
Inspecting an image model (Stable Diffusion)
I opened the Stable Diffusion entry because it’s a widely used family for text-to-image generation. The model overview highlights useful technical details you should note when designing prompts:- Model size: 8 billion parameters (for this entry).
- Hosting: serverless (no provisioning required).
- Input limits: about 77 tokens — typical of CLIP-style encoders (see CLIP for details).

Generating images in Playground
From the Model Catalog you can open Playground to run quick, interactive tests. Example workflow:- Choose the provider (e.g., Stability AI) and the model (e.g., Stable Diffusion).
- Pick a profile (for example,
On-Demand) and click Apply. - Enter a descriptive prompt — e.g., “Solar system showing Earth’s position relative to the Sun.”
- Generate the image, then inspect, create variations, or download the resulting asset.

Video models and region availability
Video-capable models are less common and often depend on the selected AWS region. In the Oregon region (us-west-2 at the time of this lesson) there was only one video model listed: Ray by Luma AI. Note that Ray may be deprecated in that region — model lifecycle and availability can change. If a given video model is deprecated or unavailable, switching regions is a common workaround. For example, switching the console to US East (N. Virginia) surfaces Amazon’s Nova Reel, which supports text-to-video and image-to-video workflows.

Generating video in Playground (Nova Reel example)
Steps to generate video in Playground:- Open Playground and select the Nova Reel model (choose
Output: Videoand the desired version, e.g.,1.1). - Apply the model. Playground will warn that video generation runs as a background job and that the output will be stored in an
S3bucket.- If you don’t have an
S3bucket set up, the console can prompt you to create one. - Note:
S3storage incurs standardS3charges in addition to Bedrock request charges.
- If you don’t have an
- Enter a prompt (for example, “sports car driving through a city at night”) and submit the job.
- Video jobs can take a few minutes. Playground shows the job history and the
S3bucket location for the resulting asset.


Model availability summary
Model availability varies significantly by region and provider. Use the Model Catalog to verify which modalities are offered in your selected region and check the model lifecycle state (stable, legacy, deprecated) before relying on a model for production.Model access and permissions
The console used to include a “Model access” page where you requested access to third-party models. That page has been retired: most serverless models are now enabled by default, and access control is handled throughIAM policies. Use IAM to control which users and roles can call specific models.

The Model Access page has been retired. Use
IAM to control which users and roles can call specific models. If you see older documentation that instructs you to request model access, follow the current IAM-based controls instead.What this enables for your team
- Faster developer onboarding to Amazon Bedrock without needing to write code first.
- Rapid, interactive experimentation with different foundation models via Playground.
- Faster prompt engineering and identification of candidate models for your use case.
- Reduced development risk by validating model behavior in a sandbox before integrating into production.



- Amazon Bedrock documentation: https://docs.aws.amazon.com/bedrock/
- Amazon S3: https://aws.amazon.com/s3/
- AWS Identity and Access Management (
IAM): https://aws.amazon.com/iam/ - Stability AI (Stable Diffusion): https://stability.ai/
- Luma AI (Ray): https://www.luma.ai/