# OpenAI Python SDK moves default HTTP clients to HTTPX2

_Friday, August 28, 2026 at 7:51 AM EDT · AI · Latest · Tier 2 — Notable_

![OpenAI Python SDK moves default HTTP clients to HTTPX2 — Primary](https://repository-images.githubusercontent.com/307213173/7b83a5a7-a102-4b8a-abe7-7c14267908fa)

The OpenAI Python SDK now uses HTTPX2 for its synchronous and asynchronous default HTTP clients. The migration removes the SDK's transitive installation of legacy HTTPX and changes the default TLS trust store from certifi to the operating system's trust store. Existing API calls, streaming, authentication, retries and numeric timeouts continue to work for clients using the default configuration. Applications with custom transports, proxy integrations, instrumentation or HTTPX-only test tooling may need migration work.

## Sources

- [GitHub](https://github.com/openai/openai-python/blob/main/httpx2.md)

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Retrieved: 2026-08-28T14:43:02.170Z
Publisher: Tech & Business (techandbusiness.org)