GPT 5.6 Sol, Luna, and Terra available on Vercel AI Gateway

OpenAI's GPT 5.6 family — Sol, Terra, and Luna — is now available on Vercel's AI Gateway in limited preview. Sol is the flagship most capable, Terra balances performance at half the cost of previous gen, and Luna is the fastest and most affordable. All three are stronger at agentic work across coding, biology, and cybersecurity.