Sdk

Three SDKs have emerged as the default starting points when teams reach for an AI agent framework in 2026: AWS Strands Agents, the OpenAI Agents SDK, and Mastra. Each reflects a different design philosophy — model-driven minimalism, industry-standard tooling, and batteries-included TypeScript — and each is genuinely good at what it targets. This comparison cuts through the marketing to give you a technical, opinionated view of all three so you can make the right call for your project without burning two weeks on trials. ...

OpenAI Agents SDK v2, released April 15, 2026, transforms the framework from a pure orchestrator into a full execution environment with configurable memory, sandboxed code execution, apply_patch filesystem tools, and support for 100+ LLMs — the most significant overhaul since the SDK replaced the experimental Swarm library in March 2025. What Is OpenAI Agents SDK v2? OpenAI Agents SDK v2 is the April 15, 2026 update to OpenAI’s open-source Python framework for building production-grade AI agents. The update — the largest since the SDK’s March 2025 launch — introduces a model-native harness that wraps the entire lifecycle of agent execution: memory management, tool access, sandbox orchestration, and filesystem operations. Unlike the v1 pure orchestrator design that left developers to wire up their own context, storage, and execution layers, v2 ships a turnkey harness that handles these concerns while remaining fully configurable. The SDK now supports over 100 non-OpenAI LLMs via the Chat Completions API, removing what had been the framework’s biggest criticism: vendor lock-in. With more than 4 million weekly users of OpenAI Codex as of 2026, the developer appetite for agentic tooling at this level is validated. The v2 harness covers five domains: configurable memory, filesystem tools (apply_patch and shell), sandbox execution across 7 providers, workspace manifests via AGENTS.md, and skills for progressive feature disclosure. ...