# GLM-4.5-Flash

> GLM-4.5-Flash is the free, lightweight tier of Z.ai's GLM-4.5 family, built for reasoning, coding and agent tasks with text in and text out. Served through Respan's Z.ai deployment on a user-owned Respan key.

**ID**: `z-ai/glm-4.5-flash`  
**Creator**: Zhipu AI  
**Category**: text  
**Context**: 128K tokens  
**Pricing**: BYOK — billed by your provider  
**Released**: 2025-07-28  
**Web page**: https://anyrouter.dev/model/z-ai/glm-4.5-flash

**Input modalities**: text  
**Output modalities**: text  

**Capabilities**: chat, streaming, function-calling, reasoning, coding, agentic

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "z-ai/glm-4.5-flash",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| respan-byok | BYOK — billed by your provider | — |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://docs.z.ai/guides/llm/glm-4.5