Writer introduces new AI model and upgraded harness to contain token costs

Writer introduced a new AI system built as a post-training variation of Z.ai’s open source GLM-5.2 model. The company says the model, paired with an upgraded harness, is designed to deliver deployment-ready capabilities while keeping token costs much lower.

The launch reflects a broader push toward adapting open source foundation models for enterprise use rather than training expensive models from scratch. Better cost control around tokens could make generative AI deployments more predictable and attractive for businesses scaling production workloads.