vision-language
Molmo2-4B Video Captioner: Generate detailed, accurate captions for videos with customizable detail levels (low, medium, high). Open-source vision-language model with temporal understanding capabilities. Ready-to-use REST API, no cold starts, duration-based pricing.
Idle
Your request will cost $0.005 per run.
For $1 you can run this model approximately 200 times.
ExamplesView all
README
Molmo2 Video Captioner
Molmo2 Video Captioner is an intelligent video understanding model that generates detailed captions and descriptions for video content. Upload a video and receive natural-language descriptions of scenes, actions, objects, and events — with adjustable detail levels to match your workflow needs.
Perfect for content creators, accessibility teams, and developers building video understanding pipelines.
Why Choose This?
-
Adjustable detail levels Choose from low, medium, or high detail to control caption depth — from quick summaries to comprehensive scene breakdowns.
-
Scene-aware captioning Understands context, actions, objects, environments, and temporal flow to produce coherent, meaningful descriptions.
-
Flexible video input Accepts video uploads or public URLs for seamless integration into existing workflows.
-
Fast processing Optimized for quick turnaround while maintaining caption accuracy and coherence.
-
Production-ready API Ready-to-use REST endpoint with predictable per-second pricing and no cold starts.
Parameters
| Parameter | Required | Description |
|---|---|---|
| video | Yes | Input video (upload or public URL) |
| detail_level | No | Caption detail: low, medium (default), or high |
Detail Level Options
- Low — Brief, high-level summary of the video content
- Medium — Balanced description with key scenes and actions (default)
- High — Comprehensive breakdown with fine-grained details
How to Use
- Upload your video — drag and drop a file or paste a public video URL.
- Select detail level — choose low, medium, or high based on your needs.
- Submit — the model processes the video and returns a caption.
- Use the output — integrate captions into your content, accessibility tools, or data pipelines.
Pricing
Per-5-second billing with a 5-second minimum.
| Video Duration | Cost |
|---|---|
| Up to 5s | $0.005 |
| 10s | $0.01 |
| 30s | $0.03 |
| 60s | $0.06 |
| 120s (max) | $0.12 |
Billing Rules
- Minimum charge: 5 seconds ($0.005)
- Rate: $0.001 per second ($0.005 per 5 seconds)
- Maximum video length: 120 seconds (2 minutes)
Best Use Cases
- Accessibility — Generate video descriptions for visually impaired users and screen readers.
- Content indexing — Create searchable metadata for video libraries and archives.
- Social media — Auto-generate captions for posts, reels, and stories.
- Video SEO — Improve discoverability with rich text descriptions for video content.
- Surveillance and monitoring — Summarize footage for quick review and logging.
- Education — Describe instructional videos for enhanced learning materials.
Notes
- If using a URL, ensure it is publicly accessible. A preview thumbnail in the interface confirms successful access.
- For videos longer than 2 minutes, split into segments and process separately.
- Clear, well-lit footage yields the most accurate captions.
- Use high detail level for complex scenes; low detail for quick overviews.