release: 0.51.0

[stainless-app]

Automated Release PR

0.51.0 (2026-05-07)

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

Features

• api: api update (eac4b8f)
• api: api update (66aa7dc)
• support setting headers via env (38de0ee)

Bug Fixes

• use correct field name format for multipart file arrays (361fcd6)

Chores

• internal: reformat pyproject.toml (8802c53)

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📚 Read the docs
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Note

Medium Risk
Medium risk due to changes in request construction: multipart file field names for arrays can now vary by array_format, and the client can inject headers from an environment variable, potentially affecting all outbound requests.

Overview
Bumps the library to 0.51.0 (manifest, package version, changelog) and updates the tracked OpenAPI spec pointer/hash.

Adds support for setting default request headers via MIXEDBREAD_CUSTOM_HEADERS in both sync and async clients, merging env-provided headers with any default_headers passed in.

Fixes multipart file array serialization by making extract_files honor a new array_format parameter (e.g. files[] vs files[0] vs repeated keys), centralizing ArrayFormat/NestedFormat type aliases in _types, and expanding tests accordingly; also extends AgenticSearchConfigParam with strict_top_k and multimodal fields.

^{Reviewed by Cursor Bugbot for commit 93972ec. 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/eac4b8f34275c9377765cfe62f677d5ca36cf061/mixedbread-0.50.0-py3-none-any.whl'

Expires at: Sat, 06 Jun 2026 23:23:14 GMT
Updated at: Thu, 07 May 2026 23:23:14 GMT

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