release: 0.51.0

[stainless-app]

Automated Release PR

0.51.0 (2026-05-12)

Full Changelog: v0.50.0...v0.51.0

Features

• api: api update (6fe066e)
• api: api update (eac4b8f)
• api: api update (66aa7dc)
• internal/types: support eagerly validating pydantic iterators (3e9c5ac)
• support setting headers via env (38de0ee)

Bug Fixes

• client: add missing f-string prefix in file type error message (fe74792)
• use correct field name format for multipart file arrays (361fcd6)

Chores

• internal: reformat pyproject.toml (8802c53)

---

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🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

---

Note

Medium Risk
Medium risk: changes touch request construction (multipart file field naming and default headers via env) and Pydantic v2 core-schema behavior, which can affect runtime serialization/validation and API request compatibility.

Overview
Bumps the package/version metadata to 0.51.0 and refreshes the generated OpenAPI-derived client/types (.stats.yml, CHANGELOG.md, __version__).

Adds support for setting default request headers via MIXEDBREAD_CUSTOM_HEADERS in both sync/async clients, and fixes an error message in async_to_httpx_files.

Updates multipart file extraction to respect an array_format when generating field names (e.g. files[] vs files[0] vs repeated keys), centralizes ArrayFormat/NestedFormat in _types, and adjusts tests accordingly.

Introduces EagerIterable for Pydantic v2 to eagerly consume/validate Iterable inputs (avoiding iterator consumption on repeated dumps), plus small generated type additions (new store facets limits, agentic search options, audio chunk summary, and a Pydantic extra-field compat tweak in StoreSearchResponse).

^{Reviewed by Cursor Bugbot for commit 748e191. Bugbot is set up for automated code reviews on this repo. Configure here.}

[stainless-app]

🧪 Testing

To try out this version of the SDK:

pip install 'https://pkg.stainless.com/s/mixedbread-python/3e9c5ac9ab56db4eddf8a6a2f219a8789c9c45ac/mixedbread-0.50.0-py3-none-any.whl'

Expires at: Thu, 11 Jun 2026 03:32:23 GMT
Updated at: Tue, 12 May 2026 03:32:23 GMT

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