diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd23038..e2ddaac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 # Hermes Web UI -- Changelog
 
-## [v0.50.85] — 2026-04-18
+## [v0.50.86] — 2026-04-18
+
+### Added
+- **Searchable model picker** — the model dropdown now has a live search input at the top. Type any part of a model name or ID to filter the list instantly; provider group headers (Anthropic, OpenAI, OpenRouter, etc.) remain visible in filtered results. Includes a clear button, Escape-to-close support, and a "No models found" empty state. i18n strings added for English, Spanish, and zh-CN. (PR #659 by @mmartial)
+
+
 
 ### Fixed
 - **`_provider_oauth_authenticated()` now respects the `hermes_home` parameter** — the function had a CLI fast path (`hermes_cli.auth.get_auth_status()`) that ignored the caller-supplied `hermes_home` and read from the real system home. On machines where `openai-codex` (or another OAuth provider) was genuinely authenticated, this caused three test assertions to return `True` instead of `False`, regardless of the isolated `tmp_path` the test passed in. Removed the CLI fast path; the function now reads exclusively from `hermes_home/auth.json`, which is both the correct scoped behavior and what the docstring described. No functional change for production (the auth.json path was already the complete fallback). (Fixes pre-existing test_sprint34 failures)
diff --git a/static/i18n.js b/static/i18n.js
index 1494612..f3d8ff9 100644
--- a/static/i18n.js
+++ b/static/i18n.js
@@ -58,8 +58,9 @@ const LOCALES = {
     provider_mismatch_label: 'Provider mismatch',
     model_custom_label: 'Custom model ID',
     model_custom_placeholder: 'e.g. openai/gpt-5.4',
+    model_search_placeholder: 'Search models…',
+    model_search_no_results: 'No models found',
     // commands.js
-    cmd_help: 'List available commands',
     cmd_clear: 'Clear conversation messages',
     cmd_compress: 'Manually compress conversation context (usage: /compress [focus topic])',
     cmd_compact_alias: 'Legacy alias for /compress',
@@ -481,6 +482,8 @@ const LOCALES = {
     provider_mismatch_label: 'Proveedor incompatible',
     model_custom_label: 'ID de modelo personalizado',
     model_custom_placeholder: 'p. ej. openai/gpt-5.4',
+    model_search_placeholder: 'Buscar modelos…',
+    model_search_no_results: 'No se encontraron modelos',
     // commands.js
     cmd_help: 'Listar los comandos disponibles',
     cmd_clear: 'Borrar los mensajes de la conversación',
@@ -1115,6 +1118,8 @@ const LOCALES = {
     provider_mismatch_label: '\u63d0\u4f9b\u5546\u4e0d\u5339\u914d',
     model_custom_label: '\u81ea\u5b9a\u4e49\u6a21\u578b ID',
     model_custom_placeholder: '\u4f8b\u5982 openai/gpt-5.4',
+    model_search_placeholder: '\u641c\u7d22\u6a21\u578b\u2026',
+    model_search_no_results: '\u672a\u627e\u5230\u6a21\u578b',
     // commands.js
     cmd_help: '\u67e5\u770b\u53ef\u7528\u547d\u4ee4',
     cmd_clear: '\u6e05\u7a7a\u5f53\u524d\u5bf9\u8bdd\u6d88\u606f',
diff --git a/static/index.html b/static/index.html
index db9952e..b3d4a06 100644
--- a/static/index.html
+++ b/static/index.html
@@ -592,7 +592,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.85</span>
+              <span class="settings-version-badge">v0.50.86</span>
             </div>
             <div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
               <label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>
diff --git a/static/style.css b/static/style.css
index 983fdb8..ee1af51 100644
--- a/static/style.css
+++ b/static/style.css
@@ -775,6 +775,11 @@
 .model-custom-sep{padding-top:4px;border-top:1px solid var(--border);margin-top:4px;}
 .model-custom-row{display:flex;align-items:center;gap:6px;padding:6px 10px 8px;}
 .model-custom-input{flex:1;background:var(--code-bg);border:1px solid var(--border2);border-radius:6px;color:var(--text);padding:5px 8px;font-size:12px;outline:none;font-family:inherit;min-width:0;}
+.model-search-row{display:flex;align-items:center;gap:6px;padding:8px 10px 10px;}
+.model-search-input{flex:1;background:var(--code-bg);border:1px solid var(--border2);border-radius:6px;color:var(--text);padding:6px 8px;font-size:12px;outline:none;font-family:inherit;min-width:0;}
+.model-search-input:focus{border-color:var(--accent);}
+.model-search-clear{flex-shrink:0;width:22px;height:22px;border:1px solid var(--border2);border-radius:50%;background:transparent;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:color .12s,border-color .12s;font-size:10px;}
+.model-search-clear:hover{color:var(--text);border-color:var(--border);}
 .model-custom-input:focus{border-color:var(--accent);}
 .model-custom-btn{flex-shrink:0;width:24px;height:24px;border:1px solid var(--border2);border-radius:6px;background:transparent;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:color .12s,border-color .12s;}
 .model-custom-btn:hover{color:var(--accent-text);border-color:var(--accent-bg);}
diff --git a/static/ui.js b/static/ui.js
index 39204ca..f913eee 100644
--- a/static/ui.js
+++ b/static/ui.js
@@ -222,45 +222,99 @@ function renderModelDropdown(){
   const dd=$('composerModelDropdown');
   const sel=$('modelSelect');
   if(!dd||!sel) return;
-  dd.innerHTML='';
+  // Store model data for filtering
+  const _modelData=[];
   for(const child of Array.from(sel.children)){
     if(child.tagName==='OPTGROUP'){
-      const heading=document.createElement('div');
-      heading.className='model-group';
-      heading.textContent=child.label||'Models';
-      dd.appendChild(heading);
       for(const opt of Array.from(child.children)){
-        const row=document.createElement('div');
-        row.className='model-opt'+(opt.value===sel.value?' active':'');
-        row.innerHTML=`<span class="model-opt-name">${esc(opt.textContent||getModelLabel(opt.value))}</span><span class="model-opt-id">${esc(opt.value)}</span>`;
-        row.onclick=()=>selectModelFromDropdown(opt.value);
-        dd.appendChild(row);
+        _modelData.push({value:opt.value,name:esc(opt.textContent||getModelLabel(opt.value)),id:esc(opt.value),group:child.label||''});
       }
-      continue;
     }
     if(child.tagName==='OPTION'){
-      const row=document.createElement('div');
-      row.className='model-opt'+(child.value===sel.value?' active':'');
-      row.innerHTML=`<span class="model-opt-name">${esc(child.textContent||getModelLabel(child.value))}</span><span class="model-opt-id">${esc(child.value)}</span>`;
-      row.onclick=()=>selectModelFromDropdown(child.value);
-      dd.appendChild(row);
+      _modelData.push({value:child.value,name:esc(child.textContent||getModelLabel(child.value)),id:esc(child.value),group:''});
     }
   }
-  // Custom model ID input — lets users type any model not in the curated list
+  // Create search input FIRST before filterModels definition
+  const _searchRow=document.createElement('div');
+  _searchRow.className='model-search-row';
+  _searchRow.innerHTML=`<input class="model-search-input" type="text" placeholder="${esc(t('model_search_placeholder')||'Search models…')}" spellcheck="false" autocomplete="off"><button class="model-search-clear" title="Clear search">${li('x',10)}</button>`;
+  const _si=_searchRow.querySelector('.model-search-input');
+  const _sc=_searchRow.querySelector('.model-search-clear');
+  // Create custom model section elements
   const _custSep=document.createElement('div');
   _custSep.className='model-group model-custom-sep';
   _custSep.textContent=t('model_custom_label')||'Custom model ID';
-  dd.appendChild(_custSep);
   const _custRow=document.createElement('div');
   _custRow.className='model-custom-row';
   _custRow.innerHTML=`<input class="model-custom-input" type="text" placeholder="${esc(t('model_custom_placeholder')||'e.g. openai/gpt-5.4')}" spellcheck="false" autocomplete="off"><button class="model-custom-btn" title="Use this model">${li('plus',12)}</button>`;
   const _ci=_custRow.querySelector('.model-custom-input');
   const _cb=_custRow.querySelector('.model-custom-btn');
+  // Filter function (defined AFTER _searchRow and _cust* are created)
+  const _filterModels=(term)=>{
+    term=term.trim().toLowerCase();
+    const found=new Set();
+    for(const m of _modelData){
+      const name=m.name.toLowerCase();
+      const id=m.id.toLowerCase();
+      if(name.includes(term)||id.includes(term)){
+        found.add(m.value);
+      }
+    }
+    // Clear and rebuild
+    dd.innerHTML='';
+    // Add search and custom elements first (CRITICAL: must be before models)
+    dd.appendChild(_searchRow);
+    dd.appendChild(_custSep);
+    dd.appendChild(_custRow);
+    // Add models matching filter
+    let _lastGroup=null;
+    for(const m of _modelData){
+      if(!term||found.has(m.value)){
+        if(m.group&&m.group!==_lastGroup){
+          const heading=document.createElement('div');
+          heading.className='model-group';
+          heading.textContent=m.group;
+          dd.appendChild(heading);
+          _lastGroup=m.group;
+        }
+        const row=document.createElement('div');
+        row.className='model-opt'+(m.value===sel.value?' active':'');
+        row.innerHTML=`<span class="model-opt-name">${m.name}</span><span class="model-opt-id">${m.id}</span>`;
+        row.onclick=()=>selectModelFromDropdown(m.value);
+        dd.appendChild(row);
+      }
+    }
+    // Show "No results" if filtered and nothing matched
+    if(term&&found.size===0){
+      const noResult=document.createElement('div');
+      noResult.className='model-search-no-results';
+      noResult.textContent=t('model_search_no_results')||'No models found';
+      noResult.style.padding='12px 14px';
+      noResult.style.color='var(--muted)';
+      noResult.style.textAlign='center';
+      dd.appendChild(noResult);
+    }
+    // Restore focus to search input
+    _si.focus();
+  };
+  // Event handlers for search input
+  _si.addEventListener('input',()=>_filterModels(_si.value));
+  _si.addEventListener('keydown',e=>{if(e.key==='Enter') {e.preventDefault();}if(e.key==='Escape') {closeModelDropdown();}});
+  _si.addEventListener('click',e=>e.stopPropagation());
+  // Event handlers for clear button
+  _sc.onclick=()=>{ _si.value=''; _filterModels(''); _si.focus(); };
+  _sc.addEventListener('keydown',e=>{if(e.key==='Enter'||e.key===' '){ _si.value=''; _filterModels(''); _si.focus(); e.preventDefault(); }});
+  // Event handlers for custom input
   const _applyCustom=()=>{const v=_ci.value.trim();if(!v)return;selectModelFromDropdown(v);_ci.value='';};
   _cb.onclick=_applyCustom;
   _ci.addEventListener('keydown',e=>{if(e.key==='Enter'){e.preventDefault();_applyCustom();}if(e.key==='Escape'){closeModelDropdown();}});
   _ci.addEventListener('click',e=>e.stopPropagation());
+  // Add search and custom elements to dropdown (initial render)
+  dd.appendChild(_searchRow);
+  dd.appendChild(_custSep);
   dd.appendChild(_custRow);
+  // Apply initial filter (empty shows all)
+  _filterModels('');
 }
 
 async function selectModelFromDropdown(value){