diff --git a/.changeset/dark-otters-sip.md b/.changeset/dark-otters-sip.md
new file mode 100644
index 00000000..1a7e4923
--- /dev/null
+++ b/.changeset/dark-otters-sip.md
@@ -0,0 +1,5 @@
+---
+'task-master-ai': patch
+---
+
+Adjusts default main model model to Claude Sonnet 4. Adjusts default fallback to Claude Sonney 3.7"
diff --git a/.taskmasterconfig b/.taskmasterconfig
index f727bc0a..c2535b8c 100644
--- a/.taskmasterconfig
+++ b/.taskmasterconfig
@@ -1,32 +1,32 @@
 {
-  "models": {
-    "main": {
-      "provider": "anthropic",
-      "modelId": "claude-sonnet-4-20250514",
-      "maxTokens": 120000,
-      "temperature": 0.2
-    },
-    "research": {
-      "provider": "perplexity",
-      "modelId": "sonar-pro",
-      "maxTokens": 8700,
-      "temperature": 0.1
-    },
-    "fallback": {
-      "provider": "anthropic",
-      "modelId": "claude-3-7-sonnet-20250219",
-      "maxTokens": 8192,
-      "temperature": 0.2
-    }
-  },
-  "global": {
-    "logLevel": "info",
-    "debug": false,
-    "defaultSubtasks": 5,
-    "defaultPriority": "medium",
-    "projectName": "Taskmaster",
-    "ollamaBaseUrl": "http://localhost:11434/api",
-    "userId": "1234567890",
-    "azureOpenaiBaseUrl": "https://your-endpoint.openai.azure.com/"
-  }
-}
\ No newline at end of file
+	"models": {
+		"main": {
+			"provider": "anthropic",
+			"modelId": "claude-sonnet-4-20250514",
+			"maxTokens": 50000,
+			"temperature": 0.2
+		},
+		"research": {
+			"provider": "perplexity",
+			"modelId": "sonar-pro",
+			"maxTokens": 8700,
+			"temperature": 0.1
+		},
+		"fallback": {
+			"provider": "anthropic",
+			"modelId": "claude-3-7-sonnet-20250219",
+			"maxTokens": 128000,
+			"temperature": 0.2
+		}
+	},
+	"global": {
+		"logLevel": "info",
+		"debug": false,
+		"defaultSubtasks": 5,
+		"defaultPriority": "medium",
+		"projectName": "Taskmaster",
+		"ollamaBaseUrl": "http://localhost:11434/api",
+		"userId": "1234567890",
+		"azureOpenaiBaseUrl": "https://your-endpoint.openai.azure.com/"
+	}
+}