rework default model

packages/opencode/src/provider/provider.ts

@@ -627,7 +627,7 @@ export namespace Provider {
     }
   }
 
-  const priority = ["gemini-2.5-pro-preview", "gpt-5", "claude-sonnet-4", "big-pickle"]
+  const priority = ["gpt-5", "claude-sonnet-4", "big-pickle", "gemini-3-pro"]
   export function sort(models: ModelsDev.Model[]) {
     return sortBy(
       models,
@@ -641,42 +641,6 @@ export namespace Provider {
     const cfg = await Config.get()
     if (cfg.model) return parseModel(cfg.model)
 
-    // this will be adjusted when migration to opentui is complete,
-    // for now we just read the tui state toml file directly
-    //
-    // NOTE: cannot just import file as toml without cleaning due to lack of
-    // support for date/time references in Bun toml parser: https://github.com/oven-sh/bun/issues/22426
-    const lastused = await Bun.file(path.join(Global.Path.state, "tui"))
-      .text()
-      .then((text) => {
-        // remove the date/time references since Bun toml parser doesn't support yet
-        const cleaned = text
-          .split("\n")
-          .filter((line) => !line.trim().startsWith("last_used ="))
-          .join("\n")
-        const state = Bun.TOML.parse(cleaned) as {
-          recently_used_models?: {
-            provider_id: string
-            model_id: string
-          }[]
-        }
-        const [model] = state?.recently_used_models ?? []
-        if (model) {
-          return {
-            providerID: model.provider_id,
-            modelID: model.model_id,
-          }
-        }
-      })
-      .catch((error) => {
-        log.error("failed to find last used model", {
-          error,
-        })
-        return undefined
-      })
-
-    if (lastused) return lastused
-
     const provider = await list()
       .then((val) => Object.values(val))
       .then((x) => x.find((p) => !cfg.provider || Object.keys(cfg.provider).includes(p.info.id)))