0.18

• Initial support for async models. Plugins can now provide an AsyncModel subclass that can be accessed in the Python API using the new llm.get_async_model(model_id) method. See async models in the Python API docs and implementing async models in plugins. #507
• OpenAI models all now include async models, so function calls such as llm.get_async_model("gpt-4o-mini") will return an async model.
• gpt-4o-audio-preview model can be used to send audio attachments to the GPT-4o audio model. #608
• Attachments can now be sent without requiring a prompt. #611
• llm models --options now includes information on whether a model supports attachments. #612
• llm models --async shows available async models.
• Custom OpenAI-compatible models can now be marked as can_stream: false in the YAML if they do not support streaming. Thanks, Chris Mungall. #600
• Fixed bug where OpenAI usage data was incorrectly serialized to JSON. #614
• Standardized on audio/wav MIME type for audio attachments rather than audio/wave. [#603](#603