[BUG] Unable to force scheduled task to run on Opus 4.7. Keeps running them on Sonnet.

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I set up 12 schedules tasks on my system, always choosing to run on Opus 4.7 1M Max, also i explicitly mention inside the task instructions to only use OPus 4.7 as model, but when running automatically in the night it keeps using Sonnet with very superficial outcome.

What Should Happen?

I must run always in Opus 4.7 1M Max.

Error Messages/Logs

After trying to force,Claude itself asked me to post this request her to Anthropic.

Steps to Reproduce

I dont have information about this

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Claude 1.3883.0 (93ff6c) 2026-04-21T17:24:01.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_