2022-05 - google imagen research paper posted >>31484562
2022-12 - imagen developers leave google to form ideogram
2023-08 - ideogram ships a version of imagen, free, for anyone who wants to use it https://ideogram.ai/publicly-available
2023-12 - google "imagen 2" is officially "generally available for Vertex AI customers on the allowlist (i.e., approved for access)." >>38628417