Free tier - verified
Is the Z.ai API free?
Yes. The Z.ai API offers free Flash models: GLM-4.7-Flash, GLM-4.5-Flash and GLM-4.6V-Flash. Whether a card is required is not stated. Trains on your data: No (for API Services, unless you explicitly agree).
Read from docs.z.ai. Compare every free LLM API
- Offer
- Free tier
- Card required
- Not stated
- Trains on data
- No
- Verified
- 2026-10-18
The offer
- Offer class
Standing free tier
Recorded as: free models
“| GLM-4.7-Flash | Free | Free | Free | Free |”
docs.z.ai “| GLM-4.5-Flash | Free | Free | Free | Free |”
docs.z.ai “| GLM-4.6V-Flash | Free | Free | Free | Free |”
docs.z.ai “Lightweight, Completely Free”
docs.z.ai - How to get it
- Not stated
- Card required
Not stated
Free-tier limits
Values are copied exactly as the provider publishes them, units included. Not stated means the public docs give no value.
No RPM/TPM/concurrency values are published for the free models: the public rate-limit doc URL redirects to the logged-in console (z.ai/manage-apikey/rate-limits). Not free: GLM-5.3-Flash ($0.15 in / $0.50 out per 1M), GLM-4.7-FlashX, GLM-4.6V-FlashX.
Does it train on your data?
No
For API Services, unless you explicitly agree
No for API Services unless you explicitly agree (but the same terms reserve training rights over 'individual users').
“For enterprises and developers using API Services, we will not use your User Content for developing or improving Services unless you explicitly agree to such use. Please refer to Additional Terms for further details.”
“We will not use End User Content to develop or improve Services, unless you explicitly agree to such use.”
“For individual users, we reserve the right to process any User Content to improve our existing Services and/or to develop new products and services, including for our internal business operations and for the benefit of other customers.”
Restrictions
Rate limits only visible in the logged-in console
https://docs.z.ai/api-reference/rate-limit redirected to https://z.ai/manage-apikey/rate-limits (console login page) on 2026-10-18 docs.z.ai
Upgrade path
FAQ
Is the Z.ai API free?
Yes. The Z.ai API offers free Flash models: GLM-4.7-Flash, GLM-4.5-Flash and GLM-4.6V-Flash. Whether a card is required is not stated. Trains on your data: No (for API Services, unless you explicitly agree).
What are the Z.ai (GLM) free limits?
3 Flash models priced Free; rate limits shown only in the logged-in console. No RPM/TPM/concurrency values are published for the free models: the public rate-limit doc URL redirects to the logged-in console (z.ai/manage-apikey/rate-limits). Not free: GLM-5.3-Flash ($0.15 in / $0.50 out per 1M), GLM-4.7-FlashX, GLM-4.6V-FlashX.
Does Z.ai (GLM) train on your data?
No (for API Services, unless you explicitly agree). The terms say: "For enterprises and developers using API Services, we will not use your User Content for developing or improving Services unless you explicitly agree to such use. Please refer to Additional Terms for further details."
Sources
Last verified from Z.ai (GLM)'s own pages below. Quotes are verbatim.
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