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Sora is an AI model developed by OpenAI that can create realistic and imaginative videos from text instructions.

Key Features of Sora

• Generates videos up to 1 minute long while maintaining visual quality and adhering to the user's prompt
• Simulates the physical world in motion, with the goal of helping solve real-world problems
• Supports multiple characters, specific motion types, subjects, and background details with accuracy
• Can take an existing still image or video and animate it, extend it, or fill in missing frames

Sora is currently only available to a select group of expert testers for assessing potential issues. There is no public release date set yet, but OpenAI plans to engage with policymakers, educators and artists to understand concerns and identify positive use cases before a broader rollout.

Sora uses a diffusion model approach, starting with static noise and gradually transforming it into the desired video over many steps. It employs a transformer architecture similar to GPT models, representing videos as collections of smaller data units called patches.

While impressive, Sora has some limitations, such as difficulty accurately simulating complex physics, maintaining spatial details over time, and avoiding unnatural object deformation. OpenAI is working on safety measures like adversarial testing and content detection tools to mitigate potential misuse.