# Free GLM API Endpoints & Rate Limits

> 5 providers · 8 free models · Last updated: 01 Nov 2026

## Quick Answer

8 free GLM API models across 5 providers including OpenCode Zen, NVIDIA NIM, and Z.AI. Verified rate limits, context windows, and OpenAI-compatible endpoints. Last updated: 01 Nov 2026.

Free GLM API inference is provided directly by Z.AI (Zhipu BigModel) with GLM-5.1, GLM-4.7-Flash, and GLM-4.6V-Flash, as well as NVIDIA NIM and Kilo Gateway with OpenAI-compatible endpoints.

## Quick Connect

OpenAI-compatible endpoint for free GLM-4.7-Flash inference.

- **Base URL:** `https://open.bigmodel.cn/api/paas/v4/`
- **Model:** `GLM-4.7-Flash`
- **Provider:** [Z.AI (Zhipu)](/providers/z-ai--zhipu/)

```python
from openai import OpenAI

client = OpenAI(
    base_url="https://open.bigmodel.cn/api/paas/v4/",
    api_key="your-api-key",  # from Z.AI (Zhipu)
)

response = client.chat.completions.create(
    model="GLM-4.7-Flash",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
```

## Rate Limits & Model Inventory

| Model | Provider | Cost | Context | RPM | TPM | RPD | Day tokens | Verified |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| GLM-5.3-Flash Free | [OpenCode Zen](/providers/opencode-zen/) | $0 (promo) | 128K - 1M | Not published | Not published | Not published | Not published | 2026-11-01 |
| GLM-5 | [NVIDIA NIM (build.nvidia.com)](/providers/nvidia-nim--build-nvidia-com/) | $0 (trial credits) | Model-dependent | ~40 | Not published | Not published | ~1,000 credits at signup (up to ~5,000) | 2026-10-29 |
| GLM-5.1 | [Z.AI (Zhipu)](/providers/z-ai--zhipu/) | $0 | Up to 203K | 3 (burst) | Not published | 1,000 (1K RPD tier) | Not published | 2026-10-29 |
| GLM-4.5-Flash | [Z.AI (Zhipu)](/providers/z-ai--zhipu/) | $0 | Up to 203K | 3 (burst) | Not published | 1,000 | Not published | 2026-10-29 |
| GLM-4.7-Flash | [Z.AI (Zhipu)](/providers/z-ai--zhipu/) | $0 | Up to 203K | 3 (burst) | Not published | 1,000 | Not published | 2026-10-29 |
| GLM-4.6V-Flash (vision) | [Z.AI (Zhipu)](/providers/z-ai--zhipu/) | $0 | Up to 203K | 3 (burst) | Not published | 1,000 | Not published | 2026-10-29 |
| zai-org/GLM-4.7 | [DeepInfra](/providers/deepinfra/) | $0 (trial credits) | Model-dependent | ~60 (varies by model) | Not published | Not published | $5 signup credits | 2026-11-01 |
| THUDM/glm-4-9b-chat | [SiliconFlow](/providers/siliconflow/) | $0 | 32K | 1000 | 40K | Not published | Not published | 2026-10-29 |

Web page: https://freeinference.dev/free-glm-api/
Machine-readable JSON: /data/providers.json
Agent summary: /llms.txt

Numbers cross-checked against official docs and live probes as of 2026-11-01. Limits change without notice — this is a map, not a contract.