~ / tag / #system-prompt $ grep

#System Prompt

1 post

Did Claude Opus 5 Get Worse? Better on Benchmarks, Worse to Live With

The threads say Claude Opus 5 regressed, and Google already answers yes. But the most likely explanation isn't a model nerf: Anthropic cut more than 80% of Claude Code's built-in system prompt for the Claude 5 generation. The restraint defaults are gone, and the responsibility moved to your CLAUDE.md. What you can measure, what's perception, and how to tame it without switching vendors.

01 Sep · 7 min ›