# Is the OpenAI Agents SDK open source?

Yes. Both of OpenAI's own packages, `openai-agents-python` and `openai-agents-js`, ship under the MIT license, so the SDK's source is public, modifiable, and redistributable without asking OpenAI first. That covers the wrapper only: the loop, handoffs, guardrails, and tracing the SDK adds on top of a model call. What the loop calls, OpenAI's models through the Responses API, is unaffected by the license on the code that calls it; running an agent still bills like any other OpenAI usage, open source or not. [The Claude Agent SDK's own license story](/answers/claude-agent-sdk-evals/is-the-claude-agent-sdk-open-source) is only half the same: its Python package is MIT-licensed too, but its TypeScript package is all rights reserved under Anthropic's commercial terms, a per-language split this SDK doesn't have. Either way, reading or changing the wrapper's source doesn't change what running it costs.

---

Sources:
- openai-agents-python, LICENSE: https://github.com/openai/openai-agents-python/blob/main/LICENSE (fetched 2026-10-09)
- openai-agents-js, LICENSE: https://github.com/openai/openai-agents-js/blob/main/LICENSE (fetched 2026-10-09)

Source: https://tessary.ai/answers/openai-agents-sdk-evals/is-the-openai-agents-sdk-open-source
More on Openai agents sdk evals: https://tessary.ai/answers/openai-agents-sdk-evals
From Tessary, agent reliability for AI agents in production: https://tessary.ai