Free GLM-5.3-Flash API
Updated 8/31/2026
GLM-5.3-Flash (原 Ox Alpha) 320B-A18B 混合注意力极速代码与 Agent 模型，1M 上下文，官方免费不限量。
About the Model
为什么选择 GLM-5.3-Flash？
GLM-5.3-Flash（原代号 Ox Alpha）是智谱 AI 发布的轻量旗舰模型，采用 320B 总参数、18B 激活的混合注意力 MoE 架构，支持 100 万 Token 上下文与亚秒级响应，官方提供终身免费调用额度。
Try it in your browser
Pick a model, paste your own free key, and run. Your key is sent once to call the provider and never stored on our servers.
Pick a model, paste your own free key, and run. Your key is sent once to call the provider and never stored on our servers.
How to call GLM-5.3-Flash
curl https://open.bigmodel.cn/api/paas/v4/chat/completions \
-H "Authorization: Bearer $ZHIPU_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "glm-5.3-flash",
"messages": [{"role": "user", "content": "Write a fast quicksort in TypeScript"}]
}'Compare Free Providers
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