Introducing GLM 5.3 on Amazon Bedrock

The GLM 5.3 large language model is now accessible through Amazon Bedrock. This model utilizes a mixture-of-experts (MoE) architecture with approximately 753 billion parameters and is specifically designed for coding-related applications.

Model Architecture and Specialization

GLM 5.3 is a mixture-of-experts (MoE) model, a design that allows for very large parameter counts while managing computational costs. With approximately 753 billion parameters, it is built for high-performance tasks. The model is specifically optimized for coding tasks and is also designed to handle long-horizon agentic tasks, which involve complex, multi-step processes.

Availability and API Access

Developers can access GLM 5.3 through the Amazon Bedrock platform. A key feature for integration is its support for invocation via OpenAI-compatible APIs, which simplifies the process of incorporating the model into existing applications and workflows. The source also notes that users can potentially reduce cost and latency by using prompt caching.

Confirmed Information

The available information confirms the following details: GLM 5.3 is an MoE model with ~753 billion parameters, it is available on Amazon Bedrock, it supports OpenAI-compatible APIs, and it is intended for coding and agentic tasks. The source material did not contain separate claims classified as uncertain or marketing, providing a straightforward set of technical specifications.

Source: Introducing GLM 5.3 on Amazon Bedrock