Update opencode.json

opencode.json

@@ -54,6 +54,9 @@
         "Blackwell-Auto": {
           "name": "Blackwell-Auto",
           "reasoning": true,
+          "limit": { "context": 524288, "output": 131072 },
+          "interleaved": { "field": "reasoning_content" },
+          "modalities": { "input": ["text", "image"], "output": ["text"] },
           "variants": {
             "high": { "reasoningEffort": "high" },
             "medium": { "reasoningEffort": "medium" },