awesome-free-ai-coding

Z.ai (Zhipu GLM)

🔌 LLM APIs with free tier · no card · live — last verified by a probe on 2026-09-17 · 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

GLM-4.7-Flash, GLM-4.5-Flash and the GLM-4.6V-Flash vision model are the three rows z.ai’s own price table reads Free on all four columns — every other model there says “Limited-time Free” instead, including the flagship GLM-5.x. Rate-limited

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)

Evidence

Probe: the page at https://docs.z.ai/guides/overview/pricing, anchored on GLM-4.7-Flash</td><td style="text-align:left">Free</td>, GLM-4.5-Flash</td><td style="text-align:left">Free</td>, GLM-4.6V-Flash</td><td style="text-align:left">Free</td>
Source: https://docs.z.ai/guides/overview/pricing
Source: https://docs.z.ai/devpack/tool/claude

History

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 to the list: GLM Flash models free on the API (OpenAI-compatible at api.z.ai/api/paas/v4)

Generated from registry.yaml on 2026-09-18 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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