# GLM 5.3

> Zhipu's newest flagship — coding/agentic upgrade over GLM 5.2. ~1.3M context, open weights.

Human version: https://kymaapi.com/models/glm-5.3
Live JSON: `GET https://kymaapi.com/v1/models` (no auth required)

## Facts

- **Model ID**: `glm-5.3`: pass this as `model` in the request body
- **Creator**: Zhipu AI
- **Released**: 2026-08-14
- **Context window**: 1M tokens
- **Max output**: 131K tokens per response, a hard ceiling, not a default
- **Price**: $1.89 in / $5.94 out per 1M, prompt caching supported (cached rate not published)
- **Capabilities**: tools, reasoning, caching

## Call it

```bash
curl https://kymaapi.com/v1/chat/completions \
  -H "Authorization: Bearer $KYMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "glm-5.3", "messages": [{"role": "user", "content": "Hello"}]}'
```

## See also

- All models: https://kymaapi.com/models.md
- Pricing: https://kymaapi.com/pricing.md
- Other models by Zhipu AI: https://kymaapi.com/models?q=Zhipu%20AI