Proactive assistantAgents & Automation
Claude Duet follows connected work in the background
The Opus 5.5 assistant runs on its own virtual computer. Its US research preview shares usage limits with the rest of a Claude plan.
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Agent Systems
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Proactive assistant
Always at workAgents & Automation
OpenAI Dots gives ongoing work its own cloud workspace
GPT-6 Astra agents can continue tasks on a dedicated computer. App permissions and action rules define how that work proceeds.