Add GLM-5.3-Flash and set as default model

opencode.json

@@ -49,6 +49,19 @@
             "no-thinking": { "reasoningEffort": "none" }
           }
         },
+        "GLM-5.3-Flash": {
+          "name": "GLM-5.3-Flash",
+          "limit": { "context": 524288, "output": 131072 },
+          "cost": { "input": 0.15, "output": 0.50, "cache_read": 0.03 },
+          "reasoning": true,
+          "interleaved": { "field": "reasoning_content" },
+          "modalities": { "input": ["text", "image"], "output": ["text"] },
+          "variants": {
+            "max": { "reasoningEffort": "max" },
+            "high": { "reasoningEffort": "high" },
+            "low": { "reasoningEffort": "low" }
+          }
+        },
         "Qwen3-4B-Instruct-2507-GGUF-Q4_K_XL": {
           "limit": { "context": 32768, "output": 32768 },
           "name": "Qwen3-4b"
@@ -56,6 +69,6 @@
       }
     }
   },
-  "model": "zuccaro/DeepSeek-V4-Flash-0731",
+  "model": "zuccaro/GLM-5.3-Flash",
   "small_model": "zuccaro/Qwen3.8-27B-NVFP4"
 }