diff --git a/src/commands/auth/login.ts b/src/commands/auth/login.ts
index e52bef8..e94c5b5 100644
--- a/src/commands/auth/login.ts
+++ b/src/commands/auth/login.ts
@@ -8,6 +8,7 @@ import { quotaEndpoint } from '../../client/endpoints';
 import { formatOutput } from '../../output/formatter';
 import { getConfigPath } from '../../config/paths';
 import { readConfigFile, writeConfigFile } from '../../config/loader';
+import { isInteractive } from '../../utils/env';
 import type { Config } from '../../config/schema';
 import type { GlobalFlags } from '../../types/flags';
 import type { CredentialFile } from '../../auth/types';
@@ -29,6 +30,26 @@ export default defineCommand({
     'minimax auth login --method api-key --api-key sk-xxxxx',
   ],
   async run(config: Config, flags: GlobalFlags) {
+    // --- Phase 4: env key detection ---
+    const envKey = process.env.MINIMAX_API_KEY;
+    if (envKey) {
+      const maskedEnvKey = envKey.length > 8 ? `${envKey.slice(0, 4)}...${envKey.slice(-4)}` : '***';
+      if (isInteractive({ nonInteractive: config.nonInteractive })) {
+        const { confirm } = await import('@clack/prompts');
+        const proceed = await confirm({
+          message: `Detected MINIMAX_API_KEY in environment (${maskedEnvKey}).\nYou are already authenticated via env.\nDo you still want to configure local persistent credentials?`,
+          initialValue: false,
+        });
+        if (!proceed) {
+          process.stdout.write('Login skipped. Using environment variables.\n');
+          process.exit(0);
+        }
+      } else {
+        process.stderr.write(`Warning: MINIMAX_API_KEY is already set in environment.\n`);
+      }
+    }
+    // --- Phase 4 end ---
+
     const method = flags.apiKey ? 'api-key' : (flags.method as string) || 'oauth';
 
     if (method === 'api-key') {
diff --git a/src/commands/auth/status.ts b/src/commands/auth/status.ts
index 2ae5a3f..06349db 100644
--- a/src/commands/auth/status.ts
+++ b/src/commands/auth/status.ts
@@ -2,12 +2,15 @@ import { defineCommand } from '../../command';
 import { resolveCredential } from '../../auth/resolver';
 import { loadCredentials } from '../../auth/credentials';
 import { formatOutput, detectOutputFormat } from '../../output/formatter';
+import { requestJson } from '../../client/http';
+import { quotaEndpoint } from '../../client/endpoints';
 import type { Config } from '../../config/schema';
 import type { GlobalFlags } from '../../types/flags';
+import type { QuotaResponse } from '../../types/api';
 
 export default defineCommand({
   name: 'auth status',
-  description: 'Show current authentication state',
+  description: 'Show current authentication state and quota snapshot',
   usage: 'minimax auth status',
   examples: [
     'minimax auth status',
@@ -18,26 +21,71 @@ export default defineCommand({
       const credential = await resolveCredential(config);
       const format = detectOutputFormat(config.output);
 
-      const result: Record<string, unknown> = {
-        method: credential.method,
-        source: credential.source,
-      };
+      if (format !== 'text') {
+        const result: Record<string, unknown> = {
+          method: credential.method,
+          source: credential.source,
+        };
+        if (credential.method === 'oauth') {
+          const creds = await loadCredentials();
+          if (creds) {
+            result.token_expires = creds.expires_at;
+            if (creds.account) result.account = creds.account;
+          }
+        } else {
+          result.key = credential.token.slice(0, 6) + '...' + credential.token.slice(-4);
+        }
+        console.log(formatOutput(result, format));
+        return;
+      }
+
+      // Text format — rich output
+      console.log('Authentication Status:');
+      console.log(`  Method: ${credential.method}`);
+      console.log(`  Source: ${credential.source}`);
+
+      const token = credential.token;
+      const maskedToken = token.length > 8 ? `${token.slice(0, 4)}...${token.slice(-4)}` : '***';
+      console.log(`  Key:    ${maskedToken}`);
 
       if (credential.method === 'oauth') {
         const creds = await loadCredentials();
         if (creds) {
-          result.token_expires = creds.expires_at;
-          if (creds.account) result.account = creds.account;
+          if (creds.account) console.log(`  Account: ${creds.account}`);
           const expiresAt = new Date(creds.expires_at);
           const minutesLeft = Math.round((expiresAt.getTime() - Date.now()) / 60000);
-          result.expires_in = `${minutesLeft} minutes`;
+          console.log(`  Expires in: ${minutesLeft} minutes`);
         }
-        result.credentials_path = '~/.minimax/credentials.json';
-      } else {
-        result.key = credential.token.slice(0, 6) + '...' + credential.token.slice(-4);
       }
 
-      console.log(formatOutput(result, format));
+      // Fetch quota snapshot
+      console.log('');
+      process.stderr.write('Fetching quota snapshot...\n');
+      try {
+        const url = quotaEndpoint(config.baseUrl);
+        const quota = await requestJson<QuotaResponse>(config, { url, method: 'GET' });
+        const models = quota.model_remains || [];
+        if (models.length > 0) {
+          console.log('Available Quotas:');
+          for (const m of models.slice(0, 5)) {
+            const remaining = m.current_interval_total_count - m.current_interval_usage_count;
+            const pct = m.current_interval_total_count > 0
+              ? Math.round((remaining / m.current_interval_total_count) * 100)
+              : 0;
+            console.log(`  ${m.model_name.padEnd(24)} ${String(remaining).padStart(6)} / ${m.current_interval_total_count}  (${pct}%)`);
+          }
+          if (models.length > 5) {
+            console.log(`  ... and ${models.length - 5} more (run 'minimax quota show' for full details)`);
+          }
+        } else {
+          console.log('  No quota data available.');
+        }
+      } catch (e) {
+        console.log(`  Quota fetch failed: ${(e as Error).message}`);
+      }
+      console.log('');
+      console.log("Run 'minimax quota show' for full details.");
+
     } catch {
       const format = detectOutputFormat(config.output);
       const result = {
diff --git a/src/commands/image/generate.ts b/src/commands/image/generate.ts
index 92db6d8..912d312 100644
--- a/src/commands/image/generate.ts
+++ b/src/commands/image/generate.ts
@@ -94,6 +94,10 @@ export default defineCommand({
 
     const imageUrls = response.data.image_urls || [];
 
+    if (!config.quiet) {
+      process.stderr.write('[Model: image-01]\n');
+    }
+
     // Download if --out-dir specified
     if (flags.outDir) {
       const outDir = flags.outDir as string;
diff --git a/src/commands/music/generate.ts b/src/commands/music/generate.ts
index 37587d3..3ab2edf 100644
--- a/src/commands/music/generate.ts
+++ b/src/commands/music/generate.ts
@@ -94,6 +94,10 @@ export default defineCommand({
       body,
     });
 
+    if (!config.quiet) {
+      process.stderr.write('[Model: music-2.5]\n');
+    }
+
     if (outPath && response.data.audio) {
       const audioBuffer = Buffer.from(response.data.audio, 'hex');
       writeFileSync(outPath, audioBuffer);
diff --git a/src/commands/speech/synthesize.ts b/src/commands/speech/synthesize.ts
index 7fe5a53..efcc564 100644
--- a/src/commands/speech/synthesize.ts
+++ b/src/commands/speech/synthesize.ts
@@ -117,6 +117,10 @@ export default defineCommand({
       body,
     });
 
+    if (!config.quiet) {
+      process.stderr.write(`[Model: ${model}]\n`);
+    }
+
     if (outPath && response.data.audio) {
       // --out given: decode hex and save to file
       const audioBuffer = Buffer.from(response.data.audio, 'hex');
diff --git a/src/commands/text/chat.ts b/src/commands/text/chat.ts
index c80fc06..797f4c0 100644
--- a/src/commands/text/chat.ts
+++ b/src/commands/text/chat.ts
@@ -152,6 +152,9 @@ export default defineCommand({
     const url = chatEndpoint(config.baseUrl);
 
     if (shouldStream) {
+      if (!config.quiet) {
+        process.stderr.write(`[Model: ${model}]\n`);
+      }
       const res = await request(config, {
         url,
         method: 'POST',
@@ -211,6 +214,10 @@ export default defineCommand({
 
       const text = extractText(response.content);
 
+      if (!config.quiet && format === 'text') {
+        process.stderr.write(`[Model: ${response.model || model}]\n`);
+      }
+
       if (config.quiet || format === 'text') {
         console.log(text);
       } else {
diff --git a/src/commands/video/generate.ts b/src/commands/video/generate.ts
index 2c67fbe..1bacb2a 100644
--- a/src/commands/video/generate.ts
+++ b/src/commands/video/generate.ts
@@ -85,6 +85,12 @@ export default defineCommand({
 
     const taskId = response.task_id;
 
+    if (!config.quiet && !flags.noWait && !config.async) {
+      process.stderr.write(`[Model: ${model}]\n`);
+    } else if (!config.quiet) {
+      process.stderr.write(`[Model: ${model}]\n`);
+    }
+
     // --no-wait or --async: return task ID immediately
     if (flags.noWait || config.async) {
       // Always pure JSON — Agent/CI mode needs predictable stdout