Notion Adds GPT-5.6 Sol, Terra, and Luna
Notion adds three GPT-5.6 models: Sol for multi-day tasks and self-improving Agents; Terra for GPT-5.5-class workloads at roughly half the cost; Luna for fast small tasks, including Custom Agents.
Pick by task type. Use Sol for long-running work, Terra when cost matters, and Luna for lightweight Custom Agent jobs.

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