GPT-5.6 is live, but Sol is not the default answer. I ran the cost math on Sol, Terra, Luna, long context, caching, and four real workloads.

More intelligence from every token, stronger performance per dollar, and more capability on demand for your hardest work.

OpenAI launches GPT-5.6 with Sol, Terra, and Luna tiers priced from $1 to $5 per million input tokens, reshaping AI costs for crypto developers.