[Bug] Claude ignores --model flag in prompt mode, uses Sonnet instead of selected model

Bug Description
When claude is started from cli as claude --model haiku -p 'Hello Claude' then it uses Sonnet limits (and probably works as Sonnet).

What is weird when sent started as claude --model haiku /model command shows Haiku as selected

 claude --model haiku

 ▐▛███▜▌   Claude Code v2.1.29
▝▜█████▛▘  Haiku 4.5 · Claude Max
  ▘▘ ▝▝    ~/projects/rate-a-recruiter

❯ /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)  Opus 4.5 · Most capable for complex work
   2. Sonnet                 Sonnet 4.5 · Best for everyday tasks
 ❯ 3. Haiku ✔                Haiku 4.5 · Fastest for quick answers

and continue answering in REPL mode (no limits hit).

But when triggered as: claude --model haiku -p 'Hello Claude'
Then: You've hit your limit · resets Feb 4, 12pm (Europe/Warsaw)

My usage:
Settings: Status Config Usage (←/→ or tab to cycle)
Current session
█████████████████▌ 35% used
Resets 12:59pm (Europe/Warsaw)

Current week (all models)
█████████████ 26% used
Resets Feb 6, 1:59pm (Europe/Warsaw)

Current week (Sonnet only)
██████████████████████████████████████████████████ 100% used
Resets Feb 4, 11:59am (Europe/Warsaw)

---

It's clear to see that running claude --model haiku and continuing in REPL mode and claude --model haiku -p 'prompt' work completely different.

This bug caused me unexpectedly to blow up my Sonnet usage...

Environment Info

• Platform: linux
• Terminal: tmux
• Version: 2.1.29
• Feedback ID: d5138964-3405-47a8-a034-7c90f123af09

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/robson/.local/share/claude/versions/2.1.29 (expected in multi-process scenarios)\n    at $w$ (/$bunfs/root/claude:3586:2098)\n    at xxA (/$bunfs/root/claude:3586:1209)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-01T11:05:47.822Z"}]