OpenAI Unveils Sora 2 Text-to-Video Model
OpenAI has unveiled Sora 2, its next-generation text-to-video model capable of generating high-quality videos up to one minute long from natural language prompts. The new model features enhanced scene realism, support for multi-character interactions, and complex visual storytelling. Sora 2's capabilities are positioned to compete with or surpass existing tools like Runway, with integrations planned via both API and a browser-based interface.
- The initial version of Sora was first made available to a "red team" of experts to identify potential misuse and harms before a gradual public release to ChatGPT Plus and Pro users in the U.S. and Canada on December 9, 2024. - Sora 2's underlying technology is a diffusion transformer, which generates video by creating and then cleaning up 3D blocks of visual data called "patches," a technique evolved from the architecture of the DALL-E 3 image generation model. - A significant advancement in Sora 2 is the integration of synchronized audio, allowing it to generate not just video but also corresponding dialogue, sound effects, and background music. - OpenAI released an API for Sora 2 on October 7, 2025, moving to a per-second billing model. The "sora-2" standard model is priced at $0.10 per second, while the higher-resolution "sora-2-pro" model costs between $0.30 and $0.50 per second. - To combat misuse, all generated videos contain a visible, moving digital watermark, though reports indicate third-party programs to remove it became prevalent shortly after release. - The model underwent adversarial testing by a specialized "red team" tasked with assessing risks related to misinformation and bias before its public release. - Content moderation for Sora 2 involves a three-layer process that scans text prompts for sensitive terms, reviews uploaded media for copyrighted material, and analyzes individual video frames for policy violations before the final output is available. - In the competitive landscape, Runway is a primary alternative. While Sora 2 is noted for its high degree of photorealism, Runway's platform is often highlighted for offering more direct user control, editing flexibility, and multiple input methods, including text-to-video, image-to-video, and video-to-video transformations.
