diff --git a/apps/desktop/src/lib/model-search-text.ts b/apps/desktop/src/lib/model-search-text.ts
index 5cbe59d3ec..2717e7aa3f 100644
--- a/apps/desktop/src/lib/model-search-text.ts
+++ b/apps/desktop/src/lib/model-search-text.ts
@@ -9,7 +9,10 @@
  * web/src/lib/model-search-text.ts, and hermes_cli/model_search.py.
  */
 const MODEL_SEARCH_ALIASES: Record<string, readonly string[]> = {
-  k3: ['kimi-k3', 'kimi']
+  k3: ['kimi-k3', 'kimi'],
+  // OpenCode Zen serves the "Ox Alpha" stealth model under an opaque
+  // preview slug; let users find it by its public codename.
+  'x-preview-f-free': ['ox-alpha', 'ox']
 }
 
 /** Haystack for fuzzy/substring model search; never changes the wire id. */
diff --git a/hermes_cli/model_search.py b/hermes_cli/model_search.py
index 7004324604..23d3bae14b 100644
--- a/hermes_cli/model_search.py
+++ b/hermes_cli/model_search.py
@@ -13,6 +13,9 @@ from __future__ import annotations
 # Lowercased wire id → extra tokens appended to the search haystack only.
 _MODEL_SEARCH_ALIASES: dict[str, tuple[str, ...]] = {
     "k3": ("kimi-k3", "kimi"),
+    # OpenCode Zen serves the "Ox Alpha" stealth model under an opaque
+    # preview slug; let users find it by its public codename.
+    "x-preview-f-free": ("ox-alpha", "ox"),
 }
 
 # Lowercased wire id → canonical public slug it aliases. Used by picker
diff --git a/tests/hermes_cli/test_model_search.py b/tests/hermes_cli/test_model_search.py
index c6c5053584..a430608603 100644
--- a/tests/hermes_cli/test_model_search.py
+++ b/tests/hermes_cli/test_model_search.py
@@ -16,3 +16,17 @@ def test_filter_indices_surfaces_k3_for_kimi_query():
     assert "k3" in ranked
 
 
+def test_model_search_text_adds_ox_alpha_aliases():
+    assert model_search_text("x-preview-f-free") == "x-preview-f-free ox-alpha ox"
+    assert model_search_text("X-Preview-F-Free") == "X-Preview-F-Free ox-alpha ox"
+
+
+def test_filter_indices_surfaces_ox_alpha_preview_slug():
+    models = ["x-preview-f-free", "gpt-5.6-sol", "kimi-k3"]
+    haystacks = [model_search_text(m) for m in models]
+    for query in ("ox", "ox-alpha"):
+        ranked = [models[i] for i in _filter_indices(haystacks, query)]
+        assert "x-preview-f-free" in ranked, query
+
+
+
diff --git a/ui-tui/src/lib/model-search-text.test.ts b/ui-tui/src/lib/model-search-text.test.ts
index 5ef8e612c0..3440127323 100644
--- a/ui-tui/src/lib/model-search-text.test.ts
+++ b/ui-tui/src/lib/model-search-text.test.ts
@@ -13,6 +13,11 @@ describe('modelSearchText', () => {
     expect(modelSearchText('k3')).toBe('k3 kimi-k3 kimi')
     expect(modelSearchText('K3')).toBe('K3 kimi-k3 kimi')
   })
+
+  it('adds ox-alpha aliases for the Ox Alpha preview wire id', () => {
+    expect(modelSearchText('x-preview-f-free')).toBe('x-preview-f-free ox-alpha ox')
+    expect(modelSearchText('X-Preview-F-Free')).toBe('X-Preview-F-Free ox-alpha ox')
+  })
 })
 
 describe('model picker search with aliases', () => {
@@ -32,4 +37,12 @@ describe('model picker search with aliases', () => {
     const ranked = fuzzyRank(models, 'glm', modelSearchText).map(r => r.item)
     expect(ranked).toEqual([])
   })
+
+  it('surfaces the Ox Alpha preview slug when the user searches ox', () => {
+    const zenModels = ['x-preview-f-free', 'gpt-5.6-sol', 'kimi-k3']
+    const ranked = fuzzyRank(zenModels, 'ox', modelSearchText).map(r => r.item)
+    expect(ranked).toContain('x-preview-f-free')
+    const rankedFull = fuzzyRank(zenModels, 'ox-alpha', modelSearchText).map(r => r.item)
+    expect(rankedFull).toContain('x-preview-f-free')
+  })
 })
diff --git a/ui-tui/src/lib/model-search-text.ts b/ui-tui/src/lib/model-search-text.ts
index bc7732ad69..487015e4ea 100644
--- a/ui-tui/src/lib/model-search-text.ts
+++ b/ui-tui/src/lib/model-search-text.ts
@@ -9,7 +9,10 @@
  * hermes_cli/model_search.py.
  */
 const MODEL_SEARCH_ALIASES: Record<string, readonly string[]> = {
-  k3: ['kimi-k3', 'kimi']
+  k3: ['kimi-k3', 'kimi'],
+  // OpenCode Zen serves the "Ox Alpha" stealth model under an opaque
+  // preview slug; let users find it by its public codename.
+  'x-preview-f-free': ['ox-alpha', 'ox']
 }
 
 /** Haystack for fuzzy/substring model search; never changes the wire id. */
diff --git a/web/src/lib/model-search-text.ts b/web/src/lib/model-search-text.ts
index 471d80c472..ab64c5c7c0 100644
--- a/web/src/lib/model-search-text.ts
+++ b/web/src/lib/model-search-text.ts
@@ -10,6 +10,9 @@
  */
 const MODEL_SEARCH_ALIASES: Record<string, readonly string[]> = {
   k3: ["kimi-k3", "kimi"],
+  // OpenCode Zen serves the "Ox Alpha" stealth model under an opaque
+  // preview slug; let users find it by its public codename.
+  "x-preview-f-free": ["ox-alpha", "ox"],
 };
 
 /** Haystack for fuzzy/substring model search; never changes the wire id. */