Spline offers an AI Text integration that lets designers connect OpenAI's GPT models (including GPT-4o) to their 3D scenes, enabling AI-generated text responses to update scene content or trigger animations in response to user interactions. Designers must supply their own paid OpenAI API key.

The OpenAI API integration is configured in Spline's Variables & Data Panel. Designers select a GPT model (GPT-3.5 Turbo, GPT-4 Turbo, GPT-4o mini, or GPT-4o), set a prompt, and map AI responses to scene variables or actions. This allows dynamic dialogue boxes, AI-driven story content, or personalized interactions to appear inside the published 3D experience. The API can be triggered on scene load or by specific user events.