Ted Sanders explains OpenAI's model naming convention: Luna < Terra < Sol < Astra

OpenAI's Ted Sanders explains its model naming convention: models are ranked by Luna. < Terra < Sol < Astra's ranking system prioritizes scale: larger models offer superior performance and reliability but incur higher per-token costs. They also excel at retrieving obscure facts. Version numbers indicate release order, relationship to other versions, and the magnitude of improvements; for instance, version 6.1 was released after 5.6, shares training data and style with its peer 6.1 models, yet the incremental gains are insufficient to warrant a version 7 designation.