> ## Documentation Index
> Fetch the complete documentation index at: https://www.vibecodeapp.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# GLM 5.3

> Z.ai's flagship reasoning model

GLM 5.3 is Z.ai's flagship reasoning model, built for coding, agentic tasks, and long-running tool use at a fraction of frontier pricing.

Thinking is on by default and can be turned off per request for fast replies.

## Best For

* Coding assistants
* Agent workflows
* Reasoning-heavy features
* Cost-sensitive apps that need strong quality

## Features

* Strong reasoning
* Thinking on by default
* Can turn thinking off for fast replies
* Low cost for its quality

## Ask Vibecode

Tell the AI:

> "Add GLM 5.3 to my app for strong reasoning at a low cost."

The AI will set up the integration automatically.

## Choose This If

Choose GLM 5.3 when you want strong reasoning without frontier pricing. For faster, cheaper responses, use [GLM 5.3 Flash](/docs/integrations/glm-5-3-flash).

<CardGroup cols={2}>
  <Card title="Browse All Integrations" icon="grid-2" href="/docs/integrations/index">
    See the full integrations catalog
  </Card>

  <Card title="GLM 5.3 Flash" icon="message-bot" href="/docs/integrations/glm-5-3-flash">
    Faster, lower-cost GLM
  </Card>
</CardGroup>


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