OpenAI Agents SDK
OpenAI's production-grade agent framework, successor to Swarm. Core abstraction is explicit handoffs between agents carrying full context. Built for reliable multi-agent pipelines with native OpenAI tool use, tracing, and guardrails.
OpenAI API
API access to GPT-4o, o1, and other OpenAI models including embeddings and image generation. The most widely used LLM API in production.