---
id: "2024-02-15-sora"
url: "https://postcutoff.com/e/2024-02-15-sora/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2024-02-15"
date_precision: day
category: media-generation
importance: 4
confidence: high
status: [Confirmed]
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2024-02-15-sora/

# OpenAI previews Sora, a text-to-video 'world simulator'

OpenAI previewed Sora, a diffusion-transformer model generating up to a minute of high-fidelity video from text, framing video generation as a path toward general-purpose simulators of the physical world.

## Key facts
- Previewed 15 February 2024 (red-teamers and selected artists only)
- Generated videos up to one minute long
- Diffusion transformer operating on spacetime patches
- Publicly released to ChatGPT Plus/Pro users on 9 December 2024
- Succeeded by Sora 2 in September 2025

## What happened

OpenAI released sample videos showing a dramatic leap in coherence, length and realism over previous text-to-video systems.

## Why it matters

Reset expectations for AI video overnight and triggered a video-generation race (Veo, Kling, Runway Gen-3).

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Sora (OpenAI)](https://openai.com/index/sora/) (openai.com, official)
2. [Video generation models as world simulators (OpenAI technical report)](https://openai.com/index/video-generation-models-as-world-simulators/) (openai.com, paper)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2025-09-30: [OpenAI launches Sora 2 and the Sora social app](https://postcutoff.com/e/2025-09-30-sora-2/index.md)
- 2025-05-20: [Google's Veo 3 generates video with native audio](https://postcutoff.com/e/2025-05-20-veo-3/index.md)
- Archived: 4 videos, listed in https://postcutoff.com/e/2024-02-15-sora/index.json