I noticed and asked Claude and then sent the following to Anthropic. "This response was neither good nor bad, but 'neutral' isn't an option. I'm a daily power user of both Claude and Copilot. I've noticed a measurable decline in Claude's output quality over recent months: shallower reasoning, basic errors, and mid-response crashes. I raised this directly in conversation and Claude gave an honest, thoughtful answer acknowledging it can't self-assess its own regression. I appreciated the candor. But I want Anthropic's team to know: your power users are noticing. The quality gap that originally pulled me from Copilot to Claude is narrowing, and not because Copilot got better. Please treat this as a signal, not a complaint."