diff --git a/README.md b/README.md
index 070ac47..edf8a46 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,9 @@ llm models default grok-3-mini-latest
 The following Grok models are available:
 
 - `grok-4-latest` (default)
+- `grok-4-fast`
+- `grok-4-fast-reasoning-latest`
+- `grok-4-fast-non-reasoning-latest`
 - `grok-code-fast-1`
 - `grok-3-latest`
 - `grok-3-mini-fast-latest`
diff --git a/llm_grok.py b/llm_grok.py
index d13fda8..ff4b0d7 100644
--- a/llm_grok.py
+++ b/llm_grok.py
@@ -17,6 +17,9 @@
 AVAILABLE_MODELS = [
     "grok-code-fast-1",
     "grok-4-latest",
+    "grok-4-fast",
+    "grok-4-fast-reasoning-latest",
+    "grok-4-fast-non-reasoning-latest",
     "grok-3-latest",
     "grok-3-fast-latest",
     "grok-3-mini-latest",