more specific sdxl fingerprint

Author: Stéphane du Hamel

model.cpp

@@ -1461,7 +1461,10 @@ SDVersion ModelLoader::get_sd_version() {
     TensorStorage token_embedding_weight, input_block_weight;
     bool input_block_checked = false;
 
-    bool is_xl   = false;
+    bool has_multiple_encoders   = false;
+    bool is_unet = false;
+
+    bool is_xl = false;
     bool is_flux = false;
 
 #define found_family (is_xl || is_flux)
@@ -1476,10 +1479,22 @@ SDVersion ModelLoader::get_sd_version() {
             if (tensor_storage.name.find("model.diffusion_model.joint_blocks.") != std::string::npos) {
                 return VERSION_SD3;
             }
+            if (tensor_storage.name.find("model.diffusion_model.input_blocks.") != std::string::npos) {
+                is_unet = true;
+                if(has_multiple_encoders){
+                    is_xl = true;
+                    if (input_block_checked) {
+                        break;
+                    }
+                }
+            }
             if (tensor_storage.name.find("conditioner.embedders.1") != std::string::npos || tensor_storage.name.find("cond_stage_model.1") != std::string::npos) {
-                is_xl = true;
-                if (input_block_checked) {
-                    break;
+                has_multiple_encoders = true;
+                if(is_unet){
+                    is_xl = true;
+                    if (input_block_checked) {
+                        break;
+                    }
                 }
             }
             if (tensor_storage.name.find("model.diffusion_model.input_blocks.8.0.time_mixer.mix_factor") != std::string::npos) {