Z.ai

Free

Z.ai is a Coding Assistants tool that helps you write code, build websites, and handle long tasks through chat. You talk to it. It generates the work.

You get a flat monthly rate instead of watching metered bills climb. The cheapest plan starts around $12.60 per month with annual billing.

The tool runs on GLM models from Zhipu AI, a Chinese lab that has trained its own weights since 2019. Chinese infrastructure sits underneath. That matters for some users.

Open it if you need cheap agentic coding and can handle instability. Skip it if you need reliable 24/7 access or have strict data residency rules.

These are the people who get the most from it.

• Solo developers and indie hackers: You get agentic coding help without the $200 monthly bills. You trade some reliability for the savings.
• Full-time developers using agentic coding tools daily: You keep your Claude Code workflow with a simple URL swap. Your costs hit a hard cap.
• Startups watching burn rate: You shave dollars off every coding session. That adds up across a team.
• Anyone already using Claude Code seeking immediate savings: You change one config setting. You do not relearn anything.
• Cost-sensitive markets where $18 vs $200 matters: You stay inside budget that would break with Western tools.
• Users specifically needing GLM model access when other providers unavailable: You get this model family direct from the lab. No reseller markup.
• Those willing to tolerate instability for potentially lower costs: You wait through "peak hours" messages at odd times. You save money anyway.
• Budget-conscious teams needing ChatGPT alternative: You get similar outputs for a fraction of the price. You verify more because of the price.
• Organizations requiring open weights for compliance: You download and host the model yourself. MIT license keeps it clean.
• Users in Russia needing VPN-free access: You reach the service without workarounds. Other tools block you.

These are the parts that keep you coming back.

• Flat-rate coding plans from ~$12.60/month: You know your bill before you start. No surprises after a long session.
• Works in Claude Code, Cline, Roo Code, OpenCode: You keep your exact workflow. One URL change and you are running cheaper.
• Genuinely free Flash API models for testing: You try before you pay. You see if the model fits your code style.
• Same models on every tier: You do not get dumbed-down outputs on the cheap plan. The intelligence stays constant.
• Off-peak usage at 50% credit cost: You schedule heavy work for quiet hours. Your credits stretch further.
• Open weights available for self-hosting: You control the hardware. You meet compliance rules that hosted tools break.

Skip it when these limits block your work.

• Severe and constant rate limiting: You hit "peak hours" messages at 4 AM. You cannot count on access when you need it.
• Updates delete user chats: You lose conversation history without warning. Your context vanishes mid-project.
• Chinese infrastructure: You face data residency questions. Your organization may forbid it outright.
• Support completely unresponsive: You wait weeks for help. Billing issues drag on with no resolution.
• Non-refundable billing: You pay even after cancellation. Your card keeps getting charged.
• Coding Plan restricted to supported tools: You cannot use the API freely. You are locked to specific integrations.