OpenAI Agents SDK

Lightweight agent orchestration from OpenAI

What OpenAI Agents SDK does

  • Lightweight agent orchestration from OpenAI
  • Agent handoffs, guardrails and tracing
  • Tool and function calling built in
  • Open-source, pay only for model usage

OpenAI Agents SDK — straight answers

What is OpenAI Agents SDK?

OpenAI Agents SDK is listed under Agent Frameworks (Developers), in the AI Agents & Automation category on Flocci AI Tools. Lightweight agent orchestration from OpenAI. It is free, with no paid plan attached, and it lives at openai.github.io.

Is OpenAI Agents SDK free?

OpenAI Agents SDK is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 115 entries on Flocci AI Tools with no upgrade path built in.

What can OpenAI Agents SDK do?

OpenAI Agents SDK does 4 things the catalog singles out: Lightweight agent orchestration from openai; agent handoffs, guardrails and tracing; tool and function calling built in; open-source, pay only for model usage.

What is the best free alternative to OpenAI Agents SDK?

Agno is the closest free alternative: it sits in the same Agent Frameworks (Developers) sub-category and is free. AWS Strands Agents, DSPy and Google Agent Development Kit (ADK) also start free. The full list is on the alternatives page.

See the full list →

OpenAI Agents SDK alternatives

Compare all alternatives →

LangGraph

Agent Frameworks (Developers)
free
  • Build stateful, multi-agent apps as graphs
  • Human-in-the-loop and durable execution
  • Works with any LLM
  • Open-source with a hosted platform

CrewAI

Agent Frameworks (Developers)
freemium
  • Role-based multi-agent 'crews'
  • Simple Python API for collaboration
  • Tasks, tools and flows
  • Open-source core

Microsoft AutoGen

Agent Frameworks (Developers)
free
  • Multi-agent conversation framework
  • Event-driven, async agent design
  • Studio UI for prototyping
  • Fully open-source

LlamaIndex

Agent Frameworks (Developers)
freemium
  • Leading framework for RAG and data agents
  • Connect LLMs to your documents & APIs
  • Agentic document workflows
  • Open-source with a hosted cloud

Google Agent Development Kit (ADK)

Agent Frameworks (Developers)
free
  • Open-source Python/Java framework from Google for building multi-agent systems
  • Native integration with Vertex AI Agent Engine and Gemini models
  • Model-agnostic — works with non-Google LLMs via LiteLLM

Pydantic AI

Agent Frameworks (Developers)
free
  • Type-safe Python agent framework from the Pydantic team, validated structured outputs
  • Model-agnostic (OpenAI, Anthropic, Gemini, Groq, Mistral, local)
  • Built-in dependency injection and streaming; pairs with Pydantic Logfire for observability

Head-to-head comparisons