Claude Agent SDK
The harness behind Claude Code, as a library
Verdict
Gives you the same loop, tools, context management and permissions that power Claude Code, from Python or TypeScript. A strong choice for long-running agents that work with files and commands. Tied to Claude models, so weigh that if you need to switch providers.
Other AI Agents & Platforms
- OpenAI Responses APIProduction
OpenAI's current API for building agents — merges Chat Completions simplicity with Assistants-era tool use
- OpenAI Assistants APISuperseded
Managed agent platform with tools, files, and persistent threads — shut down in favour of the Responses API
- Claude MCP / Tool UseProduction
Anthropic's Model Context Protocol for universal tool integration
- Microsoft Copilot StudioProduction
Enterprise agent builder with Microsoft 365 and Azure integration
- AutoGenSuperseded
Microsoft's multi-agent conversation framework — succeeded by Microsoft Agent Framework
- CrewAIStable
Role-based multi-agent framework with simple, intuitive API