For personal use I've noticed Claude (via the web-based chat UI) making really bizarre mistakes lately like ignoring input or making completely random assumptions. At work Claude Code has turned into an absolute dog. It fails to follow instructions and builds stuff like a lazy junior developer without any architecture, tests, or verification. This is even with max effort, Opus 4.6, multiple agents, early compaction, etc. I don't know what they did but Anthropic's quality lead has basically evaporated for me. I hope they fix it because I've since adapted my project's Claude artifacts for use with Codex and started using it instead - it feels like Claude Code did earlier this year.

I'd like to give the new GLM models a try for personal stuff.