[BUG] sonnet4.5 ultrathink normal think, unbearable. Fix the context!
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?
Claude forgets the last prompt due to agent use and compacting of context. After that it wants to continue the next task instead of doing a check on last task causing it to lose those memories after the next prompt.
Also, non related to auto-compact as this happens also in the beginning and during a session with enough context left: It simply cant follow orders, it has to give its own spin to the cmds which are always completely off-base.
This happens today regularly, in contrast to yesterday and before that. A slow decrease untill now.
What Should Happen?
Its should act as can be reasonable expected. Not delete files, not remember last prompts, etc.
Error Messages/Logs
Steps to Reproduce
Ask it to do a codebase research with agents and see the context immediately decreasing to auto-compact and then forgetting 50% at least of what it should be doing or was doing.
<img width="1907" height="252" alt="Image" src="https://github.com/user-attachments/assets/cb6ef8c5-9a70-4eb2-a113-c6cfe5e9d288" />
<img width="1170" height="154" alt="Image" src="https://github.com/user-attachments/assets/a05a7a27-3810-4972-8153-92910e4dcf8a" />
<img width="1643" height="193" alt="Image" src="https://github.com/user-attachments/assets/45c75e73-873b-4178-98d1-b8153529918a" />
Claude Model
Sonnet (default)
Is this a regression?
Yes, this worked in a previous version
Last Working Version
_No response_
Claude Code Version
latest
Platform
Anthropic API
Operating System
Ubuntu/Debian Linux
Terminal/Shell
Xterm
Additional Information
_No response_
4 Comments
Found 3 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
you know whats hilarious about it... i see over and over on their marketing channels that claude 4.5 is the best coding model yet! what a fucking laugh.
Just landed a couple fixes, one for frequent auto-compact and another for Claude occasionally losing track of the conversation when using real-time steering. One going out today, the other tomorrow.
This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.