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Z.ai (Zhipu GLM) free tier

🔌 LLM APIs with free tier · no card · live — last verified by a probe on 2026-11-01 · z.ai · back to the whole list

What you get

GLM Flash models free on the API, vision included (OpenAI-compatible at api.z.ai/api/paas/v4)

Free models

glm-4.7-flash, glm-4.5-flash, glm-4.6v-flash

Limits, in the vendor’s words

Free Flash models: Usage allowance: amount not published (period not published) per account

GLM-4.7-Flash, GLM-4.5-Flash and GLM-4.6V-Flash have free input and output prices. The flagship rows’ limited-time-free cached-storage column does not make their input or output free. No numerical rate or usage allowance is published.

Where it is offered

Not offered in Cuba, Iran or North Korea, under comprehensive US embargo, and in no other country the vendor names (source, read 2026-09-26). In the vendor’s words: “You confirm that you are not located in the following regions: Iran, North Korea, Cuba, Crimea, Donetsk, or Zaporizhzhia”.

What happens to what you send

What you send is not used to train models. In the vendor’s words: “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.” (source).

Connect

• Base URL: https://api.z.ai/api/paas/v4
• Key: ZAI_GLM_API_KEY — get one at https://z.ai/manage-apikey/apikey-list
• Anthropic-format base (Claude Code’s ANTHROPIC_BASE_URL): https://api.z.ai/api/anthropic
• Callable ids: glm-4.7-flash, glm-4.5-flash, glm-4.6v-flash
• Note: the ids are the chat completion reference’s own, where glm-4.7-flash and glm-4.5-flash sit in its model enum; Coding-Plan keys use https://api.z.ai/api/coding/paas/v4 instead. The Claude Code guide sets ANTHROPIC_BASE_URL to https://api.z.ai/api/anthropic with “your_zai_api_key” as the token and names Coding-Plan ids (glm-5.3, glm-5.3-flash); whether the free Flash ids answer on that route is not stated, and the route answers 401 keyless (2026-09-05)

Try it from your terminal with your key in ZAI_GLM_API_KEY — it goes from your machine to the vendor and nowhere else:

curl -s https://api.z.ai/api/paas/v4/chat/completions \
  -H "Authorization: Bearer $ZAI_GLM_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"model":"glm-4.7-flash","messages":[{"role":"user","content":"2+2? MAKE NO MISTAKES."}]}'

Evidence

• Probe: the page at https://docs.z.ai/guides/overview/pricing.md, anchored on GLM-4.7-Flash | Free | Free | Free | Free, GLM-4.5-Flash | Free | Free | Free | Free, GLM-4.6V-Flash | Free | Free | Free | Free
• Source: https://docs.z.ai/guides/overview/pricing
• Source: https://docs.z.ai/devpack/tool/claude
• Source: https://docs.z.ai/guides/overview/pricing.md

History

Each line is a change to what this page publishes, dated the day it reached the list, in UTC.

• 2026-08-14 — Free models changed: added glm-4.5-flash, glm-4.6v-flash
• 2026-07-27 — Free models changed: added glm-4.7-flash; dropped glm-4.5
• 2026-07-19 — Added: GLM Flash models free on the API (OpenAI-compatible at api.z.ai/api/paas/v4)

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Generated from registry.yaml on 2026-11-01 and re-verified twice a week; the full list, the Atom feed and the machinery are at https://github.com/mvalentsev/awesome-free-ai-coding.

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