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GLM 5.1

GLM 5.1 advances Z.ai's GLM-5 generation with a focus on long-horizon autonomous coding. It can work independently on a single task for over eight hours, planning, executing, and iterating until it delivers engineering-grade results.

ReasoningTool UseImplicit Caching
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'zai/glm-5.1',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • How long can GLM 5.1 work on a single task?

    Over eight hours of continuous autonomous operation. It plans, executes, tests, and iterates on its own output throughout that window.

  • How does GLM 5.1 differ from GLM-5?

    GLM-5 introduced multiple thinking modes and agentic workflows for general-purpose reasoning. GLM 5.1 builds on that foundation with a specific focus on long-horizon coding tasks, sustaining autonomous operation for hours rather than minutes.

  • What is the context window for GLM 5.1?

    204.8K tokens.

  • What is the pricing for GLM 5.1?

    Check the pricing panel on this page for today's numbers. AI Gateway tracks rates across every provider that serves GLM 5.1.

  • How do I access GLM 5.1 through AI Gateway?

    Use the zai/glm-5.1 model identifier with your AI Gateway API key. No separate Z.ai account is needed. BYOK is also supported.