Z.ai (GLM)

GLM models from Z.ai (Zhipu).

Overview

Z.ai’s developer platform is separate from the chat site at chat.z.ai. Signing in to chat does not create an API key.

1
Register or sign in at z.ai/model-api.
2
Optional: top up on the billing page if you want paid models. Some GLM models are free.
3
Open the API Keys page and create a key.
4
Copy the key. Z.ai lets you view it again later.

Cost. Some models are free; others are billed per token. A separate Coding Plan subscription exists with its own keys.

1
Open Loom, then Providers in the menu, and choose Add provider.
2
Pick Z.ai GLM (the search box finds it).
3
Fill in the fields in the table below.
4
Choose Connect. Loom checks the key and says how many models it found. If it cannot check, it says so, and you can Save anyway and try a message.
5
Open the model chip below the message box and pick a model.

Loom’s address is the pay-as-you-go one, https://api.z.ai/api/paas/v4.
If you have a Coding Plan key, change Endpoint to https://api.z.ai/api/coding/paas/v4.

Field in Loom	What to put	Needed
API key	Paste the key you copied. Create one at z.ai → API keys.	Yes
Endpoint	`https://api.z.ai/api/paas/v4`	Pre-filled
Name	Anything you like. It is shown in the model picker	Optional

Appears in Loom as	Z.ai GLM
Sign-in	Your key, sent as `Authorization: Bearer`
Models	Loom fetches the list from your account
Tools (connectors, search)	Yes
Photos	Vision models only
PDFs	No

What you see	What to do
401	You used a Coding Plan key on the pay-as-you-go address, or the other way round.
429	Rate limit. See the limits page in your account.