Free GLM model via API
Free GLM-5.3, Flash, and nearby versions for coding and agents. Stable model URLs update on their own.
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Z.ai and third-party routers use different keys and caps. Do not mix them in one client without checking.
Benchmarks: Artificial Analysis (October 24, 2026). A dash means the model is not on their leaderboard; we never estimate scores ourselves.
About GLM
Z.ai (Zhipu AI) develops the GLM series: open-weight MoE models tuned for coding, tool use, and agentic workflows, plus fast Flash variants.
FAQ
Which GLM models are free?
Currently 13 models are free: GLM 5.3, GLM 5.3 Flash, GLM 5.2, GLM 4 5v, GLM 4.7 Fp4, GLM 5 Fp4.
Where can I get a free GLM API key?
Free GLM routes are available at: Together AI, NVIDIA Build, UnoRouter, OrcaRouter, OpenCode Zen, Cloudflare Workers AI. Get a key in the provider's dashboard; links are on each model card.
Who develops GLM?
Z.ai (Zhipu AI) develops the GLM series: open-weight MoE models tuned for coding, tool use, and agentic workflows, plus fast Flash variants.