What is the z.ai GLM Coding Plan?
The GLM Coding Plan from Zhipu AI (z.ai) is one of the cheapest coding subscriptions available — a few dollars a month for access to the GLM family: GLM-5.1, GLM-5-Turbo, GLM-4.7, GLM-4.6 and GLM-4.5-Air. Plans run from roughly $10/month (Lite) to about $80/month (Max), billed quarterly, with prompt-pool usage limits and MCP extras like web search and a web reader. If GLM is the model you want, it's hard to argue with the price.
The defining trait is focus: it's a single-vendor plan. Every model on it comes from Zhipu.
What is DevPass?
DevPass by LLM Gateway is a flat-rate plan that's single-vendor's opposite. It bundles 200+ models behind one key — the GLM family and Claude Opus 4.8, GPT-5.5, Gemini 3.1 Pro, Kimi, Qwen, DeepSeek and the rest. You get a monthly usage allowance (about $3 of model usage per $1 paid), a per-request cost dashboard, monthly billing, and the freedom to switch models mid-session without touching your config.
Single vendor vs the whole field
GLM models are strong and cheap, and for plenty of tasks they're all you need. But a single-vendor plan has a hard edge: when a job calls for Claude's reasoning, GPT-5.5's breadth or Gemini's long context, a GLM-only plan can't help — you're back to a second subscription and a second key.
DevPass removes that edge. GLM is included, so you don't lose the cheap open-weight option; you simply gain everything else next to it — Claude, GPT-5.5, Gemini and the rest, one key away the moment a task outgrows GLM.
Billing flexibility
z.ai's plan is quarterly. DevPass is monthly, with an optional annual plan that gives you two months free. If you'd rather not pre-commit a quarter at a time, that flexibility is part of the trade.
Who should choose which
Choose the z.ai GLM Coding Plan if GLM models cover your work, you want the lowest entry price, and a quarterly commitment is fine.
Choose DevPass if you want GLM and the frontier models under one key, monthly billing, and a per-request cost breakdown.