[MODEL] Sonnet 4.5 or default in claude code

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Other unexpected behavior

What You Asked Claude to Do

"Claude read the files but didn't apply them carefully when writing specs" — the most useful report would include:

• The exact task (spec writing)
• What I missed (method present in reference file, wrong path without verification)
• What the other model caught
• suggestion: Claude should do a verification pass against source files before finalising a spec

What Claude Actually Did

simply being lethargic and not doing proper review :)

Expected Behavior

Claude should do a verification pass against source files before finalising a spec

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Haven't tried to reproduce

Steps to Reproduce

_No response_

Claude Model

Sonnet

Relevant Conversation

For feedback to Anthropic:

  The best direct channel is: https://github.com/anthropics/claude-code/issues

  For this specific type of feedback — "Claude read the files but didn't apply them carefully when writing specs" — the most useful report would include:
  - The exact task (spec writing)
  - What I missed (method present in reference file, wrong path without verification)
  - What the other model caught
  - Your suggestion: Claude should do a verification pass against source files before finalising a spec

  That's actionable, reproducible, and specific — the kind of feedback engineering teams can actually use.

  Alternatively the feedback form at claude.ai (the thumbs down on responses) routes to the product team, but GitHub issues get more visibility for CLI/agentic use
  cases since that's where the Claude Code team actively monitors.

  Your testing across multiple models simultaneously and comparing outputs is genuinely useful signal — most users don't do that.

Impact

High - Significant unwanted changes

Claude Code Version

2.1.104 (Claude Code)

Platform

Anthropic API

Additional Context

_No response_