diff --git a/hermes_cli/main.py b/hermes_cli/main.py
index c7ac1100816..c2c8a6880d2 100644
--- a/hermes_cli/main.py
+++ b/hermes_cli/main.py
@@ -2887,7 +2887,7 @@ def _model_flow_xai_oauth(_config, current_model=""):
         pass
 
     models = list(_PROVIDER_MODELS.get("xai-oauth") or _PROVIDER_MODELS.get("xai") or [])
-    selected = _prompt_model_selection(models, current_model=current_model or (models[0] if models else "grok-code-fast-1"))
+    selected = _prompt_model_selection(models, current_model=current_model or (models[0] if models else "grok-4.3"))
     if selected:
         _save_model_choice(selected)
         _update_config_for_provider("xai-oauth", base_url)
diff --git a/tests/run_agent/test_run_agent_codex_responses.py b/tests/run_agent/test_run_agent_codex_responses.py
index 8cc02629523..5652281eb42 100644
--- a/tests/run_agent/test_run_agent_codex_responses.py
+++ b/tests/run_agent/test_run_agent_codex_responses.py
@@ -581,7 +581,7 @@ def test_run_conversation_codex_refreshes_after_401_and_retries(monkeypatch):
 def _build_xai_oauth_agent(monkeypatch):
     _patch_agent_bootstrap(monkeypatch)
     agent = run_agent.AIAgent(
-        model="grok-code-fast-1",
+        model="grok-4.3",
         provider="xai-oauth",
         api_mode="codex_responses",
         base_url="https://api.x.ai/v1",
@@ -619,7 +619,7 @@ def test_build_api_kwargs_xai_oauth_sends_cache_key_via_extra_body(monkeypatch):
         ]
     )
 
-    assert kwargs.get("model") == "grok-code-fast-1"
+    assert kwargs.get("model") == "grok-4.3"
     # Top-level kwarg must NOT be set — that's the openai SDK
     # incompatibility this whole indirection exists to dodge.
     assert "prompt_cache_key" not in kwargs