diff --git a/aider/resources/model-metadata.json b/aider/resources/model-metadata.json
index 43581d495..8cd469dce 100644
--- a/aider/resources/model-metadata.json
+++ b/aider/resources/model-metadata.json
@@ -550,6 +550,42 @@
         "litellm_provider": "xai",
         "mode": "chat"
     },
+    "openrouter/x-ai/grok-3-fast-beta": {
+        "max_tokens": 131072,
+        "max_input_tokens": 131072,
+        "max_output_tokens": 131072,
+        "input_cost_per_token": 0.000005,
+        "output_cost_per_token": 0.000025,
+        "litellm_provider": "openrouter",
+        "mode": "chat"
+    },
+    "xai/grok-3-fast-beta": {
+        "max_tokens": 131072,
+        "max_input_tokens": 131072,
+        "max_output_tokens": 131072,
+        "input_cost_per_token": 0.000005,
+        "output_cost_per_token": 0.000025,
+        "litellm_provider": "xai",
+        "mode": "chat"
+    },
+    "openrouter/x-ai/grok-3-mini-fast-beta": {
+        "max_tokens": 131072,
+        "max_input_tokens": 131072,
+        "max_output_tokens": 131072,
+        "input_cost_per_token": 0.0000006,
+        "output_cost_per_token": 0.000004,
+        "litellm_provider": "openrouter",
+        "mode": "chat"
+    },
+    "xai/grok-3-mini-fast-beta": {
+        "max_tokens": 131072,
+        "max_input_tokens": 131072,
+        "max_output_tokens": 131072,
+        "input_cost_per_token": 0.0000006,
+        "output_cost_per_token": 0.000004,
+        "litellm_provider": "xai",
+        "mode": "chat"
+    },
     "openrouter/google/gemini-2.0-flash-exp:free": {
         "max_tokens": 8192,
         "max_input_tokens": 1048576,
diff --git a/aider/resources/model-settings.yml b/aider/resources/model-settings.yml
index 25e35526a..42a38cbd0 100644
--- a/aider/resources/model-settings.yml
+++ b/aider/resources/model-settings.yml
@@ -1010,11 +1010,31 @@
   use_repo_map: true
   edit_format: whole
   accepts_settings:
-    - reasoning_effort 
+    - reasoning_effort
   #extra_params:
   #  extra_body:
   #    reasoning_effort: low
 
+- name: openrouter/x-ai/grok-3-fast-beta
+  use_repo_map: true
+  edit_format: diff
+
+- name: xai/grok-3-fast-beta
+  use_repo_map: true
+  edit_format: diff
+
+- name: openrouter/x-ai/grok-3-mini-fast-beta
+  use_repo_map: true
+  edit_format: whole
+  accepts_settings:
+    - reasoning_effort
+
+- name: xai/grok-3-mini-fast-beta
+  use_repo_map: true
+  edit_format: whole
+  accepts_settings:
+    - reasoning_effort
+
 - name: openrouter/openrouter/optimus-alpha
   use_repo_map: true
   edit_format: diff