GLM 5.1 from Z.ai is now available on Vercel AI Gateway .

Designed for long-horizon autonomous tasks, GLM-5.1 can work continuously on a single task for extended periods, handling planning, execution, testing, and iterative refinement in a closed loop. Rather than one-shot code generation, it runs an autonomous cycle of benchmarking, identifying bottlenecks, and optimizing across many iterations, with particular strength in sustained multi-step engineering workflows.

Beyond agentic coding, GLM-5.1 improves on general conversation, creative writing, front-end prototyping, and office productivity tasks like generating PowerPoint, Word, and Excel documents.

To use GLM 5.1, set model to zai/glm-5.1 in the AI SDK .

import { streamText } from 'ai' ;

const result = streamText ( {

model : 'zai/glm-5.1' ,

prompt :

` Refactor the data ingestion pipeline to support streaming,

add error recovery, and benchmark throughput against the

current implementation.…