MAINT: Deprecating Dall-E specific parameters and aligning OpenAIImageTarget with GPT Image endpoints - #1661
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…eTarget with GPT Image endpoints (microsoft#1661)
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Description
Dall-E models are shut down in AzureOpenAI and are expected to shut down on OpenAI platform on 2026-05-12. This PR provides deprecation warnings when Dall-E specific params and param values (i.e., non-compatible with GPT Image endpoints) are passed in when instantiating an
OpenAIImageTarget. It also makes available an additionalbackgroundparam that can be used for GPT Image models. Docstrings are updated accordingly.Tests and Documentation
New unit tests added for param adjustments and warnings. Jupyter notebook was re-ran with new param options to ensure functionality.