diff --git a/dist/index.js b/dist/index.js
index c24e496e7..6d9624b9d 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -19721,11 +19721,12 @@ function loadPluginAgents(plugins) {
         const originalDescription = data.description || "";
         const formattedDescription = `(plugin: ${plugin.name}) ${originalDescription}`;
         const mappedModelOverride = mapClaudeModelToOpenCode(data.model);
+        const modelString = mappedModelOverride ? `${mappedModelOverride.providerID}/${mappedModelOverride.modelID}` : undefined;
         const config = {
           description: formattedDescription,
           mode: "subagent",
           prompt: body.trim(),
-          ...mappedModelOverride ? { model: mappedModelOverride } : {}
+          ...modelString ? { model: modelString } : {}
         };
         const toolsConfig = parseToolsConfig(data.tools);
         if (toolsConfig) {
@@ -92687,11 +92688,12 @@ function loadAgentsFromDir(agentsDir, scope) {
       const originalDescription = data.description || "";
       const formattedDescription = `(${scope}) ${originalDescription}`;
       const mappedModelOverride = mapClaudeModelToOpenCode(data.model);
+      const modelString = mappedModelOverride ? `${mappedModelOverride.providerID}/${mappedModelOverride.modelID}` : undefined;
       const config4 = {
         description: formattedDescription,
         mode: data.mode || "subagent",
         prompt: body.trim(),
-        ...mappedModelOverride ? { model: mappedModelOverride } : {}
+        ...modelString ? { model: modelString } : {}
       };
       const toolsConfig = parseToolsConfig2(data.tools);
       if (toolsConfig) {
diff --git a/src/features/claude-code-agent-loader/loader.ts b/src/features/claude-code-agent-loader/loader.ts
index ef84995cb..d2ef89b03 100644
--- a/src/features/claude-code-agent-loader/loader.ts
+++ b/src/features/claude-code-agent-loader/loader.ts
@@ -43,12 +43,15 @@ function loadAgentsFromDir(agentsDir: string, scope: AgentScope): LoadedAgent[]
        const formattedDescription = `(${scope}) ${originalDescription}`
 
        const mappedModelOverride = mapClaudeModelToOpenCode(data.model)
+       const modelString = mappedModelOverride
+         ? `${mappedModelOverride.providerID}/${mappedModelOverride.modelID}`
+         : undefined
 
        const config: ClaudeCodeAgentConfig = {
          description: formattedDescription,
          mode: data.mode || "subagent",
          prompt: body.trim(),
-         ...(mappedModelOverride ? { model: mappedModelOverride } : {}),
+         ...(modelString ? { model: modelString } : {}),
        }
 
        const toolsConfig = parseToolsConfig(data.tools)
diff --git a/src/features/claude-code-plugin-loader/agent-loader.ts b/src/features/claude-code-plugin-loader/agent-loader.ts
index 215e29d1b..1aff57e0c 100644
--- a/src/features/claude-code-plugin-loader/agent-loader.ts
+++ b/src/features/claude-code-plugin-loader/agent-loader.ts
@@ -47,12 +47,15 @@ export function loadPluginAgents(plugins: LoadedPlugin[]): Record<string, Claude
         const formattedDescription = `(plugin: ${plugin.name}) ${originalDescription}`
 
         const mappedModelOverride = mapClaudeModelToOpenCode(data.model)
+        const modelString = mappedModelOverride
+          ? `${mappedModelOverride.providerID}/${mappedModelOverride.modelID}`
+          : undefined
 
         const config: ClaudeCodeAgentConfig = {
           description: formattedDescription,
           mode: "subagent",
           prompt: body.trim(),
-          ...(mappedModelOverride ? { model: mappedModelOverride } : {}),
+          ...(modelString ? { model: modelString } : {}),
         }
 
         const toolsConfig = parseToolsConfig(data.tools)