**Anthropic's recent releases of Claude Opus 5.5 and the proactive Claude Duet agent have solidified trader consensus around its 72% implied probability for the leading AI agent by end of November.** The Opus 5.5 model excels in agentic coding and knowledge work while running 40% cheaper than prior versions, and Duet—launched in late October as a research preview—uses persistent cloud VMs, 6,000+ connectors, and strict approval gates to handle ongoing business tasks across apps like Slack and Gmail. Independent benchmarks rank Claude variants highest for agent fit and tool reliability, while Anthropic's guidance favoring single-agent loops over complex multi-agent setups has resonated in enterprise deployments. OpenAI's Dots and other rivals trail in market-implied odds amid these verified advances in capability, safety, and cost efficiency.