BigModel
activeZhipu AI's open platform featuring GLM series models — permanently free API, available in China, OpenAI-compatible.
https://open.bigmodel.cn/api/paas/v4
Avg Latency
—
90-day Uptime
—%
Rate Limits
30 RPM / — RPD
Sign-up Required
Yes
Info
Base URL https://open.bigmodel.cn/api/paas/v4
Sign-up Required Yes
Credit Card Not required
Context Window 200K
Last Verified 2026-03-29
china-availableopenai-compatiblevisionthinkingfunction-call
Models (4)
glm-4.7-flash
CTX: 200K · 30 RPM
glm-4-flash-250414
CTX: 128K · 30 RPM
glm-4v-flash
CTX: 8K · 30 RPM
glm-4.1v-thinking-flash
CTX: 32K · 30 RPM
Quick Start
export API_KEY="your_api_key_here"
curl https://open.bigmodel.cn/api/paas/v4/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_KEY" \
-d '{
"model": "glm-4.7-flash",
"messages": [
{"role": "user", "content": "Hello! How are you?"}
]
}'