docs: document `reasoning_content` output removal as a breaking client change (#50624)

Signed-off-by: fede-kamel <fkamelhar@gmail.com> Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com> Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

Fede Kamelhar committed Aug 3, 2026 at 09:45 UTC 005fa017566177e1a66d75eba7908d326c5acd60
1 file changed +2 -1
docs/features/reasoning_outputs.md
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@@ -6,6 +6,7 @@ Reasoning models return an additional `reasoning` field in their outputs, which
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7 !!! warning
8 `reasoning` used to be called `reasoning_content`. To migrate, directly replace `reasoning_content` with `reasoning`.
9 + It is important that you also update your client code. Otherwise, your client code could silently read an empty `reasoning_content`, even when `reasoning` is populated.
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11 ## Supported Models
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@@ -105,7 +106,7 @@ Streaming chat completions are also supported for reasoning models. The `reasoni
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107 ```
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108 -OpenAI Python client library does not officially support `reasoning` attribute for streaming output. But the client supports extra attributes in the response. You can use `hasattr` to check if the `reasoning` attribute is present in the response. For example:
109 +OpenAI Python client library does not officially support `reasoning` attribute for streaming output. But the client supports extra attributes in the response. You can use `getattr` to check if the `reasoning` attribute is present in the response. For example:
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111 ??? code
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