How to Get a Free Z AI (Zhipu AI) API Key (2026)
3 free models available — no credit card required. Get your Z AI (Zhipu AI) API key →
Overview
Zhipu GLM-4.7-Flash — 200K context, no credit card, 1 concurrent request.
Z AI (Zhipu AI) is a leading Chinese AI lab offering GLM series models for free. The GLM-4.7-Flash model provides 200K context at no cost with no credit card required. Rate limited to 1 concurrent request — best for solo developers and prototyping rather than concurrent workloads.
- GLM-4.7-Flash: 200K context
- No credit card required
- Chinese + English bilingual
- OpenAI-compatible endpoint
API Compatibility: OpenAI SDK-compatible (Chat Completions)
Quick Start Guide
- 1 Sign up at open.bigmodel.cn Phone verification (China). No credit card.
- 2 Go to API Keys in user center
- 3 Create an API key
- 4 Choose a model GLM-4.7-Flash for free tier with 200K context.
- 5 Configure OpenAI client Base URL: https://open.bigmodel.cn/api/paas/v4
All Free Z AI (Zhipu AI) Models — Context Windows & Rate Limits
| Model | Context | Max Output | Modality | Rate Limit | Released | Status | |
|---|---|---|---|---|---|---|---|
| GLM-4.7-Flash | 200K | 128K | 1 concurrent request | — | Online | Details | |
| GLM-4.5-Flash | 128K | 8K | 1 concurrent request | — | Online | Details | |
| GLM-4.6V-Flash | 128K | 4K | 1 concurrent request | — | Online | Details |
Pricing & Limits
Credit Card Not required
Free Tier $25/mo credits
Context Range 128K – 200K
Total Models 3 free
Rate Limits 1 concurrent request
API Compatibility OpenAI SDK-compatible (Chat Completions)
Use Cases
What Z AI (Zhipu AI)'s free models are best for, based on aggregated model capabilities:
Limitations & Caveats
- 1 concurrent request only — unusable for multi-user apps
- China-hosted — high latency outside Asia
- Chinese phone number required for registration