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 4.7, 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 or annual 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. And because DevPass pairs with SoulForge — the graph-powered agent that cuts roughly half your tokens — your allowance stretches further across all of those models, not just one vendor's.
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, a per-request cost breakdown, and SoulForge to cut your token spend.