GLM-5.3 API & Playground | Fireworks AI

This post announces the availability of GLM-5.3 on the Fireworks AI inference platform. It highlights that GLM-5.3 is a post-trained version of GLM-5.2, offering significant improvements in complex coding and long-horizon tasks. The post details its availability via serverless API (pay-per-token) and on-demand deployment on dedicated GPUs, emphasizing high reliability and no rate limits. Pricing for serverless usage is provided. Technical specifications include 743B parameters and a 1040k token context length. Fine-tuning is noted as not supported for this specific model version.