[Bug] Claude Max plan unable to access Claude 4.5 Sonnet 1M context window model

Bug Description
why no 1M sonnet i am on max 200 plan
▐▛███▜▌ Claude Code v2.0.37
▝▜█████▛▘ Sonnet 4.5 · Claude Max
▘▘ ▝▝ /workspaces/kanaeru

/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) Sonnet 4.5 · Smartest model for daily use ✔

1. Opus Legacy: Opus 4.1 · Reaches usage limits faster
2. Haiku Haiku 4.5 · Fastest model for simple tasks

Enter to confirm · Esc to exit

Environment Info

• Platform: linux
• Terminal: vscode
• Version: 2.0.37
• Feedback ID: 3fc32244-c226-4d67-ae49-4e1b862cafa9

Errors

[{"error":"Error: Lock file is already being held\n    at <anonymous> (/$bunfs/root/claude:87:11926)\n    at K (/$bunfs/root/claude:86:5166)\n    at <anonymous> (node:fs:247:13)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-12T06:06:10.583Z"}]