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openai/openai-python v3.19.1
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## [3.19.1](https://github.com/openai/openai-python/compare/v3.19.0...v3.19.1) (2026-09-23) ### Bug Fixes * **chat:** preserve single-pass tool iterables ([#3770](https://github.com/openai/openai-python/issues/3770)) ([33ffa1f](https://github.com/openai/openai-python/commit/33ffa1f9fa4f49553ab0287b9359283be818fe40)) * **client:** merge HTTP headers case-insensitively ([#3486](https://github.com/openai/openai-python/issues/3486)) ([5e39766](https://github.com/openai/openai-python/commit/5e39766dd7ba2802c97f5305721a621098cf0e38)) ### Chores * **api:** clarify Chat Completions seed limits ([#3945