OpenAI just rolled out its GPT-5.6 model family with a tiered pricing structure. The flagship Sol model costs $5 per million input tokens and $30 per million output tokens, while cheaper options scale down for developers who don’t need the full horsepower.
Three tiers, three price points
The GPT-5.6 family breaks down into Sol, Terra, and Luna. Sol sits at the top with that $5/$30 pricing split for input and output respectively. Terra occupies the middle ground at $2.50 per million input tokens and $15 per million output tokens. Luna comes in as the budget option at $1 per million input tokens and $6 per million output tokens.
The rollout followed a limited preview that began on June 26, 2026. Public availability kicked off on July 9, 2026, after a government review of the models’ capabilities.
OpenAI CEO Sam Altman confirmed that the new models deliver a 54% increase in token efficiency on specific tasks compared to previous iterations.
