Gemini 2.5 pro preview TTS operations in Batch support?

According to documentation this model has batch pricing and @Logan_Kilpatrick confirmed its correct. (https://discuss.ai.google.dev/t/gemini-api-tts-batching-support-a-contradiction/111979)

Yet i see nothing in documentations on how to approach this, how to convert data to wav file whats the python examples. i need something to work on. no sorting order, no stylisation prompting format. I’d really need some help here?

my code currently just says

Job creation failed: 404 NOT_FOUND. {‘error’: {‘code’: 404, ‘message’: ‘models/gemini-2.5-pro-preview-tts is not found for API version v1beta, or is not supported for batchGenerateContent. Call ListModels to see the list of available models and their supported methods.’, ‘status’: ‘NOT_FOUND’}}

I have 50,000 german sentences that i need named and converted to wav file using gemini 2.5 pro tts api, but cant seem to figure out as we have no documentation on batch with TTS.