Claude API adds per-message effort without breaking prompt caching

Claude API now supports per-message effort, letting developers set reasoning effort per message via system message without breaking prompt caching. Combined with routers like Jev, it enables task-adaptive compute allocation.

2026-11-12 ~ 2026-11-12 · 2 related posts

• Claude API's per-message effort lets you switch reasoning levels without breaking prompt cache — lyraxana · 2026-11-12
• Claude API's per-message effort shines when paired with a router, dev says — lyraxana · 2026-11-12