[OpenAI Releases Three GPT-5.6 Series Models: Sol, Terra, Luna Share Names with Crypto Projects] OpenAI has unveiled the next-generation GPT-5.6 series models, which include three versions: Sol (flagship model), Terra (balanced model for everyday tasks), and Luna (fast and cost-efficient model). Currently, these models are available in limited preview to select partners, with plans to gradually expand access in the coming weeks. Notably, the naming of these three models has sparked discussion due to their overlap with the names of crypto projects Solana (SOL) and Terra (LUNA).