[BUG] /model selector shows misleading pricing for Sonnet 1M context option

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?

❯ /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. Default (recommended) ✔  Use the default model (currently Sonnet 4.6) · $3/$15 per Mtok
    2. Sonnet (1M context)      Sonnet 4.6 for long sessions · $3/$15 per Mtok
    3. Opus (1M context)        Opus 4.6 with 1M context [NEW] · Most capable for complex work
    4. Haiku                    Haiku 4.5 · Fastest for quick answers · $1/$5 per Mtok

Option 2 (Sonnet 1M context) displays $3/$15 per Mtok — the same as option 1 — but Sonnet 4.6 pricing increases to $6/$22.50 per Mtok for inputs exceeding 200K tokens. The UI should either show the tiered pricing or add a disclaimer that costs increase beyond 200K tokens.

What Should Happen?

It should show correct pricing

Error Messages/Logs

Steps to Reproduce

do /model in cli

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.1.76

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_