diff --git a/cmd/synthetic/main.go b/cmd/synthetic/main.go
index 7b8f872475a1f5dfae469423ac60962695c2105e..58844e47f9bd6e56d519f033753c558385d261a3 100644
--- a/cmd/synthetic/main.go
+++ b/cmd/synthetic/main.go
@@ -159,7 +159,7 @@ func main() {
 		APIKey:              "$SYNTHETIC_API_KEY",
 		APIEndpoint:         "https://api.synthetic.new/openai/v1",
 		Type:                catwalk.TypeOpenAICompat,
-		DefaultLargeModelID: "hf:zai-org/GLM-4.7",
+		DefaultLargeModelID: "hf:moonshotai/Kimi-K2.5",
 		DefaultSmallModelID: "hf:deepseek-ai/DeepSeek-V3.2",
 		Models:              []catwalk.Model{},
 	}
diff --git a/internal/providers/configs/synthetic.json b/internal/providers/configs/synthetic.json
index 06fa8101b3391fd684f86a42072f2b264981a36a..c4688124a536dc4256bcf4609481cdb3e8463f02 100644
--- a/internal/providers/configs/synthetic.json
+++ b/internal/providers/configs/synthetic.json
@@ -4,7 +4,7 @@
   "api_key": "$SYNTHETIC_API_KEY",
   "api_endpoint": "https://api.synthetic.new/openai/v1",
   "type": "openai-compat",
-  "default_large_model_id": "hf:zai-org/GLM-4.7",
+  "default_large_model_id": "hf:moonshotai/Kimi-K2.5",
   "default_small_model_id": "hf:deepseek-ai/DeepSeek-V3.2",
   "models": [
     {