temporary fix for max output token

packages/opencode/src/session/index.ts

@@ -927,7 +927,7 @@ export namespace Session {
       },
       maxRetries: 3,
       activeTools: Object.keys(tools).filter((x) => x !== "invalid"),
-      maxOutputTokens: outputLimit,
+      maxOutputTokens: model.info.id.startsWith("gpt-5") ? undefined : outputLimit,
       abortSignal: abort.signal,
       stopWhen: stepCountIs(1000),
       providerOptions: {