Stay free if you only need mit license for commercial use and full python and typescript sdks. Upgrade if you need strong reasoning and multimodal capabilities and 128k context window. Most solo builders can start free.
Why it matters: Best experience is with OpenAI models—non-OpenAI provider support exists but is less polished
Available from: GPT-4o-mini API Usage
Why it matters: API costs can escalate quickly for high-volume agent workloads, especially with o3
Available from: GPT-4o-mini API Usage
Why it matters: Newer framework with a smaller community and ecosystem compared to LangChain or CrewAI
Available from: GPT-4o-mini API Usage
The Agents SDK provides higher-level abstractions for agent loops, tool orchestration, handoffs between agents, guardrails, and tracing. The base API handles individual completions; the SDK manages the full agent lifecycle including multi-turn conversations, tool calling, and error recovery.
Yes. The SDK is designed to be provider-agnostic with documented paths for using non-OpenAI models. However, the best integration and feature coverage is with OpenAI's own models.
Yes. The Agents SDK is the production-ready successor to Swarm, which was an experimental research project. The SDK maintains Swarm's philosophy of minimal abstractions while adding production features like tracing, guardrails, sessions, and official support.
The SDK itself is free and MIT-licensed. You pay standard OpenAI API rates for model usage based on tokens consumed. Agent workloads typically use more tokens than simple completions due to tool calling loops and multi-turn conversations. Volume discounts are available for enterprise customers.
Yes. OpenAI provides both Python and TypeScript SDKs with equivalent functionality, making it accessible to both ecosystems. Install via pip (Python) or npm (TypeScript).
Start with the free plan — upgrade when you need more.
Get Started Free →Still not sure? Read our full verdict →
Last verified March 2026