diff --git a/src/web/public/index.html b/src/web/public/index.html
index 78eff9d3..95cf7149 100644
--- a/src/web/public/index.html
+++ b/src/web/public/index.html
@@ -2028,6 +2028,8 @@
                   <div class="set-modelgrid" id="appSettingsModelCards" role="radiogroup" aria-label="Model for new Claude sessions" data-search="model opus sonnet haiku fable claude"></div>
                   <select id="appSettingsClaudeModel" class="set-select set-field-hidden" aria-hidden="true" tabindex="-1">
                     <option value="" data-meta="Whatever the CLI picks">Default (CLI setting)</option>
+                    <option value="claude-fable-5-1" data-meta="Latest" data-base="claude-fable-5-1" data-ctx="1">Fable 5.1</option>
+                    <option value="claude-fable-5-1[1m]" data-variant="1m" data-base="claude-fable-5-1">Fable 5.1 (1M context)</option>
                     <option value="claude-fable-5" data-meta="Most powerful" data-base="claude-fable-5" data-ctx="1">Fable 5</option>
                     <option value="claude-fable-5[1m]" data-variant="1m" data-base="claude-fable-5">Fable 5 (1M context)</option>
                     <option value="opus" data-meta="Most capable" data-base="opus" data-ctx="1">Opus</option>
@@ -2040,7 +2042,7 @@
                   <div class="set-row" id="appSettingsContextRow" data-search="1m context window opus long">
                     <div class="set-row-text">
                       <span class="set-row-label">1M context window</span>
-                      <span class="set-row-desc" id="appSettingsContextDesc">Available for Fable 5, Opus and Opus 4.6.</span>
+                      <span class="set-row-desc" id="appSettingsContextDesc">Available for Fable 5.1, Fable 5, Opus and Opus 4.6.</span>
                     </div>
                     <label class="switch switch-sm"><input type="checkbox" id="appSettingsOpusContext1m"><span class="slider"></span></label>
                   </div>
@@ -2080,6 +2082,7 @@
                     </div>
                     <select id="appSettingsDefaultModel" class="set-select">
                       <option value="">Default (CLI default)</option>
+                      <option value="claude-fable-5-1">Fable 5.1 (Latest)</option>
                       <option value="claude-fable-5">Fable 5 (Most powerful)</option>
                       <option value="opus">Opus (Most capable)</option>
                       <option value="sonnet">Sonnet (Balanced)</option>
@@ -2094,6 +2097,7 @@
                         <option value="haiku">Haiku</option>
                         <option value="sonnet">Sonnet</option>
                         <option value="opus">Opus</option>
+                        <option value="claude-fable-5-1">Fable 5.1</option>
                         <option value="claude-fable-5">Fable 5</option>
                       </select>
                     </div>
@@ -2104,6 +2108,7 @@
                         <option value="haiku">Haiku</option>
                         <option value="sonnet">Sonnet</option>
                         <option value="opus">Opus</option>
+                        <option value="claude-fable-5-1">Fable 5.1</option>
                         <option value="claude-fable-5">Fable 5</option>
                       </select>
                     </div>
@@ -2114,6 +2119,7 @@
                         <option value="haiku">Haiku</option>
                         <option value="sonnet">Sonnet</option>
                         <option value="opus">Opus</option>
+                        <option value="claude-fable-5-1">Fable 5.1</option>
                         <option value="claude-fable-5">Fable 5</option>
                       </select>
                     </div>
@@ -2124,6 +2130,7 @@
                         <option value="haiku">Haiku</option>
                         <option value="sonnet">Sonnet</option>
                         <option value="opus">Opus</option>
+                        <option value="claude-fable-5-1">Fable 5.1</option>
                         <option value="claude-fable-5">Fable 5</option>
                       </select>
                     </div>
diff --git a/src/web/public/settings-ui.js b/src/web/public/settings-ui.js
index 67be48d8..16838851 100644
--- a/src/web/public/settings-ui.js
+++ b/src/web/public/settings-ui.js
@@ -922,7 +922,7 @@ Object.assign(CodemanApp.prototype, {
       desc.textContent = inert
         ? 'The selected model has no 1M variant.'
         : base
-          ? 'Available for Fable 5, Opus and Opus 4.6.'
+          ? 'Available for Fable 5.1, Fable 5, Opus and Opus 4.6.'
           : 'With no model pinned, this starts new sessions on Opus with a 1M window.';
     }
   },
diff --git a/test/app-settings-structure.test.ts b/test/app-settings-structure.test.ts
index 4013497e..cdbbe1aa 100644
--- a/test/app-settings-structure.test.ts
+++ b/test/app-settings-structure.test.ts
@@ -120,13 +120,31 @@ describe('App Settings modal structure', () => {
     const select = modal.match(/id="appSettingsClaudeModel"([\s\S]*?)<\/select>/)?.[1] ?? '';
     // The cards render the base models; the [1m] rows exist so that base + the
     // context switch can compose back into a real claudeModel value.
-    for (const value of ['opus[1m]', 'claude-fable-5[1m]', 'claude-opus-4-6[1m]']) {
+    for (const value of ['opus[1m]', 'claude-fable-5[1m]', 'claude-fable-5-1[1m]', 'claude-opus-4-6[1m]']) {
       expect(select).toContain(`value="${value}"`);
     }
     expect(select).toContain('data-ctx="1"');
     expect(modal).toContain('id="appSettingsOpusContext1m"');
   });
 
+  it('models: offers Fable 5.1 as a card and to task routing', () => {
+    const modal = settingsModal();
+    const select = modal.match(/id="appSettingsClaudeModel"([\s\S]*?)<\/select>/)?.[1] ?? '';
+    // The cards are built from these options, so data-ctx is what keeps the 1M
+    // switch live for the model rather than greying the row out.
+    expect(select).toMatch(/value="claude-fable-5-1"[^>]*data-ctx="1"/);
+    for (const id of [
+      'appSettingsDefaultModel',
+      'appSettingsModelExplore',
+      'appSettingsModelImplement',
+      'appSettingsModelTest',
+      'appSettingsModelReview',
+    ]) {
+      const routing = modal.match(new RegExp(`id="${id}"([\\s\\S]*?)</select>`))?.[1] ?? '';
+      expect(routing, `${id} does not offer Fable 5.1`).toContain('value="claude-fable-5-1"');
+    }
+  });
+
   it('has retired the modal-tab chrome everywhere, not just here', () => {
     // Session Options and Add Case moved onto this same `set-*` surface, so the
     // old tab classes have no users left. A reappearance means a modal drifted