[BUG] Opus 4.8 missing from /model picker in CLI and VS Code extension

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?

Opus 4.8 missing from /model picker in CLI and VS Code extension
Works fine in the desktop app (same Accenture enterprise account)
Tried versions 2.1.196, 2.1.197, 2.1.198 — all affected
settings.json model override to claude-opus-4-8 is also ignored (still reports Sonnet)

Was workign as of last night/this morning, but not now.

What Should Happen?

I should be able to pick opus 4.8

Error Messages/Logs

Steps to Reproduce

open vs code with claude code, /model and opus not in pick list, only sonnet and haiku

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.198

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_