On March 30, Sycamore announced a $65 million seed round to build what its founder calls an operating system for autonomous enterprise AI. On April 8, Anthropic launched Managed Agents in public beta at eight cents per session hour. Seven days later, OpenAI shipped its own model-native harness as an update to the open-source Agents SDK, with no additional first-party runtime fee beyond standard API and tool pricing.
Three moves in sixteen days, each betting on the same observation about the market. The harness is now the product. But the…

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