Hot take: I can't see any startup building their critical core operations on Claude Managed Agents or any proprietary harness as investable.…

Hot take: I can't see any startup building their critical core operations on Claude Managed Agents or any proprietary harness as investable. The past weeks have shown why it's critical to build on top of an open, neutral framework: ✅ Model diversity (cross-review / critique, less agent groupthink) ✅ Provider-agnostic (outages, random policy changes and suspensions) ✅ Local or fine-tuned LLMs for specialized tasks ✅ Private / E2EE cloud LLMs for tasks needing critical privacy Otherwise your startup will always be resting on an "unstable tectonic plate." All of your IP is in the harness and you truly need full control. And as OSS LLMs improve, you will have (and need) full control over the intelligence layer as well.

For AI agents, when you want every last bit of what is possible, open source is turning out to be the only way
With closed agent platforms like Claude Managed Agents, your agent's memory belongs to them, not you. It's locked behind their API. Agent in…
the real future of the very best vertical products is Model/Harness Choice + Openness easy to deploy infra is nice (great release from Ant) …
Open Everything 🤝 Own your intelligence 🤝 Builder Choice We’re in the v0.1 of deploying agentic intelligence across the economy. Agents ar…
if you don't own your harness, you don't own your memory this is so true. even though Codex is an open source, it generates an encrypted com…
The new Anthropic managed agents API is basically the Letta API that we've had since a year ago, but closed source and with provider lock-in…

Source: Harrison Chase (X) | 2026-04-11

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