{"slug": "anthropic-appears-to-be-a-b-testing-reduced-effort-levels-in-claude-code", "title": "Anthropic appears to be A/B testing reduced effort levels in Claude Code", "summary": "Anthropic is A/B testing reduced effort levels in Claude Code, affecting sessions on version 2.1.236+ with the change applied server-side. The experiment shrinks the effort scale, while older versions and Opus 5 remain unchanged, and not all users will see the change.", "body_md": "update: it's server-side, not the app\nanthropic enrols fable 5 sessions on claude code 2.1.236+ into an experiment that shrinks the effort scale, older versions and opus 5 are left alone\nprobably an a/b test, so not everyone will see it\nif \"high\" feels like \"low\" for you, you're in the test group\nholy fuck anthropic, you guys are unbearable sometimes", "url": "https://wpnews.pro/news/anthropic-appears-to-be-a-b-testing-reduced-effort-levels-in-claude-code", "canonical_source": "https://twitter.com/argofowl/status/2091150597374537729", "published_at": "2026-08-22 16:58:49+00:00", "updated_at": "2026-08-22 17:13:53.616569+00:00", "lang": "en", "topics": ["ai-products", "ai-tools", "artificial-intelligence"], "entities": ["Anthropic", "Claude Code"], "alternates": {"html": "https://wpnews.pro/news/anthropic-appears-to-be-a-b-testing-reduced-effort-levels-in-claude-code", "markdown": "https://wpnews.pro/news/anthropic-appears-to-be-a-b-testing-reduced-effort-levels-in-claude-code.md", "text": "https://wpnews.pro/news/anthropic-appears-to-be-a-b-testing-reduced-effort-levels-in-claude-code.txt", "jsonld": "https://wpnews.pro/news/anthropic-appears-to-be-a-b-testing-reduced-effort-levels-in-claude-code.jsonld"}}