GLM AI refers to the family of large language models developed by Zhipu AI (also known as ChatGLM or GLM series), with the latest flagship models being GLM-4-9B, GLM-4-32B, GLM-Z1-Air, GLM-Z1-Rumination, and the reasoning-focused GLM-4-Plus / GLM-4-Flash variants. These models power high-performance chat experiences, code generation, long-context understanding, multimodal capabilities (vision + text), and agentic workflows through the official web platform chat.z.ai (commonly called Z.ai or Zai AI in English-speaking communities).
Is GLM AI Free or Paid?
GLM AI is primarily free with a very usable free tier. The core web chat experience at chat.z.ai offers generous daily limits on the strongest models (including GLM-4-9B-Chat-1M, GLM-Z1-Air, and GLM-4-Plus in many cases) without requiring payment or a credit card—enough for heavy daily use by most individuals
GLM AI Pricing
The consumer web chat at chat.z.ai is free with high daily quotas on flagship models. Paid GLM Coding Plans are targeted at developers and provide much higher throughput and API-style access.
Here’s a clear breakdown:
| Plan Name | Price (Monthly / Yearly) | Main Features | Best For |
|---|---|---|---|
| Free (Web Chat) | $0 | Generous daily limits on GLM-4-9B, GLM-Z1-Air, GLM-4-Plus & reasoning models, long context, vision, web search, agent mode, no credit card needed | Students, writers, researchers, casual & heavy personal use |
| GLM Coding Lite | ~$10 / ~$100–$120 (annual) | Higher rate limits, priority access, compatibility with 20+ coding tools & IDEs, regular model updates | Hobbyists, students, indie developers with moderate coding usage |
| GLM Coding Pro | ~$30 / ~$300–$360 (annual) | 5× the usage of Lite, 40–60% faster responses, earliest access to new models, built-in vision/web tools | Full-time developers, small teams, frequent agent & coding workflows |
| GLM Coding Max / Ultra | ~$80+ or custom / higher annual | 4×+ the usage of Pro, maximum performance, guaranteed uptime, highest quotas | Agencies, enterprises, heavy users needing uninterrupted high-volume access |
Also Read-Read AI Free, Alternative, Pricing, Pros and Cons
GLM AI Alternatives
GLM AI is especially strong in free-tier performance, Chinese/multilingual quality, coding, and agent capabilities. Here are the main alternatives people compare it against:
| Alternative Tool Name | Free or Paid | Key Feature | How it compares to GLM AI |
|---|---|---|---|
| Z.ai (official GLM web) | Free (generous) | Same models + agent/web/vision tools | This is literally GLM AI—direct access |
| DeepSeek R1 / V3 | Free (generous) | Extremely strong reasoning & coding, huge context | Very close competitor in free coding/math; GLM often faster & better agent mode |
| Qwen 2.5-Max / QwQ-32B | Free (generous) | Alibaba’s top open model, excellent multilingual | Similar free-tier power; GLM frequently wins on speed and agent reliability |
| Grok 3 / Grok 4 | Freemium | Real-time X data + uncensored style | Strong personality & current events; GLM provides deeper free coding & Chinese performance |
| Gemini 2.5 Pro / Flash | Freemium | Google ecosystem, strong multimodal | Excellent research & integration; GLM often cheaper (free) and stronger in pure coding |
GLM AI Pros and Cons
Pros:
- Extremely generous free tier with high daily limits on flagship models
- Outstanding Chinese & multilingual performance (often best-in-class)
- Very strong coding, math, and reasoning capabilities even on free tier
- Fast inference and responsive chat experience
- Built-in agent mode, vision understanding, web search, and long context
- Competitive paid coding plans for developers (much cheaper than many Western equivalents)
- Frequent model releases and rapid improvement curve
- No aggressive paywalls for core chatting and productivity use
Cons:
- Free tier still has rate limits during very heavy daily use
- Paid plans focused mainly on coding/API use (not general chat enhancements)
- Some regions or networks experience occasional access instability
- English performance excellent but can still trail the absolute top Western models in rare edge cases
- Smaller third-party ecosystem compared to OpenAI or Google
- Vision & multimodal features good but not yet class-leading
- Agent reliability depends on prompt quality and task complexit