# GLM 5.3 Fast

Speed-optimized version of Z.AI’s GLM-5.3 agentic coding model, built for responsive, real-time workloads. It supports advanced coding, long-horizon task execution, testing, vulnerability discovery, and cybersecurity analysis, making it ideal for developer tools, coding agents, and complex multi-step engineering workflows.

- **Model ID:** `zai/glm-5.3-fast`
- **Type:** chat
- **Providers:** baseten
- **Context window:** 1,048,576
- **Maximum output tokens:** 262,144
- **Pricing:** $2.1/1M input tokens, $6.6/1M output tokens
- **Canonical page:** https://vercel.com/ai-gateway/models/glm-5.3-fast

## Supported parameters

Detailed capability metadata has not been reported for this model.

## Example

```ts
import { streamText } from 'ai'

const result = streamText({
  model: 'zai/glm-5.3-fast',
  prompt: 'Why is the sky blue?'
})
```

## Links

- [Model page](https://vercel.com/ai-gateway/models/glm-5.3-fast)
- [AI Gateway documentation](https://vercel.com/docs/ai-gateway)
- [Provider model documentation](https://www.baseten.co/library/glm-53-fast/)
- [Provider pricing](https://www.baseten.co/library/glm-53-fast/)