[BUG] /model command sets wrong model — selecting "opus" sets "haiku"

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?

The /model slash command selects the wrong model. When choosing "opus", it sets the model to "haiku" instead.

Additionally, the model selector toggles between only two options and always defaults back to claude-haiku-4-5-20251001[1m], which fails with a
400 error on Claude Max subscriptions because the long context (1M) beta is not available.

Steps to reproduce

1. Run /model
2. Select "opus"
3. Observe it sets the model to "haiku"

Observed behavior

❯ /model opus
⎿ Set model to haiku

❯ /model
⎿ Set model to claude-haiku-4-5-20251001[1m] (default)

❯ /model
⎿ Set model to Haiku 4.5

The default model claude-haiku-4-5-20251001[1m] also produces:
API Error: 400 {"type":"error","error":{"type":"invalid_request_error",
"message":"The long context beta is not yet available for this subscription."}}

Expected behavior

/model opus should set the model to Claude Opus, and /model should cycle through all available models (Opus, Sonnet, Haiku).

Environment

• Claude Code v2.1.79
• Subscription: Claude Max

What Should Happen?

/model opus should set the model to Claude Opus, and /model should cycle through all available models (Opus, Sonnet, Haiku).

Error Messages/Logs

Steps to Reproduce

1. Run /model
2. Select "opus"
3. Observe it sets the model to "haiku"

Observed behavior

❯ /model opus
⎿ Set model to haiku

❯ /model
⎿ Set model to claude-haiku-4-5-20251001[1m] (default)

❯ /model
⎿ Set model to Haiku 4.5

The default model claude-haiku-4-5-20251001[1m] also produces:
API Error: 400 {"type":"error","error":{"type":"invalid_request_error",
"message":"The long context beta is not yet available for this subscription."}}

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.1.79

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_