Z.ai (Zhipu AI)
permanent free · model_vendor · verification: partially_verified (65%, doc_fetch, 2026-07-17) · setup guide →
The record
| Base URLs | https://api.z.ai/api/paas/v4 openai-compatible |
|---|---|
| API key required | yes |
| Credit card | no |
| Phone verification | unknown |
| May train on prompts | unknown |
| Quota | free_forever [concurrency] “Permanent free models, no credit card required. Rate limit: 1 concurrent request (mnfst data.json). Z.ai pricing page: GLM-4.7-Flash and GLM-4.5-Flash 'Free' for input, cached input, cached input storage, and output; GLM-4.6V-Flash free vision model.” |
| Signup friction | 3 steps · ~5m to first key |
| Env var | ZAI_API_KEY |
| Notes | International platform base URL https://api.z.ai/api/paas/v4 confirmed via official quick-start (OpenAI SDK compatible, Bearer auth). Mainland-China platform uses https://open.bigmodel.cn/api/paas/v4 (the endpoint listed in mnfst data.json) — same model family, separate account systems. |
Models (3)
| model | capabilities | context | free | limits |
|---|---|---|---|---|
| glm-4.5-flash | chat | ? | yes | 'Free' for input, cached input, cached input storage, and output (official pricing page); concurrency limit unknown |
| glm-4.6v-flash | chat, vision | 128,000 | yes | 1 concurrent request (mnfst data.json); free vision model per official pricing page |
| glm-4.7-flash | chat | 200,000 | yes | 1 concurrent request (mnfst data.json); 'Free' pricing per official pricing page |
Provenance
| source_repo_mnfst | curated_repo | trust: medium_high | checked 2026-07-17 |
| source_zai_docs | official_pricing | trust: high | checked 2026-07-17 |