diff --git a/check_missing_packages.py b/check_missing_packages.py
index 840fc9d..7c93985 100644
--- a/check_missing_packages.py
+++ b/check_missing_packages.py
@@ -25,49 +25,23 @@ from rich.table import Table
 from rich.text import Text
 
 from common import parse_wheel_filename
-from create_matrix import (
-    EXCLUDE,
-    LINUX_ARM64_MATRIX,
-    LINUX_ARM64_SELF_HOSTED_MATRIX,
-    LINUX_MATRIX,
-    LINUX_SELF_HOSTED_MATRIX,
-    WINDOWS_CODEBUILD_MATRIX,
-    WINDOWS_MATRIX,
-    WINDOWS_SELF_HOSTED_MATRIX,
-)
+from coverage_matrix import LINUX_ARM64_MATRIX, LINUX_MATRIX, WINDOWS_MATRIX
+from create_matrix import EXCLUDE
 
 
 # Comprehensive matrix combining all platform-specific matrices
 def get_comprehensive_matrix(platform: str) -> dict:
-    """Get comprehensive matrix for a platform by merging all related matrices."""
+    """Get comprehensive matrix for a platform."""
     if platform == "linux":
-        # Merge LINUX_MATRIX and LINUX_SELF_HOSTED_MATRIX
-        return merge_matrices([LINUX_MATRIX, LINUX_SELF_HOSTED_MATRIX])
+        return LINUX_MATRIX
     elif platform == "linux_arm64":
-        return merge_matrices([LINUX_ARM64_MATRIX, LINUX_ARM64_SELF_HOSTED_MATRIX])
+        return LINUX_ARM64_MATRIX
     elif platform == "windows":
-        return merge_matrices(
-            [WINDOWS_MATRIX, WINDOWS_SELF_HOSTED_MATRIX, WINDOWS_CODEBUILD_MATRIX]
-        )
+        return WINDOWS_MATRIX
     else:
         return {}
 
 
-def merge_matrices(matrices: list[dict]) -> dict:
-    """Merge multiple matrices by combining their version lists."""
-    merged = {
-        "flash-attn-version": set(),
-        "python-version": set(),
-        "torch-version": set(),
-        "cuda-version": set(),
-    }
-    for matrix in matrices:
-        for key in merged:
-            merged[key].update(matrix.get(key, []))
-    # Convert sets to sorted lists
-    return {key: sorted(vals, key=parse_version_tuple) for key, vals in merged.items()}
-
-
 def parse_version_tuple(version: str) -> tuple:
     """Parse version string to tuple for sorting."""
     parts = version.replace("post", ".").split(".")
diff --git a/coverage_matrix.py b/coverage_matrix.py
new file mode 100644
index 0000000..19ae8b1
--- /dev/null
+++ b/coverage_matrix.py
@@ -0,0 +1,74 @@
+"""Coverage matrix definitions for wheel availability checks."""
+
+LINUX_MATRIX = {
+    "flash-attn-version": [
+        "2.6.3",
+        "2.7.4",
+        "2.8.3",
+    ],
+    "python-version": [
+        "3.10",
+        "3.11",
+        "3.12",
+        "3.13",
+        "3.14",
+    ],
+    "torch-version": [
+        "2.5.1",
+        "2.6.0",
+        "2.7.1",
+        "2.8.0",
+        "2.9.1",
+        "2.10.0",
+    ],
+    "cuda-version": [
+        "12.4",
+        "12.6",
+        "12.8",
+        "13.0",
+    ],
+}
+
+LINUX_ARM64_MATRIX = {
+    "flash-attn-version": [
+        "2.8.3",
+    ],
+    "python-version": [
+        "3.10",
+        "3.11",
+        "3.12",
+        "3.13",
+        "3.14",
+    ],
+    "torch-version": [
+        "2.9.1",
+        "2.10.0",
+    ],
+    "cuda-version": [
+        "12.6",
+        "12.8",
+        "13.0",
+    ],
+}
+
+WINDOWS_MATRIX = {
+    "flash-attn-version": [
+        "2.8.3",
+    ],
+    "python-version": [
+        "3.10",
+        "3.11",
+        "3.12",
+        "3.13",
+        "3.14",
+    ],
+    "torch-version": [
+        "2.9.1",
+        "2.10.0",
+    ],
+    "cuda-version": [
+        "12.6",
+        "12.8",
+        "13.0",
+    ],
+}