commands/agent/setup.ts
index 21d5f271..691c2c4b 100644
--- a/src/commands/agent/setup.ts
+++ b/src/commands/agent/setup.ts
@@ -137,10 +137,6 @@ function detectApiKeyKind(apiKey: string): ApiKeyKind | undefined {
   return undefined;
 }
 
-function defaultModelForApiKey(apiKey: string): typeof DEFAULT_MINIMAX_MODEL | 'MiniMax-M3' {
-  return detectApiKeyKind(apiKey) === 'paygo' ? 'MiniMax-M3' : DEFAULT_MINIMAX_MODEL;
-}
-
 function readExistingCodexApiKey(agents: AgentId[]): string | undefined {
   if (!agents.includes('codex')) return undefined;
   const home = homedir();
@@ -379,17 +375,7 @@ async function interactiveOptions(
   if (!apiKey) {
     throw new CLIError('A MiniMax API key is required.', ExitCode.USAGE);
   }
-  const model = defaultModelForApiKey(apiKey);
-  if (model === 'MiniMax-M3') {
-    await promptNote({
-      title: 'Model for pay-as-you-go key',
-      message: 'MiniMax-M3.1-Flash currently requires Token Plan or MiniMax Code. '
-        + 'This setup will use MiniMax-M3.'
-        + (agents.some(agent => agent === 'claude-code' || agent === 'codex' || agent === 'opencode' || agent === 'zed')
-          ? ' The earlier window choice applies to the M3.1 model entry, not the active M3 model.'
-          : ''),
-    });
-  }
+  const model = DEFAULT_MINIMAX_MODEL;
 
   let message = `Configure ${agents.map((agent) => AGENT_LABELS[agent]).join(', ')}? `
     + 'mmx will write configuration files.';
@@ -469,7 +455,7 @@ function nonInteractiveOptions(flags: GlobalFlags): SelectedAgentSetup {
     );
   }
 
-  const model = ((flags.model as string | undefined) ?? defaultModelForApiKey(apiKey)).trim();
+  const model = ((flags.model as string | undefined) ?? DEFAULT_MINIMAX_MODEL).trim();
   if (!model) throw new CLIError('--model must not be empty.', ExitCode.USAGE);
   const supportedModel = MINIMAX_MODELS.find(candidate => candidate.id === model)?.id;
   if (!supportedModel) {
diff --git a/test/commands/agent/setup.test.ts b/test/commands/agent/setup.test.ts
index 8b4e853a..315ce64e 100644
--- a/test/commands/agent/setup.test.ts
+++ b/test/commands/agent/setup.test.ts
@@ -364,7 +364,7 @@ describe('agent setup command', () => {
     expect(JSON.parse(output).verification.model).toBe('MiniMax-M3.1-Flash');
   });
 
-  it('uses MiniMax-M3 by default for pay-as-you-go keys', async () => {
+  it('uses MiniMax-M3.1-Flash by default for pay-as-you-go keys', async () => {
     const output = await captureConsoleLog(() => setupCommand.execute(
       testConfig(),
       testFlags({
@@ -373,7 +373,7 @@ describe('agent setup command', () => {
         region: 'cn',
       }),
     ));
-    expect(JSON.parse(output).verification.model).toBe('MiniMax-M3');
+    expect(JSON.parse(output).verification.model).toBe('MiniMax-M3.1-Flash');
   });
 
   it('keeps an explicit model choice for pay-as-you-go keys', async () => {
@@ -383,10 +383,10 @@ describe('agent setup command', () => {
         agent: ['codex'],
         apiKey: 'sk-api-test-secret',
         region: 'cn',
-        model: 'MiniMax-M3.1-Flash',
+        model: 'MiniMax-M3',
       }),
     ));
-    expect(JSON.parse(output).verification.model).toBe('MiniMax-M3.1-Flash');
+    expect(JSON.parse(output).verification.model).toBe('MiniMax-M3');
   });
 
   it('rejects a legacy model outside this setup contract', async () => {