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Chat Modes: Configuring the LLM for Each Turn

by Andrey Samsonov —

RubyLLM::Modes is an extension for RubyLLM: before each chat turn, a router picks the instructions, tools, model, and thinking for that reply. The router uses Jev through the new RubyLLM.judge: about 350 ms and $0.04 per 1,000 turns.

https://msg.samsonov.io/2026-09-26-ruby-llm-modes/

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