llm-anthropic 0.26

Simon Willison released llm-anthropic 0.26, a plugin for the LLM command-line tool, adding support for Claude 5 models (claude-fable-5, claude-sonnet-5, claude-opus-5) and server-side tools including WebSearch, WebFetch, CodeExecution, and AnthropicMCP. The update requires LLM 0.32 and streams reasoning, tool calls, and results as typed events, with simplified thinking controls and a new -R/--hide-reasoning flag.

Release: llm-anthropic 0.26 https://github.com/simonw/llm-anthropic/releases/tag/0.26 Includes new features enabled by LLM 0.32 https://simonwillison.net/2026/Aug/4/new-release-of-llm/ : - New models: claude-fable-5 , claude-sonnet-5 , and claude-opus-5 . 75 , 76 - Added server-side tools for WebSearch , WebFetch , CodeExecution , and AnthropicMCP , available through LLM's -T interface or Python tools= . The previous -o web search options have been removed in favor of -T WebSearch . 79 - Upgraded to llm =0.32 . Reasoning, tool calls, tool results, and server-side tool results now stream as typed events. Reasoning for llm CLI prompts now displays to standard error unless you pass --hide-reasoning/-R .- Simplified extended thinking to thinking and thinking effort low , medium , high , xhigh , or max . Claude 5 models think by default; -o thinking 0 disables thinking for Sonnet 5 and Opus 5, while Fable 5 always thinks. -R/--hide-reasoning now omits reasoning from responses and logs. The thinking budget , thinking display , and thinking adaptive options have been removed. 80 Tags: llm https://simonwillison.net/tags/llm , anthropic https://simonwillison.net/tags/anthropic , claude https://simonwillison.net/tags/claude , model-context-protocol https://simonwillison.net/tags/model-context-protocol