October 8, 2026 GLM 5.3 on Amazon Bedrock: An Open-Weight Coding Model Behind a Managed API, Tested

TL;DR: GLM 5.3 from Z.ai is a mixture-of-experts coding model with roughly 750B total and about 40B active parameters, a 1M-token context and always-on reasoning, and it is now on Amazon Bedrock for e…