
GPT Models in 2026: Lineup, Pricing and Which to Use
TL;DR GPT models are OpenAI’s family of large language models, sold through the API by the token and through ChatGPT by the seat. The current family is GPT-6.1 Sol, GPT-6.1 Terra, GPT-6 Astra and GPT-6 Luna, plus the earlier GPT-6 Sol. Start on GPT-6.1 Sol for most work, use GPT-6 Luna for routine volume, and move to Astra only where




