diff --git a/src/khoj/utils/constants.py b/src/khoj/utils/constants.py
index d00b657b..354e9bcf 100644
--- a/src/khoj/utils/constants.py
+++ b/src/khoj/utils/constants.py
@@ -76,6 +76,8 @@ model_to_cost: Dict[str, Dict[str, float]] = {
     "grok-3-latest": {"input": 3.0, "output": 15.0},
     "grok-3-mini": {"input": 0.30, "output": 0.50},
     "grok-3-mini-latest": {"input": 0.30, "output": 0.50},
+    "grok-4": {"input": 3.0, "cache_read": 0.75, "output": 15.0},
+    "grok-4-fast": {"input": 0.20, "cache_read": 0.05, "output": 0.50},
     # Groq pricing
     "moonshotai/kimi-k2-instruct": {"input": 1.00, "output": 3.00},
     "openai/gpt-oss-120b": {"input": 0.15, "output": 0.75},