GLM 5.1 on AI Gateway

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.

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import { streamText } from 'ai';
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const result = streamText({
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  model: 'zai/glm-5.1',
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  prompt:
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    `Refactor the data ingestion pipeline to support streaming,
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     add error recovery, and benchmark throughput against the
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     current implementation.`,
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});

AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting, observability, Bring Your Own Key support, and intelligent provider routing with automatic retries.

Learn more about AI Gateway, view the AI Gateway model leaderboard or try it in our model playground.