Duet, LangSmith's Agent Gateway, and the Model Router Arms Race

Two tools shipped this week that both try to solve "too many knobs, too little trust": LangSmith's new LLM Gateway puts spend caps and model fallbacks in front of production agents, while Anthropic's Claude Duet tries to earn trust as a personal agent and, per both Lenny Rachitsky and Dan Shipper, isn't quite there yet.