Explanation:

Amazon Bedrock is a fully managed service that offers a choice of high-performing foundation models (FMs) from leading AI companies. Among the options:

1. Claude (Anthropic) - This is a transformer-based model developed by Anthropic. Claude is indeed based on transformer architecture, which is the standard architecture for most modern large language models.

2. DALL·E - This is an image generation model developed by OpenAI that uses a modified transformer architecture combined with diffusion models.

3. Stable Diffusion - This is an image generation model that uses diffusion models rather than pure transformer architecture.

4. Whisper - This is an automatic speech recognition (ASR) system developed by OpenAI that uses transformer architecture for speech-to-text tasks.

While DALL·E and Whisper also use transformer architecture, the question specifically asks about Amazon Bedrock foundation models. Claude (Anthropic) is available as a foundation model on Amazon Bedrock, making it the correct answer in this context.