AIFIRST Anthropic A/B testing reduced effort levels in Claude Code
The brief
Users reported that Claude Code appeared to be quietly reducing reasoning effort, raising concerns about undisclosed model behavior changes.
Key points
- Anthropic engineer Thariq confirmed via X that the company is running A/B test configurations in Claude Code that remap numerical effort values, and that the changes are test parameters rather than permanent degradations.
Sources
- redditreddit.com