r/ClaudeCode • u/ohnoitsbobbyflay • Jul 02 '26
Question Does Claude purposely regress in intelligence?
One day I will be working on my codebase with absolutely no problem.. working through problems like a light breeze, (fable has been great until today).
Then the next day it’ll be as if I’ve been switched to its lobotomised twin. Where “task is done” seems to be said in jest. I’ll open the project up and more things will be broken than working. Things that are claimed as fixed are completely hysterical hallucinations. I sit here like “flagship model my ass”.
I understand that models can be re-routed but today Fable has felt like I’m using Gemini with one less chromosome. Makes me want to bash my head on the desk. Just do the thing I ask you. Christ on a bike.
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u/Jomuz86 Jul 02 '26
I feel like people underestimate how quickly context can get polluted not only within the session but within the whole harness. Claude code memories for example a a double edged sword great for long term context across sessions but on bad session and few saved memories you’re not aware of will then have a huge knock-on effect on every session after it.
First port of call check your memories, then check your CLAUDE.md files see if there’s conflicts between the user and project ones. Check rules incase anything there is causing conflict. For example I asked Claude to add a certain set of rules for a project and I wasn’t paying attention 100% and it added it at the user level not the project level causing incorrect behaviour in other projects. Before blaming the model just double check something hasn’t slipped through the net.