Claude has really gone downhill in the last month or so. They made a change to move the CLAUDE.md from the system prompt to being occasionally read in, and it really deprioritizes the instructions to the same attention level as the code it's working on.

I've been trying out Codex the last couple days and it's much more adherent and much less prone to lying and laziness. Anthropic says they're working on a significant release in Claude Code, but I'd much rather have them just revert back to the system as it was ~a month ago.

Claude is cooked. GPT5 codex is a much stronger model, and the codex cli is much more performant/robust than cc (even if it has fewer features).

I've never had a model lie to me as much as Claude. It's insane.

true, I was using Cline/Roocode from almost an year and it always made sure to read things from memory-bank which i really liked. Claude has gone downhill from August mid for me and often it doesn't follow instructions from claude.md or forget things mid-way.