diff --git a/src/cli/index.js b/src/cli/index.js
index 7d4a8a1..7e4c22f 100644
--- a/src/cli/index.js
+++ b/src/cli/index.js
@@ -9,6 +9,7 @@ const readline = require('readline');
 const { ensureConfig } = require('../config');
 const { createState } = require('../core/state');
 const { buildSystemPrompt } = require('../core/context');
+const { getModelByKey } = require('../config');
 const { streamChat } = require('../model/client');
 const { executeTool } = require('../tools/dispatcher');
 const { openCommandMenu, hasCommandMatch } = require('../ui/command_menu');
@@ -17,7 +18,7 @@ const { Spinner, truncateThinking } = require('../ui/spinner');
 const { renderBanner } = require('../ui/banner');
 const { buildStartLine, buildFinalLine, startToolDisplay, formatResultLines, printResultLines } = require('../ui/tool_display');
 const { createConversation, updateConversation } = require('../storage/conversation_store');
-const { applyUsage, normalizeTokenUsage } = require('../utils/token_usage');
+const { applyUsage, normalizeTokenUsage, normalizeUsagePayload } = require('../utils/token_usage');
 const { gray, cyan, green, red, blue } = require('../utils/colors');
 const { createIndentedWriter } = require('../ui/indented_writer');
 const { createStatusBar } = require('../ui/status_bar');
@@ -264,7 +265,10 @@ initReadline();
 
 statusBar = createStatusBar({
   getTokens: () => normalizeTokenUsage(state.tokenUsage).total || 0,
-  maxTokens: '256k',
+  getMaxTokens: () => {
+    const model = getModelByKey(config, state.modelKey);
+    return model && Number.isFinite(model.max_context) ? model.max_context : null;
+  },
 });
 statusBar.render();
 
@@ -657,13 +661,16 @@ async function runAssistantLoop() {
         abortSignal: streamController.signal,
       })) {
         const choice = chunk.choices && chunk.choices[0];
-        if (!choice) continue;
-        const usage = (choice && (choice.usage || choice.delta?.usage)) || chunk.usage;
-        if (usage) {
-          if (Number.isFinite(usage.prompt_tokens)) usagePrompt = usage.prompt_tokens;
-          if (Number.isFinite(usage.completion_tokens)) usageCompletion = usage.completion_tokens;
-          if (Number.isFinite(usage.total_tokens)) usageTotal = usage.total_tokens;
+        const usage = (chunk && chunk.usage)
+          || (choice && choice.usage)
+          || (choice && choice.delta && choice.delta.usage);
+        const normalizedUsage = normalizeUsagePayload(usage);
+        if (normalizedUsage) {
+          if (Number.isFinite(normalizedUsage.prompt_tokens)) usagePrompt = normalizedUsage.prompt_tokens;
+          if (Number.isFinite(normalizedUsage.completion_tokens)) usageCompletion = normalizedUsage.completion_tokens;
+          if (Number.isFinite(normalizedUsage.total_tokens)) usageTotal = normalizedUsage.total_tokens;
         }
+        if (!choice) continue;
         const delta = choice.delta || {};
 
         if (delta.reasoning_content || delta.reasoning_details || choice.reasoning_details) {
diff --git a/src/ui/status_bar.js b/src/ui/status_bar.js
index 009824f..cb23335 100644
--- a/src/ui/status_bar.js
+++ b/src/ui/status_bar.js
@@ -11,7 +11,7 @@ function truncateNoEllipsis(text, maxCols) {
   return out;
 }
 
-function createStatusBar({ getTokens, maxTokens }) {
+function createStatusBar({ getTokens, maxTokens, getMaxTokens }) {
   let mode = 'input';
   let enabled = true;
   let scrollApplied = false;
@@ -30,8 +30,10 @@ function createStatusBar({ getTokens, maxTokens }) {
       const k = Math.round((num / 1000) * 10) / 10;
       return `${k % 1 === 0 ? k.toFixed(0) : k.toFixed(1)}k`;
     };
-    const right = `当前上下文 ${formatCount(total)}/${maxTokens}`;
-    const rightTail = ` ${formatCount(total)}/${maxTokens}`;
+    const maxValue = typeof getMaxTokens === 'function' ? getMaxTokens() : maxTokens;
+    const maxText = typeof maxValue === 'number' ? formatCount(maxValue) : (maxValue || '?');
+    const right = `当前上下文 ${formatCount(total)}/${maxText}`;
+    const rightTail = ` ${formatCount(total)}/${maxText}`;
     const leftWidth = visibleWidth(left);
     const rightWidth = visibleWidth(right);
     const usableCols = Math.max(1, cols - 1);