NEW AI Video Generator Creates Long AI Videos With ONE Prompt
Agent Opus introduces a streamlined workflow for generating long-form narrative videos from a single prompt, shifting the paradigm away from stitching short 15-second clips together.
What this lesson covers
This video demonstrates Agent Opus, a new AI video generator that creates multi-minute videos from a single prompt and script. The creator walks through story mode generation, voiceover integration, and tips for optimizing long-form AI video output.
Key takeaways from the creator
AI-extracted notes, not independently verified product claims. Timestamp links let you check each point in the original video.
- 0:00 ↗
Agent Opus allows users to generate AI videos up to 4 minutes long using a single prompt, script, or audio file.
- 1:35 ↗
Story mode in Agent Opus features pre-made styles like claymation, collage, and 2D line, alongside custom style creation using user-uploaded assets.
- 2:24 ↗
The quality of the final generated video heavily depends on the strength and clarity of the input script or voiceover.
- 3:54 ↗
External language models like Claude and ChatGPT can be utilized with structured prompt templates to draft comprehensive scripts for short-form or long-form videos.
- 5:42 ↗
Audio files generated via third-party tools like Fish Audio may require re-rendering in external editors like Premiere or CapCut to ensure compatibility with Agent Opus uploads.
Workflow outlined in the video
- Draft a detailed narrative script using Claude or ChatGPT with a specialized prompt structure.
- Generate a custom voiceover using tools like Fish Audio or ElevenLabs, ensuring the audio file format is fully compatible.
- Open Agent Opus and select story mode, choosing either a pre-made visual style or creating a custom style with uploaded assets.
- Input your script and uploaded audio file into Agent Opus, tweak generation settings such as aspect ratio and speed, and run the generation process.
Before you use this workflow
These notes describe the source video at its publication date. Model access, pricing, connectors and interfaces may have changed. Check the original source and the provider’s current documentation before installing an add-on, connecting an account or spending credits.
ReelStack has not independently tested this workflow. Preview one representative shot and check motion, continuity and output quality before applying it to a full production. No result, cost saving or model capability is guaranteed.
Explore the tools
How to interpret the numbers
153,111 views captured 23 October 2026. ReelStack recommendation score: 22/100. Formula: radar-v5. This is ReelStack’s calculation, not a YouTube rating or a measure of factual accuracy.
Show the calculation
- 45% performance: 0.71× views vs 5 other channel videos observed at a similar age. View-evidence factor 99% (views / (views + 1,000))
- 25% freshness: 0/100 with a 14-day half-life
- 20% momentum: 81 views/day vs 393 channel baseline (3 comparable uploads), with the same view-evidence factor
- 10% engagement: 3/100; likes + 4× comments, smoothed with a 500-view neutral prior