Anthropic releases advanced tool use in beta
advanced tool use beta — Tool Search Tool, Programmatic Tool Calling
Why it matters
Cut tool tokens by 85% while MCP evaluation accuracy rose from 49% to 74% on Opus 4 — the paradox that showing fewer tools makes the model more accurate
Source — Primary sources first; secondary reports are labelled “Press”
Officialanthropic.comhttps://www.anthropic.com/engineering/advanced-tool-useAdded in Week 35, 2026 · See that week