# OpenAI Python SDK v3.0.0

- Product: OpenAI Python SDK (https://whatsnew.fyi/product/openai-python)
- Vendor: OpenAI
- Date: 2026-08-12
- Version: v3.0.0
- Original notes: https://github.com/openai/openai-python/releases/tag/v3.0.0
- Permalink: https://whatsnew.fyi/product/openai-python/releases/v3.0.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

- **changed** — HTTPX2 is now the default HTTP client, and httpx is no longer installed automatically
- **changed** — Applications using custom HTTPX clients, transports, or configuration objects must migrate to their HTTPX2 equivalents or use the temporary runtime-only legacy HTTPX escape hatch

##### [3.0.0](https://github.com/openai/openai-python/compare/v2.54.0...v3.0.0) (2026-08-12)


###### ⚠ BREAKING CHANGES

* **api:** HTTPX2 is now the default HTTP client, and `httpx` is no longer installed automatically. Applications using custom HTTPX clients, transports, or configuration objects must migrate to their HTTPX2 equivalents or use the temporary, runtime-only legacy HTTPX escape hatch. See the [HTTPX2 migration guide](https://github.com/openai/openai-python/blob/main/httpx2.md).

###### Features

* **api:** migrate to HTTPX2 ([#3594](https://github.com/openai/openai-python/pull/3594))