[BUG] Haiku 4.5 not available in v2.0.19

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?

Haiku 4.5 is not listed to select.

What Should Happen?

I should be able to select Haiku 4.5

Error Messages/Logs

▐▛███▜▌   Claude Code v2.0.19
▝▜█████▛▘  Sonnet 4.5 · Claude Pro
  ▘▘ ▝▝    L:\ai\scFrame

> /model

───────────────────────────────────────────────────────────────────────────────────────────────────────────────
 Select model
 Switch between Claude models. Applies to this session and future Claude Code sessions. For other/previous
 model names, specify with --model.

 > 1. Sonnet   Sonnet 4.5 · Smartest model for daily use · $3/$15 per Mtok √

 Want Opus 4.1? Run /upgrade to upgrade to Max

 Enter to confirm · Esc to exit

Steps to Reproduce

1. Update to 2.0.19
2. /model

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.0.19 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

I'm using CC in Windows with a Pro subscription.

<img width="973" height="340" alt="Image" src="https://github.com/user-attachments/assets/810bee9f-8f60-48bf-9059-fbfd442d01e4" />