The Core Trade-off
This comparison is really about where you want to draw the infrastructure boundary. Claude Managed Agents runs your agents in Anthropic's infrastructure. The Claude Agent SDK runs in yours.
Neither is objectively better. The right choice depends on how much infrastructure complexity you're willing to own, your cost model, and whether you have compliance requirements that dictate where data lives.
Managed Agents: What You Get
Anthropic handles the hard parts: state persistence across long-running agents, parallel execution of subagents, retry logic, and monitoring. You define what your agent should do; Anthropic handles making it run reliably.
For most product teams, this is the right starting point. You can ship faster, and the operational overhead of running agents reliably at scale is genuinely complex.
Agent SDK: What You Get
With the SDK, you implement the orchestration yourself. The SDK provides the building blocks — tool definitions, structured outputs, agent handoffs — but you own the execution environment, state management, and reliability patterns.
This is more work. It is also more flexible and, at scale, potentially much cheaper.
Cost Considerations
The SDK runs on your infrastructure against the Claude API. You pay for tokens. Managed Agents adds a layer of infrastructure cost on top of token costs. For low-to-medium volume, the convenience premium is worth it. At high volume, the math changes.
Key Differences
Infrastructure ownership: Anthropic (Managed) vs You (SDK)Flexibility: Less (Managed) vs Full (SDK)Time to production: Hours (Managed) vs Days-to-weeks (SDK)Cost at scale: Higher (Managed) vs Lower (SDK)Data residency: Anthropic infrastructure (Managed) vs Your infrastructure (SDK)Practical Recommendation
Start with Managed Agents unless you have a specific reason not to. The productivity advantage is real. Migrate to the SDK if you hit cost ceilings, need custom execution patterns, or have compliance requirements that make hosted execution problematic.