openai-sdk changedcli-sdks-libraries/libraries/openai-sdk
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211211* `response_format` accepts only `json_schema` with `strict: true`. A request that sets `json_object` or `text` returns a 400 error.
212212* Audio and file inputs are not supported. A request that includes an `input_audio` or `file` content part returns a 400 error.
213213* Prompt caching is not supported, but it is supported in the [Anthropic SDKs](https://platform.claude.com/docs/en/cli-sdks-libraries/overview).
214* The API doesn’t emit [OpenTelemetry spans](https://platform.claude.com/docs/en/manage-claude/opentelemetry) for requests through the compatibility layer. To get these spans, use the native Claude API.
214215* System/developer messages are hoisted and concatenated into the top-level `system` field, wherever they appear in the conversation. To add system instructions partway through a conversation, use [mid-conversation system messages](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages) in the native Claude API.
215216* Depending on the model, text generated for a request that sets `temperature` or `top_p` to a value other than the Claude API’s default might not carry the [text watermark](https://platform.claude.com/docs/en/build-with-claude/text-watermark#sampling-settings). If you rely on the watermark, omit both parameters.
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